./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2c_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2c_append_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9aabbeff87ba819b44dc608a3105d0ba81b71cd88693ecf2e6bf3860a7863e64 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 19:09:16,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 19:09:16,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 19:09:16,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 19:09:16,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 19:09:16,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 19:09:17,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 19:09:17,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 19:09:17,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 19:09:17,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 19:09:17,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 19:09:17,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 19:09:17,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 19:09:17,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 19:09:17,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 19:09:17,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 19:09:17,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 19:09:17,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 19:09:17,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 19:09:17,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 19:09:17,024 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 19:09:17,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 19:09:17,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 19:09:17,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 19:09:17,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 19:09:17,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 19:09:17,033 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 19:09:17,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 19:09:17,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 19:09:17,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 19:09:17,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 19:09:17,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 19:09:17,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 19:09:17,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 19:09:17,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 19:09:17,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 19:09:17,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 19:09:17,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 19:09:17,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 19:09:17,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 19:09:17,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 19:09:17,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 19:09:17,042 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 19:09:17,059 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 19:09:17,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 19:09:17,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 19:09:17,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 19:09:17,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 19:09:17,060 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 19:09:17,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 19:09:17,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 19:09:17,061 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 19:09:17,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 19:09:17,062 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 19:09:17,062 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 19:09:17,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 19:09:17,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 19:09:17,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 19:09:17,063 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 19:09:17,063 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 19:09:17,063 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 19:09:17,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 19:09:17,063 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 19:09:17,064 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 19:09:17,064 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 19:09:17,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 19:09:17,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 19:09:17,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 19:09:17,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:09:17,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 19:09:17,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 19:09:17,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 19:09:17,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 19:09:17,065 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aabbeff87ba819b44dc608a3105d0ba81b71cd88693ecf2e6bf3860a7863e64 [2022-07-12 19:09:17,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 19:09:17,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 19:09:17,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 19:09:17,280 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 19:09:17,281 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 19:09:17,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2022-07-12 19:09:17,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3dfb8d5e/d617dd60f6d147729913e04dd23cb1a9/FLAGa98b1e0d9 [2022-07-12 19:09:17,758 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 19:09:17,758 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2022-07-12 19:09:17,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3dfb8d5e/d617dd60f6d147729913e04dd23cb1a9/FLAGa98b1e0d9 [2022-07-12 19:09:17,778 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3dfb8d5e/d617dd60f6d147729913e04dd23cb1a9 [2022-07-12 19:09:17,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 19:09:17,783 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 19:09:17,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 19:09:17,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 19:09:17,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 19:09:17,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:09:17" (1/1) ... [2022-07-12 19:09:17,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e890cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:17, skipping insertion in model container [2022-07-12 19:09:17,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:09:17" (1/1) ... [2022-07-12 19:09:17,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 19:09:17,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 19:09:18,112 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2022-07-12 19:09:18,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:09:18,122 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 19:09:18,156 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2022-07-12 19:09:18,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:09:18,183 INFO L208 MainTranslator]: Completed translation [2022-07-12 19:09:18,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:18 WrapperNode [2022-07-12 19:09:18,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 19:09:18,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 19:09:18,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 19:09:18,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 19:09:18,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:18" (1/1) ... [2022-07-12 19:09:18,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:18" (1/1) ... [2022-07-12 19:09:18,236 INFO L137 Inliner]: procedures = 127, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2022-07-12 19:09:18,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 19:09:18,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 19:09:18,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 19:09:18,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 19:09:18,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:18" (1/1) ... [2022-07-12 19:09:18,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:18" (1/1) ... [2022-07-12 19:09:18,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:18" (1/1) ... [2022-07-12 19:09:18,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:18" (1/1) ... [2022-07-12 19:09:18,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:18" (1/1) ... [2022-07-12 19:09:18,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:18" (1/1) ... [2022-07-12 19:09:18,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:18" (1/1) ... [2022-07-12 19:09:18,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 19:09:18,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 19:09:18,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 19:09:18,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 19:09:18,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:18" (1/1) ... [2022-07-12 19:09:18,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:09:18,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:09:18,303 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) [2022-07-12 19:09:18,307 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 [2022-07-12 19:09:18,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 19:09:18,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 19:09:18,338 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-12 19:09:18,338 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-12 19:09:18,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 19:09:18,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 19:09:18,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 19:09:18,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 19:09:18,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 19:09:18,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 19:09:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 19:09:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 19:09:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 19:09:18,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 19:09:18,424 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 19:09:18,425 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 19:09:18,712 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 19:09:18,722 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 19:09:18,723 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 19:09:18,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:09:18 BoogieIcfgContainer [2022-07-12 19:09:18,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 19:09:18,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 19:09:18,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 19:09:18,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 19:09:18,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 07:09:17" (1/3) ... [2022-07-12 19:09:18,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647be340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:09:18, skipping insertion in model container [2022-07-12 19:09:18,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:18" (2/3) ... [2022-07-12 19:09:18,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647be340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:09:18, skipping insertion in model container [2022-07-12 19:09:18,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:09:18" (3/3) ... [2022-07-12 19:09:18,740 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_append_unequal.i [2022-07-12 19:09:18,750 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 19:09:18,750 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2022-07-12 19:09:18,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 19:09:18,790 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@10fca75c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@42f40dc9 [2022-07-12 19:09:18,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2022-07-12 19:09:18,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:18,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 19:09:18,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:18,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 19:09:18,799 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:18,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:18,803 INFO L85 PathProgramCache]: Analyzing trace with hash 895672562, now seen corresponding path program 1 times [2022-07-12 19:09:18,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:18,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329710235] [2022-07-12 19:09:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:18,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:09:18,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:18,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329710235] [2022-07-12 19:09:18,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329710235] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:18,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:18,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:09:18,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128372097] [2022-07-12 19:09:18,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:18,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:09:18,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:18,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:09:18,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:09:18,999 INFO L87 Difference]: Start difference. First operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:09:19,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:19,121 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2022-07-12 19:09:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:09:19,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-12 19:09:19,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:19,131 INFO L225 Difference]: With dead ends: 135 [2022-07-12 19:09:19,131 INFO L226 Difference]: Without dead ends: 132 [2022-07-12 19:09:19,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:09:19,136 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:19,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 207 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:09:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-12 19:09:19,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-07-12 19:09:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 67 states have (on average 2.014925373134328) internal successors, (135), 127 states have internal predecessors, (135), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2022-07-12 19:09:19,175 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 6 [2022-07-12 19:09:19,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:19,176 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2022-07-12 19:09:19,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:09:19,176 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2022-07-12 19:09:19,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 19:09:19,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:19,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 19:09:19,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 19:09:19,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:19,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:19,178 INFO L85 PathProgramCache]: Analyzing trace with hash 895672563, now seen corresponding path program 1 times [2022-07-12 19:09:19,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:19,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527498359] [2022-07-12 19:09:19,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:19,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:09:19,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:19,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527498359] [2022-07-12 19:09:19,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527498359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:19,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:19,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:09:19,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124619564] [2022-07-12 19:09:19,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:19,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:09:19,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:19,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:09:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:09:19,246 INFO L87 Difference]: Start difference. First operand 132 states and 141 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:09:19,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:19,321 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2022-07-12 19:09:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:09:19,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-12 19:09:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:19,325 INFO L225 Difference]: With dead ends: 129 [2022-07-12 19:09:19,325 INFO L226 Difference]: Without dead ends: 129 [2022-07-12 19:09:19,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:09:19,329 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 5 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:19,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 209 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:09:19,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-12 19:09:19,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-07-12 19:09:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 124 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2022-07-12 19:09:19,344 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 6 [2022-07-12 19:09:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:19,345 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2022-07-12 19:09:19,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:09:19,346 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2022-07-12 19:09:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 19:09:19,347 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:19,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:19,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 19:09:19,347 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:19,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:19,349 INFO L85 PathProgramCache]: Analyzing trace with hash -753542016, now seen corresponding path program 1 times [2022-07-12 19:09:19,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:19,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099523866] [2022-07-12 19:09:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:19,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:19,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:09:19,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099523866] [2022-07-12 19:09:19,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099523866] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:19,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:19,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 19:09:19,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194501775] [2022-07-12 19:09:19,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:19,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:09:19,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:09:19,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:09:19,473 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:09:19,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:19,571 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2022-07-12 19:09:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:09:19,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-12 19:09:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:19,573 INFO L225 Difference]: With dead ends: 140 [2022-07-12 19:09:19,573 INFO L226 Difference]: Without dead ends: 140 [2022-07-12 19:09:19,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:09:19,574 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 10 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:19,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 313 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:09:19,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-12 19:09:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2022-07-12 19:09:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 125 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:19,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2022-07-12 19:09:19,591 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 14 [2022-07-12 19:09:19,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:19,592 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2022-07-12 19:09:19,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:09:19,592 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2022-07-12 19:09:19,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 19:09:19,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:19,592 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:19,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 19:09:19,593 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:19,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:19,593 INFO L85 PathProgramCache]: Analyzing trace with hash 265974304, now seen corresponding path program 1 times [2022-07-12 19:09:19,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:19,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848092449] [2022-07-12 19:09:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:19,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:19,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:19,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:09:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 19:09:19,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:19,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848092449] [2022-07-12 19:09:19,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848092449] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:19,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:19,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 19:09:19,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166032589] [2022-07-12 19:09:19,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:19,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 19:09:19,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:19,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 19:09:19,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:09:19,673 INFO L87 Difference]: Start difference. First operand 130 states and 139 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:19,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:19,865 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2022-07-12 19:09:19,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:09:19,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-12 19:09:19,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:19,867 INFO L225 Difference]: With dead ends: 130 [2022-07-12 19:09:19,867 INFO L226 Difference]: Without dead ends: 130 [2022-07-12 19:09:19,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:09:19,868 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 21 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:19,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 426 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:09:19,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-12 19:09:19,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-07-12 19:09:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 68 states have (on average 1.9411764705882353) internal successors, (132), 124 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:19,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2022-07-12 19:09:19,872 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 24 [2022-07-12 19:09:19,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:19,872 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2022-07-12 19:09:19,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2022-07-12 19:09:19,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 19:09:19,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:19,873 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:19,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 19:09:19,874 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:19,874 INFO L85 PathProgramCache]: Analyzing trace with hash 265974305, now seen corresponding path program 1 times [2022-07-12 19:09:19,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:19,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514342982] [2022-07-12 19:09:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:19,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:19,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:19,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:09:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:20,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:20,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514342982] [2022-07-12 19:09:20,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514342982] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:20,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:20,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 19:09:20,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218030516] [2022-07-12 19:09:20,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:20,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 19:09:20,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:20,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 19:09:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:09:20,011 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:20,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:20,216 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2022-07-12 19:09:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:09:20,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-12 19:09:20,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:20,218 INFO L225 Difference]: With dead ends: 129 [2022-07-12 19:09:20,218 INFO L226 Difference]: Without dead ends: 129 [2022-07-12 19:09:20,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:09:20,219 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 19 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:20,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 450 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:09:20,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-12 19:09:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-07-12 19:09:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 123 states have internal predecessors, (131), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:20,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2022-07-12 19:09:20,223 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 24 [2022-07-12 19:09:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:20,223 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2022-07-12 19:09:20,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:20,224 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2022-07-12 19:09:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 19:09:20,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:20,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:20,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 19:09:20,225 