./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.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/array-memsafety/cstrcat-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:17:42,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:17:42,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:17:42,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:17:42,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:17:42,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:17:42,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:17:42,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:17:42,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:17:42,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:17:42,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:17:42,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:17:42,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:17:42,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:17:42,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:17:42,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:17:42,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:17:42,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:17:42,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:17:42,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:17:42,222 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:17:42,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:17:42,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:17:42,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:17:42,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:17:42,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:17:42,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:17:42,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:17:42,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:17:42,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:17:42,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:17:42,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:17:42,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:17:42,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:17:42,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:17:42,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:17:42,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:17:42,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:17:42,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:17:42,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:17:42,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:17:42,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:17:42,240 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:17:42,264 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:17:42,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:17:42,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:17:42,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:17:42,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:17:42,265 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:17:42,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:17:42,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:17:42,266 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:17:42,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:17:42,267 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:17:42,267 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:17:42,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:17:42,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:17:42,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:17:42,268 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:17:42,268 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:17:42,268 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:17:42,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:17:42,269 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:17:42,269 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:17:42,270 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:17:42,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:17:42,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:17:42,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:17:42,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:17:42,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:17:42,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:17:42,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:17:42,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:17:42,271 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e [2022-07-12 18:17:42,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:17:42,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:17:42,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:17:42,492 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:17:42,492 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:17:42,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2022-07-12 18:17:42,546 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5214188a1/8538aee93c3e4ed8a04275902022b3fc/FLAG1017c89d0 [2022-07-12 18:17:43,023 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:17:43,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2022-07-12 18:17:43,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5214188a1/8538aee93c3e4ed8a04275902022b3fc/FLAG1017c89d0 [2022-07-12 18:17:43,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5214188a1/8538aee93c3e4ed8a04275902022b3fc [2022-07-12 18:17:43,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:17:43,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:17:43,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:17:43,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:17:43,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:17:43,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:17:43" (1/1) ... [2022-07-12 18:17:43,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dc6bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:43, skipping insertion in model container [2022-07-12 18:17:43,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:17:43" (1/1) ... [2022-07-12 18:17:43,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:17:43,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:17:43,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:17:43,733 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:17:43,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:17:43,798 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:17:43,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:43 WrapperNode [2022-07-12 18:17:43,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:17:43,800 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:17:43,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:17:43,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:17:43,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:43" (1/1) ... [2022-07-12 18:17:43,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:43" (1/1) ... [2022-07-12 18:17:43,834 INFO L137 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2022-07-12 18:17:43,834 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:17:43,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:17:43,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:17:43,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:17:43,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:43" (1/1) ... [2022-07-12 18:17:43,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:43" (1/1) ... [2022-07-12 18:17:43,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:43" (1/1) ... [2022-07-12 18:17:43,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:43" (1/1) ... [2022-07-12 18:17:43,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:43" (1/1) ... [2022-07-12 18:17:43,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:43" (1/1) ... [2022-07-12 18:17:43,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:43" (1/1) ... [2022-07-12 18:17:43,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:17:43,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:17:43,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:17:43,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:17:43,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:43" (1/1) ... [2022-07-12 18:17:43,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:17:43,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:43,899 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 18:17:43,901 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 18:17:43,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 18:17:43,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 18:17:43,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 18:17:43,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:17:43,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:17:43,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:17:43,999 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:17:44,000 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:17:44,235 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:17:44,258 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:17:44,258 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 18:17:44,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:17:44 BoogieIcfgContainer [2022-07-12 18:17:44,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:17:44,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:17:44,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:17:44,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:17:44,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:17:43" (1/3) ... [2022-07-12 18:17:44,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1330634f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:17:44, skipping insertion in model container [2022-07-12 18:17:44,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:43" (2/3) ... [2022-07-12 18:17:44,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1330634f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:17:44, skipping insertion in model container [2022-07-12 18:17:44,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:17:44" (3/3) ... [2022-07-12 18:17:44,271 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcat-alloca-2.i [2022-07-12 18:17:44,285 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:17:44,285 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-07-12 18:17:44,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:17:44,325 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@4254c8d7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@67048c9a [2022-07-12 18:17:44,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-07-12 18:17:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 43 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:17:44,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:44,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:44,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:44,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:44,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031098, now seen corresponding path program 1 times [2022-07-12 18:17:44,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:44,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009770322] [2022-07-12 18:17:44,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:44,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:44,514 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 