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:20,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731903, now seen corresponding path program 1 times [2022-07-12 19:09:20,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:20,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465897232] [2022-07-12 19:09:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:20,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:20,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:20,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:09:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:20,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:20,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465897232] [2022-07-12 19:09:20,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465897232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:20,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519232889] [2022-07-12 19:09:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:20,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:09:20,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:09:20,330 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) [2022-07-12 19:09:20,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 19:09:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:20,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 19:09:20,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:20,447 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 [2022-07-12 19:09:20,536 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 19:09:20,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 19:09:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:09:20,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:20,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519232889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:20,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:09:20,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-07-12 19:09:20,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073049936] [2022-07-12 19:09:20,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:09:20,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 19:09:20,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:20,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 19:09:20,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-12 19:09:20,581 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:09:20,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:20,832 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2022-07-12 19:09:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:09:20,833 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-07-12 19:09:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:20,833 INFO L225 Difference]: With dead ends: 153 [2022-07-12 19:09:20,833 INFO L226 Difference]: Without dead ends: 153 [2022-07-12 19:09:20,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-12 19:09:20,834 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 111 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:20,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 404 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 453 Invalid, 0 Unknown, 4 Unchecked, 0.2s Time] [2022-07-12 19:09:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-12 19:09:20,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 133. [2022-07-12 19:09:20,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 127 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2022-07-12 19:09:20,837 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 26 [2022-07-12 19:09:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:20,837 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2022-07-12 19:09:20,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:09:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2022-07-12 19:09:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 19:09:20,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:20,838 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:20,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:21,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-12 19:09:21,048 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731902, now seen corresponding path program 1 times [2022-07-12 19:09:21,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:21,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318559906] [2022-07-12 19:09:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:21,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:21,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:21,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:09:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:21,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:21,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318559906] [2022-07-12 19:09:21,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318559906] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:21,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525621206] [2022-07-12 19:09:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:21,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:09:21,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:09:21,207 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) [2022-07-12 19:09:21,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 19:09:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:21,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 19:09:21,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:21,297 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 [2022-07-12 19:09:21,471 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 19:09:21,472 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 [2022-07-12 19:09:21,483 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:09:21,484 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 [2022-07-12 19:09:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:09:21,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:21,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525621206] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:21,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:09:21,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2022-07-12 19:09:21,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811496493] [2022-07-12 19:09:21,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:09:21,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 19:09:21,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:21,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 19:09:21,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-07-12 19:09:21,632 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 19:09:22,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:22,162 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2022-07-12 19:09:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 19:09:22,163 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-07-12 19:09:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:22,163 INFO L225 Difference]: With dead ends: 135 [2022-07-12 19:09:22,163 INFO L226 Difference]: Without dead ends: 135 [2022-07-12 19:09:22,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-07-12 19:09:22,164 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 3 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:22,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 986 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 828 Invalid, 0 Unknown, 166 Unchecked, 0.4s Time] [2022-07-12 19:09:22,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-12 19:09:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-07-12 19:09:22,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.8888888888888888) internal successors, (136), 127 states have internal predecessors, (136), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:22,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2022-07-12 19:09:22,167 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 26 [2022-07-12 19:09:22,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:22,167 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2022-07-12 19:09:22,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 19:09:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2022-07-12 19:09:22,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 19:09:22,167 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:22,167 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:22,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:22,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-12 19:09:22,368 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:22,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:22,369 INFO L85 PathProgramCache]: Analyzing trace with hash -619542825, now seen corresponding path program 1 times [2022-07-12 19:09:22,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:22,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574257503] [2022-07-12 19:09:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:22,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:22,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:22,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:09:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:22,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:22,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574257503] [2022-07-12 19:09:22,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574257503] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:22,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868791749] [2022-07-12 19:09:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:22,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:09:22,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:09:22,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 19:09:22,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 19:09:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:22,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 19:09:22,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:22,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:22,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868791749] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:09:22,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:09:22,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-07-12 19:09:22,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249633778] [2022-07-12 19:09:22,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:09:22,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 19:09:22,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:22,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 19:09:22,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:09:22,656 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:09:22,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:22,794 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2022-07-12 19:09:22,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:09:22,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-07-12 19:09:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:22,796 INFO L225 Difference]: With dead ends: 134 [2022-07-12 19:09:22,796 INFO L226 Difference]: Without dead ends: 134 [2022-07-12 19:09:22,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:09:22,797 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 4 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:22,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 660 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:09:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-12 19:09:22,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-07-12 19:09:22,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.875) internal successors, (135), 127 states have internal predecessors, (135), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2022-07-12 19:09:22,801 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 28 [2022-07-12 19:09:22,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:22,801 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2022-07-12 19:09:22,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:09:22,801 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2022-07-12 19:09:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 19:09:22,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:22,804 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:22,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 19:09:23,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:09:23,021 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:23,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:23,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739054, now seen corresponding path program 1 times [2022-07-12 19:09:23,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:23,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818653185] [2022-07-12 19:09:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:23,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:23,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:23,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:09:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:09:23,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:23,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818653185] [2022-07-12 19:09:23,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818653185] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:23,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731210011] [2022-07-12 19:09:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:23,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:09:23,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:09:23,112 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 19:09:23,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 19:09:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:23,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 19:09:23,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:09:23,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:23,234 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 19:09:23,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-12 19:09:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:09:23,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731210011] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:09:23,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:09:23,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2022-07-12 19:09:23,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508649084] [2022-07-12 19:09:23,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:09:23,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:09:23,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:23,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:09:23,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:09:23,251 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:09:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:23,394 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2022-07-12 19:09:23,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:09:23,394 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-07-12 19:09:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:23,395 INFO L225 Difference]: With dead ends: 138 [2022-07-12 19:09:23,395 INFO L226 Difference]: Without dead ends: 138 [2022-07-12 19:09:23,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:09:23,395 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 13 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:23,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 311 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:09:23,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-12 19:09:23,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2022-07-12 19:09:23,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8666666666666667) internal successors, (140), 130 states have internal predecessors, (140), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2022-07-12 19:09:23,398 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 29 [2022-07-12 19:09:23,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:23,398 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2022-07-12 19:09:23,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:09:23,398 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2022-07-12 19:09:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 19:09:23,399 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:23,399 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:23,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:23,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:09:23,607 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:23,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739053, now seen corresponding path program 1 times [2022-07-12 19:09:23,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:23,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6068112] [2022-07-12 19:09:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:23,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:23,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:23,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:09:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:23,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:23,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6068112] [2022-07-12 19:09:23,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6068112] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:23,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870084666] [2022-07-12 19:09:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:23,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:09:23,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:09:23,714 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 19:09:23,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 19:09:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:23,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 19:09:23,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:23,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:23,932 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:09:23,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-07-12 19:09:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:24,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870084666] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:09:24,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:09:24,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-07-12 19:09:24,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302649622] [2022-07-12 19:09:24,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:09:24,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 19:09:24,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:24,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 19:09:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-07-12 19:09:24,057 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 19:09:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:24,296 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2022-07-12 19:09:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 19:09:24,297 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-07-12 19:09:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:24,297 INFO L225 Difference]: With dead ends: 143 [2022-07-12 19:09:24,298 INFO L226 Difference]: Without dead ends: 143 [2022-07-12 19:09:24,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-07-12 19:09:24,298 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 28 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:24,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1352 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:09:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-12 19:09:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2022-07-12 19:09:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 130 states have internal predecessors, (139), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2022-07-12 19:09:24,301 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 29 [2022-07-12 19:09:24,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:24,301 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2022-07-12 19:09:24,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 19:09:24,301 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2022-07-12 19:09:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 19:09:24,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:24,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:24,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:24,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 19:09:24,512 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:24,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:24,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598771, now seen corresponding path program 1 times [2022-07-12 19:09:24,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:24,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684390758] [2022-07-12 19:09:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:24,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:24,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:24,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:09:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 19:09:24,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:24,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684390758] [2022-07-12 19:09:24,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684390758] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:24,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:24,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 19:09:24,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571256264] [2022-07-12 19:09:24,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:24,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 19:09:24,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:24,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 19:09:24,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:09:24,577 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:24,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:24,782 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2022-07-12 19:09:24,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 19:09:24,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-12 19:09:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:24,783 INFO L225 Difference]: With dead ends: 136 [2022-07-12 19:09:24,783 INFO L226 Difference]: Without dead ends: 136 [2022-07-12 19:09:24,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:09:24,784 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 23 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:24,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 475 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:09:24,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-12 19:09:24,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-07-12 19:09:24,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 75 states have (on average 1.84) internal successors, (138), 129 states have internal predecessors, (138), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:24,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2022-07-12 19:09:24,786 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 30 [2022-07-12 19:09:24,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:24,786 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2022-07-12 19:09:24,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:24,787 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2022-07-12 19:09:24,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 19:09:24,787 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:24,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:24,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 19:09:24,787 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:24,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:24,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598772, now seen corresponding path program 1 times [2022-07-12 19:09:24,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:24,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794129569] [2022-07-12 19:09:24,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:24,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:24,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:24,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:09:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:24,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:24,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794129569] [2022-07-12 19:09:24,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794129569] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:24,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:24,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 19:09:24,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745642160] [2022-07-12 19:09:24,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:24,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 19:09:24,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:24,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 19:09:24,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:09:24,868 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:25,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:25,114 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2022-07-12 19:09:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 19:09:25,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-12 19:09:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:25,115 INFO L225 Difference]: With dead ends: 134 [2022-07-12 19:09:25,115 INFO L226 Difference]: Without dead ends: 134 [2022-07-12 19:09:25,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:09:25,115 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 20 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:25,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 505 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:09:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-12 19:09:25,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-07-12 19:09:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 75 states have (on average 1.8266666666666667) internal successors, (137), 128 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2022-07-12 19:09:25,118 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 30 [2022-07-12 19:09:25,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:25,118 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2022-07-12 19:09:25,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2022-07-12 19:09:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 19:09:25,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:25,124 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:25,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 19:09:25,124 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:25,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:25,124 INFO L85 PathProgramCache]: Analyzing trace with hash 939320083, now seen corresponding path program 1 times [2022-07-12 