18:17:44,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:44,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009770322] [2022-07-12 18:17:44,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009770322] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:44,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:44,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:17:44,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937805675] [2022-07-12 18:17:44,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:44,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:17:44,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:44,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:17:44,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:44,544 INFO L87 Difference]: Start difference. First operand has 44 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 43 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:44,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:44,676 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2022-07-12 18:17:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:44,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 18:17:44,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:44,685 INFO L225 Difference]: With dead ends: 124 [2022-07-12 18:17:44,685 INFO L226 Difference]: Without dead ends: 118 [2022-07-12 18:17:44,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:17:44,688 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 212 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:44,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 158 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:17:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-12 18:17:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 45. [2022-07-12 18:17:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.8) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-07-12 18:17:44,711 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 7 [2022-07-12 18:17:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:44,712 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-07-12 18:17:44,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-07-12 18:17:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:17:44,713 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:44,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:44,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 18:17:44,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:44,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033020, now seen corresponding path program 1 times [2022-07-12 18:17:44,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:44,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013832223] [2022-07-12 18:17:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:44,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:44,736 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 18:17:44,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:44,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013832223] [2022-07-12 18:17:44,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013832223] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:44,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:44,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:17:44,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066882755] [2022-07-12 18:17:44,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:44,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:17:44,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:44,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:17:44,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:17:44,739 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:44,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:44,756 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-07-12 18:17:44,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:17:44,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 18:17:44,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:44,758 INFO L225 Difference]: With dead ends: 46 [2022-07-12 18:17:44,758 INFO L226 Difference]: Without dead ends: 45 [2022-07-12 18:17:44,758 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 18:17:44,759 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:44,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:44,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-12 18:17:44,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-07-12 18:17:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:44,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-12 18:17:44,763 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2022-07-12 18:17:44,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:44,763 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-12 18:17:44,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-12 18:17:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:17:44,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:44,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:44,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 18:17:44,764 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:44,765 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-07-12 18:17:44,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:44,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114026942] [2022-07-12 18:17:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:44,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:44,797 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 18:17:44,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:44,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114026942] [2022-07-12 18:17:44,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114026942] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:44,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:44,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:17:44,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520502479] [2022-07-12 18:17:44,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:44,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:17:44,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:44,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:17:44,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:44,800 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:44,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:44,819 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2022-07-12 18:17:44,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:17:44,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 18:17:44,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:44,820 INFO L225 Difference]: With dead ends: 76 [2022-07-12 18:17:44,822 INFO L226 Difference]: Without dead ends: 76 [2022-07-12 18:17:44,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:44,823 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:44,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:44,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-12 18:17:44,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 46. [2022-07-12 18:17:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-07-12 18:17:44,827 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 8 [2022-07-12 18:17:44,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:44,827 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-07-12 18:17:44,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-07-12 18:17:44,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:17:44,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:44,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:44,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 18:17:44,829 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:44,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:44,829 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-07-12 18:17:44,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:44,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746408058] [2022-07-12 18:17:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:44,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:44,866 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 18:17:44,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:44,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746408058] [2022-07-12 18:17:44,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746408058] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:44,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:44,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:17:44,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571822752] [2022-07-12 18:17:44,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:44,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:17:44,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:44,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:17:44,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:44,869 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:44,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:44,911 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2022-07-12 18:17:44,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:44,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 18:17:44,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:44,914 INFO L225 Difference]: With dead ends: 82 [2022-07-12 18:17:44,915 INFO L226 Difference]: Without dead ends: 82 [2022-07-12 18:17:44,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:17:44,917 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 103 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:44,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 157 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:44,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-12 18:17:44,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 46. [2022-07-12 18:17:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-07-12 18:17:44,929 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 8 [2022-07-12 18:17:44,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:44,930 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-07-12 18:17:44,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:44,930 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-07-12 18:17:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:17:44,930 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:44,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:44,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 18:17:44,931 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:44,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:44,932 INFO L85 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2022-07-12 18:17:44,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:44,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805059052] [2022-07-12 18:17:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:44,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:44,972 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 18:17:44,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:44,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805059052] [2022-07-12 18:17:44,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805059052] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:44,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:44,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:17:44,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729477635] [2022-07-12 