19:09:25,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:25,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398493553] [2022-07-12 19:09:25,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:25,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:25,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:25,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:09:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:25,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 19:09:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 19:09:25,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:25,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398493553] [2022-07-12 19:09:25,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398493553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:25,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452702929] [2022-07-12 19:09:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:25,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:09:25,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:09:25,247 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 19:09:25,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 19:09:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:25,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:09:25,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:09:25,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:09:25,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452702929] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:25,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 19:09:25,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-07-12 19:09:25,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541409742] [2022-07-12 19:09:25,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:25,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:09:25,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:09:25,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:09:25,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:09:25,420 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:09:25,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:25,427 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-07-12 19:09:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:09:25,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-07-12 19:09:25,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:25,428 INFO L225 Difference]: With dead ends: 122 [2022-07-12 19:09:25,428 INFO L226 Difference]: Without dead ends: 122 [2022-07-12 19:09:25,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:09:25,429 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 107 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:25,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 153 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:09:25,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-12 19:09:25,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-07-12 19:09:25,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.8088235294117647) internal successors, (123), 117 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:25,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2022-07-12 19:09:25,432 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 41 [2022-07-12 19:09:25,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:25,432 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2022-07-12 19:09:25,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:09:25,432 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2022-07-12 19:09:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 19:09:25,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:25,435 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:25,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-12 19:09:25,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:09:25,652 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:25,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:25,652 INFO L85 PathProgramCache]: Analyzing trace with hash -566913869, now seen corresponding path program 1 times [2022-07-12 19:09:25,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:09:25,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570085222] [2022-07-12 19:09:25,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:25,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:09:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:25,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:09:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:25,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-12 19:09:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:25,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 19:09:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 19:09:25,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:09:25,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570085222] [2022-07-12 19:09:25,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570085222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:25,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141407016] [2022-07-12 19:09:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:25,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:09:25,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:09:25,817 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 19:09:25,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 19:09:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:25,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 19:09:25,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:25,974 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 [2022-07-12 19:09:25,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 19:09:26,095 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-12 19:09:26,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:26,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:09:26,296 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 91251 column 46: unknown constant v_#valid_BEFORE_CALL_6 at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript$DiffTransformer.checkOrAddAxiom(DiffWrapperScript.java:161) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript$DiffTransformer.convertApplicationTerm(DiffWrapperScript.java:171) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:352) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:285) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:109) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertTerm(ManagedScript.java:134) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:824) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:768) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-12 19:09:26,299 INFO L158 Benchmark]: Toolchain (without parser) took 8515.61ms. Allocated memory was 107.0MB in the beginning and 188.7MB in the end (delta: 81.8MB). Free memory was 76.1MB in the beginning and 157.9MB in the end (delta: -81.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 19:09:26,299 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 107.0MB. Free memory is still 63.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 19:09:26,299 INFO L158 Benchmark]: CACSL2BoogieTranslator took 400.61ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 75.9MB in the beginning and 95.0MB in the end (delta: -19.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-12 19:09:26,299 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.61ms. Allocated memory is still 130.0MB. Free memory was 94.7MB in the beginning and 92.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 19:09:26,299 INFO L158 Benchmark]: Boogie Preprocessor took 39.21ms. Allocated memory is still 130.0MB. Free memory was 92.6MB in the beginning and 90.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 19:09:26,300 INFO L158 Benchmark]: RCFGBuilder took 449.55ms. Allocated memory is still 130.0MB. Free memory was 90.5MB in the beginning and 102.9MB in the end (delta: -12.4MB). Peak memory consumption was 26.5MB. Max. memory is 16.1GB. [2022-07-12 19:09:26,300 INFO L158 Benchmark]: TraceAbstraction took 7570.98ms. Allocated memory was 130.0MB in the beginning and 188.7MB in the end (delta: 58.7MB). Free memory was 102.3MB in the beginning and 157.9MB in the end (delta: -55.6MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. [2022-07-12 19:09:26,301 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 107.0MB. Free memory is still 63.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 400.61ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 75.9MB in the beginning and 95.0MB in the end (delta: -19.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.61ms. Allocated memory is still 130.0MB. Free memory was 94.7MB in the beginning and 92.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.21ms. Allocated memory is still 130.0MB. Free memory was 92.6MB in the beginning and 90.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 449.55ms. Allocated memory is still 130.0MB. Free memory was 90.5MB in the beginning and 102.9MB in the end (delta: -12.4MB). Peak memory consumption was 26.5MB. Max. memory is 16.1GB. * TraceAbstraction took 7570.98ms. Allocated memory was 130.0MB in the beginning and 188.7MB in the end (delta: 58.7MB). Free memory was 102.3MB in the beginning and 157.9MB in the end (delta: -55.6MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 91251 column 46: unknown constant v_#valid_BEFORE_CALL_6 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 91251 column 46: unknown constant v_#valid_BEFORE_CALL_6: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-12 19:09:26,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 1 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2c_append_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9aabbeff87ba819b44dc608a3105d0ba81b71cd88693ecf2e6bf3860a7863e64 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 19:09:28,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 19:09:28,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 19:09:28,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 19:09:28,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 19:09:28,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 19:09:28,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 19:09:28,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 19:09:28,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 19:09:28,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 19:09:28,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 19:09:28,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 19:09:28,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 19:09:28,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 19:09:28,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 19:09:28,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 19:09:28,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 19:09:28,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 19:09:28,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 19:09:28,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 19:09:28,054 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 19:09:28,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 19:09:28,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 19:09:28,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 19:09:28,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 19:09:28,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 19:09:28,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 19:09:28,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 19:09:28,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 19:09:28,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 19:09:28,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 19:09:28,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 19:09:28,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 19:09:28,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 19:09:28,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 19:09:28,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 19:09:28,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 19:09:28,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 19:09:28,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 19:09:28,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 19:09:28,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 19:09:28,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 19:09:28,074 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-12 19:09:28,088 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 19:09:28,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 19:09:28,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 19:09:28,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 19:09:28,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 19:09:28,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 19:09:28,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 19:09:28,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 19:09:28,090 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 19:09:28,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 19:09:28,090 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 19:09:28,090 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 19:09:28,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 19:09:28,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 19:09:28,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 19:09:28,091 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 19:09:28,091 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 19:09:28,091 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 19:09:28,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 19:09:28,092 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 19:09:28,092 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 19:09:28,092 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 19:09:28,092 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 19:09:28,092 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 19:09:28,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 19:09:28,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 19:09:28,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 19:09:28,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:09:28,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 19:09:28,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 19:09:28,093 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 19:09:28,093 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 19:09:28,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 19:09:28,093 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aabbeff87ba819b44dc608a3105d0ba81b71cd88693ecf2e6bf3860a7863e64 [2022-07-12 19:09:28,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 19:09:28,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 19:09:28,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 19:09:28,360 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 19:09:28,360 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 19:09:28,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2022-07-12 19:09:28,411 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f92232107/467f420eeb424410bdd456d61ac64e62/FLAG109541cc7 [2022-07-12 19:09:28,825 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 19:09:28,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2022-07-12 19:09:28,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f92232107/467f420eeb424410bdd456d61ac64e62/FLAG109541cc7 [2022-07-12 19:09:29,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f92232107/467f420eeb424410bdd456d61ac64e62 [2022-07-12 19:09:29,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 19:09:29,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 19:09:29,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 19:09:29,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 19:09:29,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 19:09:29,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:09:29" (1/1) ... [2022-07-12 19:09:29,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70dfda63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:29, skipping insertion in model container [2022-07-12 19:09:29,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:09:29" (1/1) ... [2022-07-12 19:09:29,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 19:09:29,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 19:09:29,526 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2022-07-12 19:09:29,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:09:29,537 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 19:09:29,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2022-07-12 19:09:29,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:09:29,592 INFO L208 MainTranslator]: Completed translation [2022-07-12 19:09:29,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:29 WrapperNode [2022-07-12 19:09:29,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 19:09:29,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 19:09:29,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 19:09:29,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 19:09:29,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:29" (1/1) ... [2022-07-12 19:09:29,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:29" (1/1) ... [2022-07-12 19:09:29,647 INFO L137 Inliner]: procedures = 130, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 153 [2022-07-12 19:09:29,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 19:09:29,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 19:09:29,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 19:09:29,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 19:09:29,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:29" (1/1) ... [2022-07-12 19:09:29,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:29" (1/1) ... [2022-07-12 19:09:29,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:29" (1/1) ... [2022-07-12 19:09:29,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:29" (1/1) ... [2022-07-12 19:09:29,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:29" (1/1) ... [2022-07-12 19:09:29,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:29" (1/1) ... [2022-07-12 19:09:29,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:29" (1/1) ... [2022-07-12 19:09:29,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 19:09:29,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 19:09:29,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 19:09:29,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 19:09:29,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:29" (1/1) ... [2022-07-12 19:09:29,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:09:29,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:09:29,703 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) [2022-07-12 19:09:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-12 19:09:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-12 19:09:29,734 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-12 19:09:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 19:09:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 19:09:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 19:09:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 19:09:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 19:09:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 19:09:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-12 19:09:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 19:09:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-12 19:09:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 19:09:29,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 19:09:29,731 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 [2022-07-12 19:09:29,873 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 19:09:29,874 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 19:09:30,298 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 19:09:30,303 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 19:09:30,303 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 19:09:30,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:09:30 BoogieIcfgContainer [2022-07-12 19:09:30,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 19:09:30,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 19:09:30,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 19:09:30,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 19:09:30,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 07:09:29" (1/3) ... [2022-07-12 19:09:30,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bbf8c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:09:30, skipping insertion in model container [2022-07-12 19:09:30,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:09:29" (2/3) ... [2022-07-12 19:09:30,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bbf8c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:09:30, skipping insertion in model container [2022-07-12 19:09:30,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:09:30" (3/3) ... [2022-07-12 19:09:30,314 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_append_unequal.i [2022-07-12 19:09:30,324 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 19:09:30,325 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2022-07-12 19:09:30,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 19:09:30,356 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@47da3d0c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@981d16c [2022-07-12 19:09:30,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2022-07-12 19:09:30,359 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 19:09:30,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:30,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 19:09:30,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:30,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:30,371 INFO L85 PathProgramCache]: Analyzing trace with hash 895672562, now seen corresponding path program 1 times [2022-07-12 19:09:30,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:30,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138536976] [2022-07-12 19:09:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:30,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:30,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:30,383 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:30,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 19:09:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:30,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 19:09:30,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:30,526 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 [2022-07-12 19:09:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:09:30,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:09:30,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:30,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138536976] [2022-07-12 19:09:30,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138536976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:30,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:30,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:09:30,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695814371] [2022-07-12 19:09:30,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:30,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:09:30,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:30,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:09:30,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:09:30,575 INFO L87 Difference]: Start difference. First operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:09:30,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:30,756 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2022-07-12 19:09:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:09:30,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-12 19:09:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:30,763 INFO L225 Difference]: With dead ends: 135 [2022-07-12 19:09:30,763 INFO L226 Difference]: Without dead ends: 132 [2022-07-12 19:09:30,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:09:30,766 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:30,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 207 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:09:30,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-12 19:09:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-07-12 19:09:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 67 states have (on average 2.014925373134328) internal successors, (135), 127 states have internal predecessors, (135), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2022-07-12 19:09:30,819 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 6 [2022-07-12 19:09:30,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:30,820 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2022-07-12 19:09:30,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:09:30,820 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2022-07-12 19:09:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 19:09:30,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:30,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 19:09:30,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:31,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:31,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:31,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:31,031 INFO L85 PathProgramCache]: Analyzing trace with hash 895672563, now seen corresponding path program 1 times [2022-07-12 19:09:31,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:31,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608304408] [2022-07-12 19:09:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:31,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:31,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:31,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:31,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 19:09:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:31,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 19:09:31,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:31,157 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 [2022-07-12 19:09:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:09:31,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:09:31,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608304408] [2022-07-12 19:09:31,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608304408] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:31,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:31,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:09:31,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886070376] [2022-07-12 19:09:31,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:31,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:09:31,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:09:31,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:09:31,172 INFO L87 Difference]: Start difference. First operand 132 states and 141 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:09:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:31,349 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2022-07-12 19:09:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:09:31,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-12 19:09:31,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:31,351 INFO L225 Difference]: With dead ends: 129 [2022-07-12 19:09:31,351 INFO L226 Difference]: Without dead ends: 129 [2022-07-12 19:09:31,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:09:31,352 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 5 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:31,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 209 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:09:31,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-12 19:09:31,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-07-12 19:09:31,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 124 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2022-07-12 19:09:31,357 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 6 [2022-07-12 19:09:31,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:31,357 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2022-07-12 19:09:31,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:09:31,357 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2022-07-12 19:09:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 19:09:31,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:31,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:31,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:31,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:31,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:31,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:31,565 INFO L85 PathProgramCache]: Analyzing trace with hash -753542016, now seen corresponding path program 1 times [2022-07-12 19:09:31,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:31,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557696359] [2022-07-12 19:09:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:31,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:31,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:31,568 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:31,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 19:09:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:31,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 19:09:31,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:09:31,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:09:31,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:31,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557696359] [2022-07-12 19:09:31,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557696359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:31,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:31,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:09:31,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596452972] [2022-07-12 19:09:31,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:31,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:09:31,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:31,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:09:31,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:09:31,652 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:09:31,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:31,663 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2022-07-12 19:09:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:09:31,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-12 19:09:31,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:31,666 INFO L225 Difference]: With dead ends: 140 [2022-07-12 19:09:31,666 INFO L226 Difference]: Without dead ends: 140 [2022-07-12 19:09:31,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:09:31,668 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 10 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:31,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 269 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:09:31,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-12 19:09:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2022-07-12 19:09:31,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 125 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2022-07-12 19:09:31,680 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 14 [2022-07-12 19:09:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:31,680 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2022-07-12 19:09:31,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:09:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2022-07-12 19:09:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 19:09:31,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:31,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:31,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-12 19:09:31,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:31,889 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:31,891 INFO L85 PathProgramCache]: Analyzing trace with hash 265974304, now seen corresponding path program 1 times [2022-07-12 19:09:31,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:31,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629966028] [2022-07-12 19:09:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:31,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:31,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:31,894 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:31,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 19:09:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:31,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 19:09:31,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:32,004 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 [2022-07-12 19:09:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:32,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:09:32,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:32,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629966028] [2022-07-12 19:09:32,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629966028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:32,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:32,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 19:09:32,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356417402] [2022-07-12 19:09:32,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:32,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:09:32,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:32,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:09:32,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:09:32,042 INFO L87 Difference]: Start difference. First operand 130 states and 139 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:32,414 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2022-07-12 19:09:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:09:32,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-12 19:09:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:32,416 INFO L225 Difference]: With dead ends: 130 [2022-07-12 19:09:32,416 INFO L226 Difference]: Without dead ends: 130 [2022-07-12 19:09:32,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:09:32,417 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 20 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:32,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 386 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 19:09:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-12 19:09:32,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-07-12 19:09:32,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 68 states have (on average 1.9411764705882353) internal successors, (132), 124 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2022-07-12 19:09:32,422 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 24 [2022-07-12 19:09:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:32,422 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2022-07-12 19:09:32,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2022-07-12 19:09:32,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 19:09:32,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:32,424 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:32,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-12 19:09:32,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:32,632 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:32,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:32,633 INFO L85 PathProgramCache]: Analyzing trace with hash 265974305, now seen corresponding path program 1 times [2022-07-12 19:09:32,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:32,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854563602] [2022-07-12 19:09:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:32,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:32,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:32,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:32,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-12 19:09:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:32,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 19:09:32,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:32,759 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 [2022-07-12 19:09:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:32,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:09:32,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:32,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854563602] [2022-07-12 19:09:32,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854563602] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:32,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:32,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 19:09:32,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049859018] [2022-07-12 19:09:32,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:32,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:09:32,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:32,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:09:32,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:09:32,846 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:33,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:33,246 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2022-07-12 19:09:33,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:09:33,246 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-12 19:09:33,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:33,247 INFO L225 Difference]: With dead ends: 129 [2022-07-12 19:09:33,247 INFO L226 Difference]: Without dead ends: 129 [2022-07-12 19:09:33,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:09:33,248 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 19 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:33,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 410 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 19:09:33,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-12 19:09:33,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-07-12 19:09:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 123 states have internal predecessors, (131), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2022-07-12 19:09:33,252 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 24 [2022-07-12 19:09:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:33,252 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2022-07-12 19:09:33,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2022-07-12 19:09:33,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 19:09:33,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:33,253 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:33,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:33,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:33,453 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:33,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:33,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731903, now seen corresponding path program 1 times [2022-07-12 19:09:33,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:33,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724363957] [2022-07-12 19:09:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:33,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:33,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:33,455 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:33,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-12 19:09:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:33,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 19:09:33,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:33,558 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 [2022-07-12 19:09:33,708 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:09:33,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-12 19:09:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:09:33,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:09:33,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:33,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724363957] [2022-07-12 19:09:33,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724363957] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:09:33,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:09:33,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-12 19:09:33,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780813607] [2022-07-12 19:09:33,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:09:33,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 19:09:33,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:33,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 19:09:33,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-12 19:09:33,893 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:09:34,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:34,263 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2022-07-12 19:09:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:09:34,264 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-07-12 19:09:34,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:34,264 INFO L225 Difference]: With dead ends: 135 [2022-07-12 19:09:34,264 INFO L226 Difference]: Without dead ends: 135 [2022-07-12 19:09:34,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-12 19:09:34,265 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 5 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:34,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 496 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 328 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-07-12 19:09:34,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-12 19:09:34,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-07-12 19:09:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 127 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2022-07-12 19:09:34,269 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 26 [2022-07-12 19:09:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:34,269 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2022-07-12 19:09:34,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:09:34,269 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2022-07-12 19:09:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 19:09:34,270 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:34,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:34,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-12 19:09:34,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:34,478 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:34,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:34,478 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731902, now seen corresponding path program 1 times [2022-07-12 19:09:34,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:34,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665953500] [2022-07-12 19:09:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:34,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:34,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:34,480 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:34,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-12 19:09:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:34,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 19:09:34,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:34,593 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 [2022-07-12 19:09:34,605 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 [2022-07-12 19:09:34,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:09:34,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 19:09:34,796 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:09:34,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 19:09:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:09:34,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:37,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:37,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665953500] [2022-07-12 19:09:37,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665953500] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:37,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [349934481] [2022-07-12 19:09:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:37,074 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:09:37,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:09:37,076 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:09:37,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-07-12 19:09:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:37,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 19:09:37,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:37,312 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 [2022-07-12 19:09:37,317 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 [2022-07-12 19:09:37,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:09:37,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 19:09:37,456 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:09:37,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 19:09:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:09:37,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:39,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [349934481] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:39,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:09:39,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-12 19:09:39,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817147589] [2022-07-12 19:09:39,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:09:39,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 19:09:39,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:39,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 19:09:39,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-12 19:09:39,615 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:09:40,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:40,166 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2022-07-12 19:09:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 19:09:40,167 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-12 19:09:40,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:40,167 INFO L225 Difference]: With dead ends: 135 [2022-07-12 19:09:40,167 INFO L226 Difference]: Without dead ends: 135 [2022-07-12 19:09:40,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-12 19:09:40,168 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 3 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:40,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 436 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 411 Invalid, 0 Unknown, 83 Unchecked, 0.5s Time] [2022-07-12 19:09:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-12 19:09:40,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-07-12 19:09:40,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.8888888888888888) internal successors, (136), 127 states have internal predecessors, (136), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:40,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2022-07-12 19:09:40,171 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 26 [2022-07-12 19:09:40,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:40,172 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2022-07-12 19:09:40,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:09:40,172 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2022-07-12 19:09:40,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 19:09:40,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:40,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:40,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:40,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-12 19:09:40,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:40,573 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:40,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:40,573 INFO L85 PathProgramCache]: Analyzing trace with hash -619542825, now seen corresponding path program 1 times [2022-07-12 19:09:40,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:40,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929577994] [2022-07-12 19:09:40,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:40,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:40,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:40,575 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:40,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-12 19:09:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:40,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:09:40,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:40,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:40,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:40,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929577994] [2022-07-12 19:09:40,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929577994] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:09:40,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:09:40,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-12 19:09:40,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281577199] [2022-07-12 19:09:40,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:09:40,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:09:40,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:40,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:09:40,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:09:40,743 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:09:40,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:40,854 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2022-07-12 19:09:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:09:40,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-07-12 19:09:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:40,855 INFO L225 Difference]: With dead ends: 134 [2022-07-12 19:09:40,855 INFO L226 Difference]: Without dead ends: 134 [2022-07-12 19:09:40,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:09:40,855 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 4 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:40,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 620 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:09:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-12 19:09:40,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-07-12 19:09:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.875) internal successors, (135), 127 states have internal predecessors, (135), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2022-07-12 19:09:40,858 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 28 [2022-07-12 19:09:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:40,858 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2022-07-12 19:09:40,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:09:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2022-07-12 19:09:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 19:09:40,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:40,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:40,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:41,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:41,066 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:41,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:41,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739054, now seen corresponding path program 1 times [2022-07-12 19:09:41,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:41,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58592883] [2022-07-12 19:09:41,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:41,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:41,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:41,069 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:41,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-12 19:09:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:41,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 19:09:41,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:09:41,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:41,220 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 19:09:41,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-12 19:09:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:09:41,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:41,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58592883] [2022-07-12 19:09:41,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58592883] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:09:41,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:09:41,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-12 19:09:41,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962735685] [2022-07-12 19:09:41,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:09:41,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:09:41,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:41,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:09:41,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:09:41,243 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:09:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:41,449 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2022-07-12 19:09:41,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:09:41,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-07-12 19:09:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:41,451 INFO L225 Difference]: With dead ends: 138 [2022-07-12 19:09:41,451 INFO L226 Difference]: Without dead ends: 138 [2022-07-12 19:09:41,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:09:41,451 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 9 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:41,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 320 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:09:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-12 19:09:41,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2022-07-12 19:09:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8666666666666667) internal successors, (140), 130 states have internal predecessors, (140), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2022-07-12 19:09:41,454 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 29 [2022-07-12 19:09:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:41,454 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2022-07-12 19:09:41,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:09:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2022-07-12 19:09:41,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 19:09:41,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:41,455 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:41,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:41,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:41,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:41,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739053, now seen corresponding path program 1 times [2022-07-12 19:09:41,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:41,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171177066] [2022-07-12 19:09:41,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:41,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:41,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:41,660 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:41,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-12 19:09:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:41,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 19:09:41,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:41,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:41,928 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:09:41,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-07-12 19:09:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:42,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:42,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171177066] [2022-07-12 19:09:42,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171177066] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:09:42,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:09:42,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-12 19:09:42,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610277258] [2022-07-12 19:09:42,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:09:42,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 19:09:42,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:42,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 19:09:42,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-12 19:09:42,223 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 19:09:42,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:42,826 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2022-07-12 19:09:42,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 19:09:42,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-07-12 19:09:42,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:42,827 INFO L225 Difference]: With dead ends: 143 [2022-07-12 19:09:42,827 INFO L226 Difference]: Without dead ends: 143 [2022-07-12 19:09:42,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-12 19:09:42,828 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 24 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:42,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 931 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 19:09:42,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-12 19:09:42,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2022-07-12 19:09:42,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 130 states have internal predecessors, (139), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2022-07-12 19:09:42,830 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 29 [2022-07-12 19:09:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:42,831 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2022-07-12 19:09:42,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 19:09:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2022-07-12 19:09:42,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 19:09:42,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:42,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:42,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:43,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:43,039 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:43,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:43,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598771, now seen corresponding path program 1 times [2022-07-12 19:09:43,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:43,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723299167] [2022-07-12 19:09:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:43,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:43,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:43,040 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:43,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-12 19:09:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:43,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 19:09:43,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:43,163 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 [2022-07-12 19:09:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:43,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:09:43,203 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:43,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723299167] [2022-07-12 19:09:43,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723299167] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:43,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:43,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 19:09:43,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710699760] [2022-07-12 19:09:43,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:43,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 19:09:43,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:43,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 19:09:43,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:09:43,205 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:43,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:43,654 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2022-07-12 19:09:43,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:09:43,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-12 19:09:43,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:43,655 INFO L225 Difference]: With dead ends: 136 [2022-07-12 19:09:43,655 INFO L226 Difference]: Without dead ends: 136 [2022-07-12 19:09:43,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-12 19:09:43,656 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 22 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:43,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 436 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 19:09:43,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-12 19:09:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-07-12 19:09:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 75 states have (on average 1.84) internal successors, (138), 129 states have internal predecessors, (138), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:43,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2022-07-12 19:09:43,658 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 30 [2022-07-12 19:09:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:43,658 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2022-07-12 19:09:43,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:43,659 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2022-07-12 19:09:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 19:09:43,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:43,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:43,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:43,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:43,860 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:43,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:43,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598772, now seen corresponding path program 1 times [2022-07-12 19:09:43,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:43,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978934900] [2022-07-12 19:09:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:43,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:43,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:43,862 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:43,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-12 19:09:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:44,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 19:09:44,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:44,026 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 [2022-07-12 19:09:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:44,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:09:44,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:44,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978934900] [2022-07-12 19:09:44,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978934900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:09:44,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:09:44,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 19:09:44,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359195125] [2022-07-12 19:09:44,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:09:44,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 19:09:44,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:44,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 19:09:44,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:09:44,107 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:44,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:44,583 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2022-07-12 19:09:44,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:09:44,584 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-12 19:09:44,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:44,585 INFO L225 Difference]: With dead ends: 134 [2022-07-12 19:09:44,585 INFO L226 Difference]: Without dead ends: 134 [2022-07-12 19:09:44,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-12 19:09:44,586 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 20 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:44,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 466 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 19:09:44,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-12 19:09:44,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-07-12 19:09:44,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 75 states have (on average 1.8266666666666667) internal successors, (137), 128 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:09:44,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2022-07-12 19:09:44,588 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 30 [2022-07-12 19:09:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:44,588 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2022-07-12 19:09:44,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:09:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2022-07-12 19:09:44,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 19:09:44,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:44,589 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:44,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:44,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:44,790 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:44,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:44,790 INFO L85 PathProgramCache]: Analyzing trace with hash 939320083, now seen corresponding path program 1 times [2022-07-12 19:09:44,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:44,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370218965] [2022-07-12 19:09:44,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:44,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:44,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:44,792 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:44,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-12 19:09:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:44,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:09:44,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:09:44,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 19:09:45,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:45,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370218965] [2022-07-12 19:09:45,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370218965] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:09:45,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:09:45,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-12 19:09:45,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77307383] [2022-07-12 19:09:45,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:09:45,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:09:45,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:45,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:09:45,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:09:45,007 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 19:09:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:45,027 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-07-12 19:09:45,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:09:45,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-07-12 19:09:45,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:45,031 INFO L225 Difference]: With dead ends: 122 [2022-07-12 19:09:45,032 INFO L226 Difference]: Without dead ends: 122 [2022-07-12 19:09:45,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:09:45,033 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 321 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:45,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 259 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:09:45,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-12 19:09:45,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-07-12 19:09:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.8088235294117647) internal successors, (123), 117 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:45,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2022-07-12 19:09:45,037 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 41 [2022-07-12 19:09:45,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:45,037 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2022-07-12 19:09:45,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 19:09:45,038 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2022-07-12 19:09:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 19:09:45,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:45,041 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:45,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:45,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:45,248 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:45,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash -566913869, now seen corresponding path program 1 times [2022-07-12 19:09:45,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:45,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268739542] [2022-07-12 19:09:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:45,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:45,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:45,250 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:45,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-12 19:09:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:45,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 19:09:45,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:45,469 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 [2022-07-12 19:09:45,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 19:09:45,565 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:09:45,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-12 19:09:45,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 19:09:45,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:09:45,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 19:09:45,795 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 19:09:45,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-12 19:09:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:09:45,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:46,125 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:09:46,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268739542] [2022-07-12 19:09:46,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268739542] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:46,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1121407779] [2022-07-12 19:09:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:46,125 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:09:46,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:09:46,127 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:09:46,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-07-12 19:09:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:46,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 19:09:46,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:46,419 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 19:09:46,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-12 19:09:46,452 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 19:09:46,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 19:09:46,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:09:46,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:09:46,542 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-12 19:09:46,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 31 [2022-07-12 19:09:46,619 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 19:09:46,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2022-07-12 19:09:46,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:09:46,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:09:46,799 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-12 19:09:46,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 40 [2022-07-12 19:09:47,100 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 19:09:47,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2022-07-12 19:09:47,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:09:47,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:09:47,170 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-12 19:09:47,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 40 [2022-07-12 19:09:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 19:09:47,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:09:47,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1121407779] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:09:47,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:09:47,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2022-07-12 19:09:47,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65413544] [2022-07-12 19:09:47,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:09:47,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 19:09:47,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:09:47,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 19:09:47,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-07-12 19:09:47,317 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 19:09:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:09:58,402 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2022-07-12 19:09:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 19:09:58,402 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-07-12 19:09:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:09:58,403 INFO L225 Difference]: With dead ends: 129 [2022-07-12 19:09:58,403 INFO L226 Difference]: Without dead ends: 129 [2022-07-12 19:09:58,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-07-12 19:09:58,403 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 17 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 19:09:58,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 841 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 318 Invalid, 0 Unknown, 514 Unchecked, 0.5s Time] [2022-07-12 19:09:58,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-12 19:09:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-07-12 19:09:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 75 states have (on average 1.72) internal successors, (129), 123 states have internal predecessors, (129), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:09:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2022-07-12 19:09:58,406 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 43 [2022-07-12 19:09:58,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:09:58,406 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2022-07-12 19:09:58,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 19:09:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2022-07-12 19:09:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 19:09:58,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:09:58,407 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:09:58,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-07-12 19:09:58,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-12 19:09:58,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:09:58,808 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:09:58,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:09:58,808 INFO L85 PathProgramCache]: Analyzing trace with hash -566913868, now seen corresponding path program 1 times [2022-07-12 19:09:58,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:09:58,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165347322] [2022-07-12 19:09:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:09:58,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:09:58,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:09:58,810 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:09:58,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-12 19:09:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:09:59,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 19:09:59,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:09:59,051 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 [2022-07-12 19:09:59,057 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 [2022-07-12 19:09:59,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 19:09:59,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 19:10:01,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:01,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 19:10:01,178 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:10:01,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 19:10:01,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 19:10:03,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:03,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 19:10:03,534 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 19:10:03,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-12 19:10:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:10:03,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:03,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:03,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165347322] [2022-07-12 19:10:03,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165347322] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:03,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1143589115] [2022-07-12 19:10:03,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:03,843 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:10:03,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:10:03,844 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:10:03,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-07-12 19:10:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:04,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 19:10:04,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:04,173 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 [2022-07-12 19:10:04,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 19:10:04,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:04,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 19:10:04,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 19:10:06,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:06,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 19:10:06,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 19:10:06,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:06,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 19:10:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 19:10:06,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:07,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1143589115] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:07,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:07,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-07-12 19:10:07,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841350249] [2022-07-12 19:10:07,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:07,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 19:10:07,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:07,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 19:10:07,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=434, Unknown=3, NotChecked=0, Total=506 [2022-07-12 19:10:07,165 INFO L87 Difference]: Start difference. First operand 129 states and 135 transitions. Second operand has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 19:10:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:09,959 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2022-07-12 19:10:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 19:10:09,959 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-07-12 19:10:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:09,960 INFO L225 Difference]: With dead ends: 128 [2022-07-12 19:10:09,960 INFO L226 Difference]: Without dead ends: 128 [2022-07-12 19:10:09,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=112, Invalid=696, Unknown=4, NotChecked=0, Total=812 [2022-07-12 19:10:09,984 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 21 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:09,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 655 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 206 Invalid, 0 Unknown, 342 Unchecked, 0.4s Time] [2022-07-12 19:10:09,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-12 19:10:09,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-07-12 19:10:09,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 75 states have (on average 1.7066666666666668) internal successors, (128), 122 states have internal predecessors, (128), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2022-07-12 19:10:09,989 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 43 [2022-07-12 19:10:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:09,989 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2022-07-12 19:10:09,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 19:10:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2022-07-12 19:10:09,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 19:10:09,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:09,991 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:09,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:10,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:10,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:10,395 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:10:10,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:10,395 INFO L85 PathProgramCache]: Analyzing trace with hash 656619060, now seen corresponding path program 1 times [2022-07-12 19:10:10,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:10,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822044454] [2022-07-12 19:10:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:10,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:10,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:10,397 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:10,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-12 19:10:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:10,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 19:10:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:10,585 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 [2022-07-12 19:10:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 19:10:10,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:10,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:10,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822044454] [2022-07-12 19:10:10,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822044454] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:10,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:10,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 19:10:10,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67976026] [2022-07-12 19:10:10,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:10,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:10:10,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:10,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:10:10,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:10:10,613 INFO L87 Difference]: Start difference. First operand 128 states and 134 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:10:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:10,981 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2022-07-12 19:10:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:10:10,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-12 19:10:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:10,982 INFO L225 Difference]: With dead ends: 142 [2022-07-12 19:10:10,982 INFO L226 Difference]: Without dead ends: 142 [2022-07-12 19:10:10,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:10:10,983 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 91 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:10,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 271 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 19:10:10,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-12 19:10:10,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 124. [2022-07-12 19:10:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 75 states have (on average 1.6533333333333333) internal successors, (124), 118 states have internal predecessors, (124), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:10,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2022-07-12 19:10:10,985 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 45 [2022-07-12 19:10:10,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:10,985 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2022-07-12 19:10:10,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:10:10,985 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2022-07-12 19:10:10,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 19:10:10,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:10,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:10,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:11,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:11,194 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:10:11,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:11,194 INFO L85 PathProgramCache]: Analyzing trace with hash 656619061, now seen corresponding path program 1 times [2022-07-12 19:10:11,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:11,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208009444] [2022-07-12 19:10:11,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:11,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:11,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:11,196 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:11,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-12 19:10:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:11,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 19:10:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:11,388 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 [2022-07-12 19:10:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 19:10:11,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:11,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:11,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208009444] [2022-07-12 19:10:11,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208009444] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:11,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:11,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 19:10:11,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686875505] [2022-07-12 19:10:11,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:11,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:10:11,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:11,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:10:11,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:10:11,448 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:10:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:11,832 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2022-07-12 19:10:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:10:11,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-12 19:10:11,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:11,834 INFO L225 Difference]: With dead ends: 120 [2022-07-12 19:10:11,834 INFO L226 Difference]: Without dead ends: 120 [2022-07-12 19:10:11,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:10:11,835 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 91 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:11,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 282 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 19:10:11,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-12 19:10:11,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-12 19:10:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 75 states have (on average 1.6) internal successors, (120), 114 states have internal predecessors, (120), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:11,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2022-07-12 19:10:11,837 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 45 [2022-07-12 19:10:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:11,837 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2022-07-12 19:10:11,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:10:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2022-07-12 19:10:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 19:10:11,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:11,838 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:11,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:12,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:12,047 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:10:12,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:12,048 INFO L85 PathProgramCache]: Analyzing trace with hash 656619412, now seen corresponding path program 1 times [2022-07-12 19:10:12,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:12,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572263160] [2022-07-12 19:10:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:12,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:12,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:12,049 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:12,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-12 19:10:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:12,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 19:10:12,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 19:10:12,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:12,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:12,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572263160] [2022-07-12 19:10:12,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572263160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:12,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:12,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:10:12,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138775109] [2022-07-12 19:10:12,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:12,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:10:12,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:12,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:10:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:10:12,233 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:10:12,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:12,411 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2022-07-12 19:10:12,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:10:12,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-12 19:10:12,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:12,412 INFO L225 Difference]: With dead ends: 134 [2022-07-12 19:10:12,412 INFO L226 Difference]: Without dead ends: 134 [2022-07-12 19:10:12,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:10:12,413 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 81 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:12,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 103 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:10:12,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-12 19:10:12,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2022-07-12 19:10:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 75 states have (on average 1.5466666666666666) internal successors, (116), 110 states have internal predecessors, (116), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2022-07-12 19:10:12,415 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 45 [2022-07-12 19:10:12,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:12,415 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2022-07-12 19:10:12,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 19:10:12,415 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2022-07-12 19:10:12,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 19:10:12,415 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:12,415 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:12,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-07-12 19:10:12,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:12,621 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:10:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash 656619413, now seen corresponding path program 1 times [2022-07-12 19:10:12,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:12,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765582015] [2022-07-12 19:10:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:12,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:12,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:12,623 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:12,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-12 19:10:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:12,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:10:12,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 19:10:12,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:12,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:12,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765582015] [2022-07-12 19:10:12,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765582015] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:12,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:12,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 19:10:12,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647440554] [2022-07-12 19:10:12,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:12,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:10:12,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:12,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:10:12,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:10:12,840 INFO L87 Difference]: Start difference. First operand 116 states and 122 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:13,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:13,010 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2022-07-12 19:10:13,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:10:13,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-07-12 19:10:13,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:13,011 INFO L225 Difference]: With dead ends: 112 [2022-07-12 19:10:13,011 INFO L226 Difference]: Without dead ends: 112 [2022-07-12 19:10:13,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:10:13,012 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 166 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:13,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 130 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:10:13,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-12 19:10:13,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-07-12 19:10:13,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 75 states have (on average 1.4933333333333334) internal successors, (112), 106 states have internal predecessors, (112), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2022-07-12 19:10:13,014 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 45 [2022-07-12 19:10:13,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:13,014 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2022-07-12 19:10:13,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:13,014 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2022-07-12 19:10:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 19:10:13,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:13,014 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:13,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:13,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:13,223 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:10:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:13,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1119634675, now seen corresponding path program 1 times [2022-07-12 19:10:13,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:13,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535325472] [2022-07-12 19:10:13,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:13,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:13,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:13,225 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:13,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-12 19:10:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:13,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 19:10:13,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:13,548 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 [2022-07-12 19:10:13,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 19:10:13,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-07-12 19:10:14,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:14,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-12 19:10:14,040 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-12 19:10:14,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 36 [2022-07-12 19:10:14,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-07-12 19:10:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:14,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:14,389 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:14,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535325472] [2022-07-12 19:10:14,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535325472] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:14,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1209746965] [2022-07-12 19:10:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:14,390 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:10:14,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:10:14,391 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:10:14,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-07-12 19:10:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:14,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 19:10:14,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:14,828 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 [2022-07-12 19:10:15,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-07-12 19:10:15,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:15,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-12 19:10:15,425 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-12 19:10:15,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 36 [2022-07-12 19:10:15,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-07-12 19:10:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:15,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:15,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1209746965] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:15,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:15,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2022-07-12 19:10:15,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082897214] [2022-07-12 19:10:15,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:15,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 19:10:15,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:15,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 19:10:15,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=552, Unknown=5, NotChecked=0, Total=650 [2022-07-12 19:10:15,700 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand has 24 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 19:10:16,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:16,402 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2022-07-12 19:10:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 19:10:16,402 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-07-12 19:10:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:16,403 INFO L225 Difference]: With dead ends: 111 [2022-07-12 19:10:16,403 INFO L226 Difference]: Without dead ends: 111 [2022-07-12 19:10:16,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 67 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=894, Unknown=9, NotChecked=0, Total=1056 [2022-07-12 19:10:16,403 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 26 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:16,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 626 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 322 Invalid, 0 Unknown, 224 Unchecked, 0.5s Time] [2022-07-12 19:10:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-12 19:10:16,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-07-12 19:10:16,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 75 states have (on average 1.48) internal successors, (111), 105 states have internal predecessors, (111), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2022-07-12 19:10:16,406 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 46 [2022-07-12 19:10:16,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:16,406 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2022-07-12 19:10:16,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 19:10:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2022-07-12 19:10:16,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 19:10:16,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:16,406 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:16,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:16,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-12 19:10:16,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:16,807 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:10:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:16,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1119634674, now seen corresponding path program 1 times [2022-07-12 19:10:16,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:16,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819697926] [2022-07-12 19:10:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:16,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:16,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:16,809 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:16,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-12 19:10:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:17,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 19:10:17,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:17,172 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 [2022-07-12 19:10:17,180 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 [2022-07-12 19:10:17,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 19:10:17,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-07-12 19:10:17,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-12 19:10:17,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:17,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 19:10:17,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:17,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-07-12 19:10:17,860 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-12 19:10:17,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-12 19:10:17,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:17,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 19:10:17,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-12 19:10:17,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 19:10:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:18,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:18,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:18,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819697926] [2022-07-12 19:10:18,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819697926] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:18,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [719300811] [2022-07-12 19:10:18,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:18,890 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:10:18,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:10:18,891 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:10:18,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-07-12 19:10:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:19,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 19:10:19,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:19,423 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 [2022-07-12 19:10:19,430 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 [2022-07-12 19:10:20,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-07-12 19:10:20,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-12 19:10:20,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:20,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-07-12 19:10:20,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:20,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 19:10:20,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:20,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 19:10:20,356 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-12 19:10:20,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-12 19:10:20,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-12 19:10:20,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 19:10:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:20,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:20,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [719300811] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:20,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:20,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 26 [2022-07-12 19:10:20,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261374552] [2022-07-12 19:10:20,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:20,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 19:10:20,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:20,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 19:10:20,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=811, Unknown=7, NotChecked=0, Total=930 [2022-07-12 19:10:20,936 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 19:10:22,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:22,332 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2022-07-12 19:10:22,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 19:10:22,333 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-07-12 19:10:22,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:22,333 INFO L225 Difference]: With dead ends: 110 [2022-07-12 19:10:22,333 INFO L226 Difference]: Without dead ends: 110 [2022-07-12 19:10:22,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=183, Invalid=1288, Unknown=11, NotChecked=0, Total=1482 [2022-07-12 19:10:22,334 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 21 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:22,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 839 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 637 Invalid, 0 Unknown, 204 Unchecked, 0.9s Time] [2022-07-12 19:10:22,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-12 19:10:22,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-07-12 19:10:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 75 states have (on average 1.4666666666666666) internal successors, (110), 104 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2022-07-12 19:10:22,336 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 46 [2022-07-12 19:10:22,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:22,337 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2022-07-12 19:10:22,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 19:10:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2022-07-12 19:10:22,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 19:10:22,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:22,337 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:22,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:22,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:22,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:22,742 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:10:22,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:22,742 INFO L85 PathProgramCache]: Analyzing trace with hash 2067869774, now seen corresponding path program 1 times [2022-07-12 19:10:22,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:22,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739241365] [2022-07-12 19:10:22,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:22,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:22,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:22,743 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:22,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-12 19:10:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:23,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-12 19:10:23,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:23,164 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 [2022-07-12 19:10:23,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 19:10:23,593 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:10:23,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-07-12 19:10:23,602 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 19:10:23,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 19:10:23,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-12 19:10:23,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:23,955 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-12 19:10:23,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2022-07-12 19:10:23,993 INFO L356 Elim1Store]: treesize reduction 86, result has 36.3 percent of original size [2022-07-12 19:10:23,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 67 [2022-07-12 19:10:24,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:24,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 19:10:24,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 19:10:24,224 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:10:24,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 43 [2022-07-12 19:10:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:24,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:24,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:24,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739241365] [2022-07-12 19:10:24,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739241365] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:24,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [566427264] [2022-07-12 19:10:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:24,675 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:10:24,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:10:24,677 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:10:24,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-07-12 19:10:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:25,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-12 19:10:25,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:25,377 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 [2022-07-12 19:10:25,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 19:10:26,157 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:10:26,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 17 [2022-07-12 19:10:26,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-12 19:10:26,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:26,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 19:10:26,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:26,434 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-12 19:10:26,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2022-07-12 19:10:26,475 INFO L356 Elim1Store]: treesize reduction 86, result has 36.3 percent of original size [2022-07-12 19:10:26,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 67 [2022-07-12 19:10:26,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 19:10:26,957 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:10:26,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 31 [2022-07-12 19:10:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:27,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:27,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [566427264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:27,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:27,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 35 [2022-07-12 19:10:27,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314868392] [2022-07-12 19:10:27,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:27,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 19:10:27,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:27,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 19:10:27,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1475, Unknown=7, NotChecked=0, Total=1640 [2022-07-12 19:10:27,296 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 36 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 19:10:28,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:28,809 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2022-07-12 19:10:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 19:10:28,810 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2022-07-12 19:10:28,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:28,811 INFO L225 Difference]: With dead ends: 109 [2022-07-12 19:10:28,811 INFO L226 Difference]: Without dead ends: 109 [2022-07-12 19:10:28,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 11 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=257, Invalid=2282, Unknown=11, NotChecked=0, Total=2550 [2022-07-12 19:10:28,812 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 23 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:28,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 1009 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 587 Invalid, 0 Unknown, 360 Unchecked, 0.9s Time] [2022-07-12 19:10:28,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-12 19:10:28,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-07-12 19:10:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 75 states have (on average 1.4533333333333334) internal successors, (109), 103 states have internal predecessors, (109), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:28,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2022-07-12 19:10:28,814 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 48 [2022-07-12 19:10:28,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:28,814 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2022-07-12 19:10:28,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 19:10:28,814 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2022-07-12 19:10:28,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 19:10:28,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:28,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:28,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:29,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-07-12 19:10:29,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:29,215 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:10:29,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:29,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2067869775, now seen corresponding path program 1 times [2022-07-12 19:10:29,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:29,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726606093] [2022-07-12 19:10:29,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:29,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:29,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:29,217 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:29,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-12 19:10:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:29,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-12 19:10:29,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:29,590 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 [2022-07-12 19:10:29,596 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 [2022-07-12 19:10:29,919 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:10:29,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2022-07-12 19:10:29,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 19:10:30,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 19:10:30,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 19:10:30,520 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-12 19:10:30,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 44 [2022-07-12 19:10:30,529 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 19:10:30,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 19:10:30,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-12 19:10:30,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 19:10:30,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:30,896 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-12 19:10:30,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 64 [2022-07-12 19:10:30,923 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-12 19:10:30,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2022-07-12 19:10:30,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-12 19:10:30,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:30,962 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 19:10:30,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-12 19:10:31,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:10:31,247 INFO L356 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2022-07-12 19:10:31,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 56 [2022-07-12 19:10:31,273 INFO L356 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2022-07-12 19:10:31,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-07-12 19:10:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:10:31,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:32,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:32,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726606093] [2022-07-12 19:10:32,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726606093] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:32,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [618155654] [2022-07-12 19:10:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:32,375 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:10:32,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:10:32,376 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:10:32,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-07-12 19:10:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:32,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-12 19:10:32,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:32,988 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 [2022-07-12 19:10:32,993 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 [2022-07-12 19:10:33,408 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:10:33,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2022-07-12 19:10:33,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 19:10:34,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 19:10:34,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 19:10:34,651 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:10:34,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 35 [2022-07-12 19:10:34,660 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:10:34,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 19:10:34,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:34,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-12 19:10:34,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:34,983 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 19:10:34,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-12 19:10:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:35,004 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-12 19:10:35,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 64 [2022-07-12 19:10:35,032 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-12 19:10:35,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2022-07-12 19:10:35,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:35,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:10:35,502 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:10:35,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 47 [2022-07-12 19:10:35,528 INFO L356 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-07-12 19:10:35,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-07-12 19:10:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:10:35,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:36,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [618155654] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:36,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:36,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2022-07-12 19:10:36,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665882128] [2022-07-12 19:10:36,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:36,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 19:10:36,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:36,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 19:10:36,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1632, Unknown=5, NotChecked=0, Total=1806 [2022-07-12 19:10:36,134 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 38 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 31 states have internal predecessors, (60), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 19:10:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:37,865 INFO L93 Difference]: Finished difference Result 164 states and 174 transitions. [2022-07-12 19:10:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 19:10:37,866 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 31 states have internal predecessors, (60), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2022-07-12 19:10:37,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:37,867 INFO L225 Difference]: With dead ends: 164 [2022-07-12 19:10:37,867 INFO L226 Difference]: Without dead ends: 164 [2022-07-12 19:10:37,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 62 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=251, Invalid=2290, Unknown=9, NotChecked=0, Total=2550 [2022-07-12 19:10:37,868 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 103 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:37,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 847 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 527 Invalid, 0 Unknown, 269 Unchecked, 0.7s Time] [2022-07-12 19:10:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-12 19:10:37,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 108. [2022-07-12 19:10:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 75 states have (on average 1.44) internal successors, (108), 102 states have internal predecessors, (108), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2022-07-12 19:10:37,881 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 48 [2022-07-12 19:10:37,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:37,881 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2022-07-12 19:10:37,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 31 states have internal predecessors, (60), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 19:10:37,881 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2022-07-12 19:10:37,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 19:10:37,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:37,882 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:37,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-07-12 19:10:38,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:38,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 19:10:38,288 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:10:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:38,288 INFO L85 PathProgramCache]: Analyzing trace with hash -645963400, now seen corresponding path program 1 times [2022-07-12 19:10:38,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:38,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098345835] [2022-07-12 19:10:38,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:38,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:38,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:38,290 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:38,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-12 19:10:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:38,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 19:10:38,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 19:10:38,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:38,548 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:38,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098345835] [2022-07-12 19:10:38,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098345835] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:38,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:38,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:10:38,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526561331] [2022-07-12 19:10:38,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:38,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:10:38,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:38,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:10:38,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:10:38,549 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:38,715 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2022-07-12 19:10:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:10:38,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-07-12 19:10:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:38,716 INFO L225 Difference]: With dead ends: 123 [2022-07-12 19:10:38,716 INFO L226 Difference]: Without dead ends: 123 [2022-07-12 19:10:38,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:10:38,717 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 156 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:38,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 118 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:10:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-12 19:10:38,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2022-07-12 19:10:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 75 states have (on average 1.4) internal successors, (105), 99 states have internal predecessors, (105), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2022-07-12 19:10:38,719 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 49 [2022-07-12 19:10:38,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:38,719 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2022-07-12 19:10:38,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:38,719 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2022-07-12 19:10:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 19:10:38,719 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:38,719 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:38,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:38,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:38,920 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:10:38,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:38,920 INFO L85 PathProgramCache]: Analyzing trace with hash -645963399, now seen corresponding path program 1 times [2022-07-12 19:10:38,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:38,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106468424] [2022-07-12 19:10:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:38,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:38,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:38,922 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:38,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-12 19:10:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:39,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 19:10:39,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 19:10:39,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:39,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:39,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106468424] [2022-07-12 19:10:39,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106468424] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:39,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:39,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 19:10:39,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516016996] [2022-07-12 19:10:39,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:39,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:10:39,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:39,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:10:39,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:10:39,216 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:39,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:39,383 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2022-07-12 19:10:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:10:39,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-07-12 19:10:39,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:39,384 INFO L225 Difference]: With dead ends: 102 [2022-07-12 19:10:39,384 INFO L226 Difference]: Without dead ends: 102 [2022-07-12 19:10:39,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:10:39,384 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 138 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:39,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 120 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:10:39,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-12 19:10:39,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-07-12 19:10:39,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 75 states have (on average 1.36) internal successors, (102), 96 states have internal predecessors, (102), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2022-07-12 19:10:39,386 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 49 [2022-07-12 19:10:39,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:39,386 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2022-07-12 19:10:39,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:39,386 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2022-07-12 19:10:39,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 19:10:39,387 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:39,387 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:39,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:39,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:39,587 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:10:39,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:39,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1999432508, now seen corresponding path program 1 times [2022-07-12 19:10:39,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:39,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646073993] [2022-07-12 19:10:39,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:39,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:39,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:39,589 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:39,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-12 19:10:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:39,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 19:10:39,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:39,847 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 [2022-07-12 19:10:39,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 19:10:39,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-12 19:10:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 19:10:39,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:39,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:39,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646073993] [2022-07-12 19:10:39,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646073993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:39,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:39,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 19:10:39,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5463671] [2022-07-12 19:10:39,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:39,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 19:10:39,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:39,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 19:10:39,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:10:39,965 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 10 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:40,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:40,710 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2022-07-12 19:10:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 19:10:40,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-07-12 19:10:40,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:40,711 INFO L225 Difference]: With dead ends: 168 [2022-07-12 19:10:40,711 INFO L226 Difference]: Without dead ends: 168 [2022-07-12 19:10:40,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-07-12 19:10:40,711 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 353 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:40,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 373 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 19:10:40,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-12 19:10:40,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 105. [2022-07-12 19:10:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.3417721518987342) internal successors, (106), 99 states have internal predecessors, (106), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:40,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2022-07-12 19:10:40,714 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 51 [2022-07-12 19:10:40,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:40,714 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2022-07-12 19:10:40,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2022-07-12 19:10:40,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 19:10:40,715 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:40,715 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:40,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:40,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:40,924 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:10:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:40,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1999432509, now seen corresponding path program 1 times [2022-07-12 19:10:40,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:40,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534102241] [2022-07-12 19:10:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:40,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:40,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:40,936 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:40,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-12 19:10:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:41,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 19:10:41,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:41,229 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 [2022-07-12 19:10:41,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 19:10:41,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 19:10:41,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-12 19:10:41,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 19:10:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 19:10:41,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:10:41,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:41,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534102241] [2022-07-12 19:10:41,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534102241] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:10:41,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:10:41,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 19:10:41,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30051823] [2022-07-12 19:10:41,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:10:41,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 19:10:41,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:41,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 19:10:41,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:10:41,431 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 10 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:42,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:42,025 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2022-07-12 19:10:42,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 19:10:42,025 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-07-12 19:10:42,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:42,026 INFO L225 Difference]: With dead ends: 154 [2022-07-12 19:10:42,026 INFO L226 Difference]: Without dead ends: 154 [2022-07-12 19:10:42,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-12 19:10:42,027 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 310 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:42,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 388 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 19:10:42,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-12 19:10:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 107. [2022-07-12 19:10:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 81 states have (on average 1.3333333333333333) internal successors, (108), 101 states have internal predecessors, (108), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:42,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2022-07-12 19:10:42,029 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 51 [2022-07-12 19:10:42,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:42,029 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2022-07-12 19:10:42,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:10:42,030 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2022-07-12 19:10:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 19:10:42,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:42,030 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:42,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:42,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:42,240 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:10:42,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1604261226, now seen corresponding path program 1 times [2022-07-12 19:10:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:42,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349569715] [2022-07-12 19:10:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:42,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:42,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:42,242 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:42,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-12 19:10:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:42,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 19:10:42,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:42,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 19:10:42,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-07-12 19:10:43,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:43,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-07-12 19:10:43,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-12 19:10:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:10:43,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:43,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:43,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349569715] [2022-07-12 19:10:43,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349569715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:43,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2081614050] [2022-07-12 19:10:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:43,192 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:10:43,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:10:43,193 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:10:43,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-07-12 19:10:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:43,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 19:10:43,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:44,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-07-12 19:10:44,454 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2858 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_#res#1.base| v_ArrVal_2858) |c_#memory_$Pointer$.base|)) (not (= |c_#StackHeapBarrier| (_ bv4294967295 32))) (bvult |c_node_create_#res#1.base| |c_#StackHeapBarrier|)) is different from true [2022-07-12 19:10:44,490 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 19:10:44,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 21 [2022-07-12 19:10:44,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-12 19:10:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-07-12 19:10:44,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:44,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2081614050] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:44,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:10:44,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2022-07-12 19:10:44,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937012269] [2022-07-12 19:10:44,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:10:44,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 19:10:44,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:10:44,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 19:10:44,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1013, Unknown=26, NotChecked=66, Total=1260 [2022-07-12 19:10:44,714 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand has 33 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 28 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 19:10:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:10:45,635 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2022-07-12 19:10:45,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 19:10:45,636 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 28 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2022-07-12 19:10:45,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:10:45,636 INFO L225 Difference]: With dead ends: 114 [2022-07-12 19:10:45,636 INFO L226 Difference]: Without dead ends: 114 [2022-07-12 19:10:45,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=254, Invalid=1609, Unknown=33, NotChecked=84, Total=1980 [2022-07-12 19:10:45,637 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 53 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 19:10:45,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1087 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 344 Invalid, 0 Unknown, 253 Unchecked, 0.5s Time] [2022-07-12 19:10:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-12 19:10:45,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 98. [2022-07-12 19:10:45,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 92 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:10:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2022-07-12 19:10:45,651 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 53 [2022-07-12 19:10:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:10:45,652 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2022-07-12 19:10:45,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 28 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 19:10:45,652 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2022-07-12 19:10:45,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 19:10:45,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:10:45,652 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:10:45,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:45,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-12 19:10:46,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:10:46,059 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-12 19:10:46,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:10:46,060 INFO L85 PathProgramCache]: Analyzing trace with hash -696733545, now seen corresponding path program 1 times [2022-07-12 19:10:46,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:10:46,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457358919] [2022-07-12 19:10:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:46,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:10:46,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:10:46,061 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:10:46,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-12 19:10:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:46,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-12 19:10:46,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:46,494 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 [2022-07-12 19:10:46,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 19:10:46,562 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:10:46,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 19:10:46,608 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 [2022-07-12 19:10:46,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 19:10:46,939 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-12 19:10:46,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-07-12 19:10:46,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-12 19:10:46,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-07-12 19:10:47,247 INFO L356 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-07-12 19:10:47,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 41 [2022-07-12 19:10:47,255 INFO L356 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2022-07-12 19:10:47,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-12 19:10:47,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-12 19:10:47,279 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 19:10:47,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-12 19:10:47,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 19:10:47,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 19:10:47,714 INFO L356 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-07-12 19:10:47,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2022-07-12 19:10:47,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-12 19:10:47,811 INFO L356 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-07-12 19:10:47,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 51 [2022-07-12 19:10:47,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-07-12 19:10:47,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:10:47,943 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-12 19:10:47,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 47 [2022-07-12 19:10:48,053 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-12 19:10:48,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2022-07-12 19:10:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:10:48,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:10:48,205 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_2982) |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) (_ bv1 1)))) is different from false [2022-07-12 19:10:48,380 INFO L356 Elim1Store]: treesize reduction 5, result has 79.2 percent of original size [2022-07-12 19:10:48,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-12 19:10:48,405 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2980 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_dll_circular_append_#t~mem11#1.base| (select (select (store (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_#t~mem11#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_append_#t~mem11#1.offset|)) v_ArrVal_2980) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_2982) |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) is different from false [2022-07-12 19:10:48,413 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2980 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) v_ArrVal_2980) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_2982) |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|)))) is different from false [2022-07-12 19:10:48,429 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2980 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) v_ArrVal_2980) |c_ULTIMATE.start_dll_circular_append_#t~ret9#1.base| v_ArrVal_2982) |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|)))) is different from false [2022-07-12 19:10:48,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:10:48,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457358919] [2022-07-12 19:10:48,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457358919] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:10:48,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [241460368] [2022-07-12 19:10:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:10:48,654 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:10:48,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:10:48,656 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:10:48,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-07-12 19:10:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:10:49,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 19:10:49,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:10:49,476 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 [2022-07-12 19:10:49,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 19:10:50,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2022-07-12 19:10:50,562 INFO L356 Elim1Store]: treesize reduction 50, result has 41.2 percent of original size [2022-07-12 19:10:50,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 56 [2022-07-12 19:10:51,280 INFO L356 Elim1Store]: treesize reduction 50, result has 71.6 percent of original size [2022-07-12 19:10:51,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 218 [2022-07-12 19:10:52,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 19:10:55,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:10:55,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 19:11:39,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:11:39,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:11:40,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:11:40,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:11:42,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-12 19:11:42,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-07-12 19:11:42,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-12 19:11:42,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-07-12 19:11:42,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:11:43,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:11:43,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-12 19:11:43,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-07-12 19:11:43,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-12 19:11:43,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-07-12 19:11:43,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-12 19:11:43,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-07-12 19:11:43,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-12 19:11:43,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-07-12 19:11:44,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2022-07-12 19:11:44,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:11:45,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-07-12 19:11:45,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-07-12 19:11:45,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2022-07-12 19:11:47,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-07-12 19:11:47,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-07-12 19:11:47,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-07-12 19:11:47,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-07-12 19:11:47,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-07-12 19:11:51,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 39 [2022-07-12 19:11:51,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 39 [2022-07-12 19:11:51,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 38 [2022-07-12 19:11:51,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 38 [2022-07-12 19:11:52,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 34 [2022-07-12 19:11:52,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 34 [2022-07-12 19:11:52,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-07-12 19:11:52,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 43 [2022-07-12 19:11:53,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:11:55,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:11:55,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:11:56,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:11:56,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:11:57,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-07-12 19:11:57,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:11:58,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2022-07-12 19:11:59,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2022-07-12 19:11:59,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:11:59,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:11:59,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-12 19:11:59,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-12 19:12:01,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:02,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:02,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2022-07-12 19:12:02,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-07-12 19:12:02,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 33 [2022-07-12 19:12:03,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:03,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:05,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 42 [2022-07-12 19:12:05,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 42 [2022-07-12 19:12:05,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-07-12 19:12:05,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-07-12 19:12:05,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:06,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:12:07,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 33 [2022-07-12 19:12:07,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:07,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:08,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:08,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:08,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-07-12 19:12:09,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 34 [2022-07-12 19:12:09,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-12 19:12:09,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-12 19:12:09,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-12 19:12:09,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-12 19:12:09,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2022-07-12 19:12:09,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2022-07-12 19:12:09,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-07-12 19:12:09,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-07-12 19:12:10,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:10,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:10,798 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:11,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2022-07-12 19:12:11,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2022-07-12 19:12:11,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-07-12 19:12:11,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:13,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:13,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:13,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:13,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-12 19:12:13,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-07-12 19:12:13,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-12 19:12:13,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-07-12 19:12:13,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-12 19:12:14,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:15,756 INFO L356 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2022-07-12 19:12:15,756 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 43 treesize of output 31 [2022-07-12 19:12:16,135 INFO L356 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2022-07-12 19:12:16,135 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 44 treesize of output 32 [2022-07-12 19:12:18,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:19,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:12:19,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:20,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2022-07-12 19:12:20,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2022-07-12 19:12:20,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2022-07-12 19:12:20,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:12:21,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:23,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:12:23,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-07-12 19:12:23,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:25,311 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:25,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:25,385 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:25,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:26,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:12:26,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2022-07-12 19:12:27,070 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:28,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 34 [2022-07-12 19:12:28,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 36 [2022-07-12 19:12:28,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 36 [2022-07-12 19:12:28,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 36 [2022-07-12 19:12:28,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 36 [2022-07-12 19:12:30,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2022-07-12 19:12:31,227 INFO L356 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2022-07-12 19:12:31,227 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 45 treesize of output 33 [2022-07-12 19:12:31,423 INFO L356 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2022-07-12 19:12:31,423 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 44 treesize of output 32 [2022-07-12 19:12:31,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-07-12 19:12:32,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:32,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:32,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:32,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:35,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:35,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:12:38,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2022-07-12 19:12:38,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2022-07-12 19:12:39,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:12:39,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:12:41,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:12:41,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2022-07-12 19:12:41,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2022-07-12 19:12:42,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2022-07-12 19:12:42,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2022-07-12 19:12:45,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2022-07-12 19:12:45,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 32 [2022-07-12 19:12:45,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2022-07-12 19:12:45,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 36 [2022-07-12 19:12:45,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 32 [2022-07-12 19:12:45,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2022-07-12 19:12:46,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2022-07-12 19:12:46,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2022-07-12 19:12:47,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2022-07-12 19:12:47,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 34 [2022-07-12 19:12:48,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2022-07-12 19:12:48,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2022-07-12 19:12:48,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-07-12 19:12:48,860 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:48,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:12:52,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 32 [2022-07-12 19:12:52,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-07-12 19:12:53,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-07-12 19:12:53,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-07-12 19:12:53,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-07-12 19:12:53,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-07-12 19:12:53,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-07-12 19:12:54,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 32 [2022-07-12 19:12:54,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2022-07-12 19:12:54,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:12:57,771 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:12:57,771 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 79 treesize of output 75 [2022-07-12 19:12:57,912 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:12:57,912 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 79 treesize of output 75 [2022-07-12 19:12:58,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2022-07-12 19:12:58,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2022-07-12 19:12:58,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-07-12 19:12:58,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2022-07-12 19:12:58,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2022-07-12 19:12:59,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2022-07-12 19:12:59,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-07-12 19:12:59,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2022-07-12 19:13:03,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:13:03,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:13:04,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-07-12 19:13:04,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-07-12 19:13:04,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-07-12 19:13:05,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:13:05,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:13:06,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-07-12 19:13:07,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-12 19:13:07,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-12 19:13:07,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2022-07-12 19:13:08,637 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-12 19:13:08,637 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 87 treesize of output 69