18:17:44,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:44,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:17:44,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:44,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:17:44,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:17:44,976 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:45,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:45,002 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-07-12 18:17:45,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:17:45,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 18:17:45,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:45,005 INFO L225 Difference]: With dead ends: 44 [2022-07-12 18:17:45,006 INFO L226 Difference]: Without dead ends: 44 [2022-07-12 18:17:45,006 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 18:17:45,014 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:45,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 36 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-12 18:17:45,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-12 18:17:45,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-07-12 18:17:45,018 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 8 [2022-07-12 18:17:45,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:45,018 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-07-12 18:17:45,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:45,018 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-07-12 18:17:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:17:45,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:45,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:45,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 18:17:45,022 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:45,022 INFO L85 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2022-07-12 18:17:45,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:45,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326049350] [2022-07-12 18:17:45,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:45,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:45,077 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 18:17:45,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:45,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326049350] [2022-07-12 18:17:45,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326049350] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:45,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:45,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:17:45,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291398882] [2022-07-12 18:17:45,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:45,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:17:45,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:45,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:17:45,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:45,079 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:45,138 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-07-12 18:17:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:17:45,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 18:17:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:45,139 INFO L225 Difference]: With dead ends: 77 [2022-07-12 18:17:45,139 INFO L226 Difference]: Without dead ends: 77 [2022-07-12 18:17:45,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 18:17:45,140 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:45,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:45,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-12 18:17:45,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 46. [2022-07-12 18:17:45,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-07-12 18:17:45,144 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 8 [2022-07-12 18:17:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:45,144 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-07-12 18:17:45,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-07-12 18:17:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:17:45,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:45,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:45,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 18:17:45,145 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:45,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:45,146 INFO L85 PathProgramCache]: Analyzing trace with hash 690580011, now seen corresponding path program 1 times [2022-07-12 18:17:45,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:45,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675241386] [2022-07-12 18:17:45,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:45,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:45,206 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 18:17:45,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:45,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675241386] [2022-07-12 18:17:45,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675241386] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:45,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:45,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:17:45,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59242837] [2022-07-12 18:17:45,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:45,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:17:45,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:45,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:17:45,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:45,208 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:45,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:45,222 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-07-12 18:17:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:17:45,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-12 18:17:45,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:45,223 INFO L225 Difference]: With dead ends: 52 [2022-07-12 18:17:45,223 INFO L226 Difference]: Without dead ends: 52 [2022-07-12 18:17:45,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:45,224 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 47 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:45,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 76 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-12 18:17:45,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-07-12 18:17:45,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-07-12 18:17:45,229 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 10 [2022-07-12 18:17:45,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:45,229 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-07-12 18:17:45,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-07-12 18:17:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:17:45,230 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:45,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:45,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 18:17:45,230 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:45,231 INFO L85 PathProgramCache]: Analyzing trace with hash 690580063, now seen corresponding path program 1 times [2022-07-12 18:17:45,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:45,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173470826] [2022-07-12 18:17:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:45,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:45,249 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 18:17:45,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:45,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173470826] [2022-07-12 18:17:45,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173470826] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:45,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:45,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:17:45,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498074515] [2022-07-12 18:17:45,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:45,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:17:45,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:45,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:17:45,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:17:45,252 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:45,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:45,266 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2022-07-12 18:17:45,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:17:45,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-12 18:17:45,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:45,267 INFO L225 Difference]: With dead ends: 45 [2022-07-12 18:17:45,267 INFO L226 Difference]: Without dead ends: 45 [2022-07-12 18:17:45,268 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 18:17:45,268 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:45,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:45,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-12 18:17:45,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-12 18:17:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.588235294117647) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-07-12 18:17:45,271 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 10 [2022-07-12 18:17:45,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:45,271 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-07-12 18:17:45,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:45,271 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-07-12 18:17:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:17:45,272 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:45,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:45,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 18:17:45,272 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:45,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:45,273 INFO L85 PathProgramCache]: Analyzing trace with hash 690580064, now seen corresponding path program 1 times [2022-07-12 18:17:45,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:45,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340686429] [2022-07-12 18:17:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:45,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:45,339 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 18:17:45,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:45,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340686429] [2022-07-12 18:17:45,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340686429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:45,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:45,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:17:45,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273121209] [2022-07-12 18:17:45,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:45,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:17:45,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:45,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:17:45,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:45,341 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:45,392 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2022-07-12 18:17:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:45,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-12 18:17:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:45,393 INFO L225 Difference]: With dead ends: 48 [2022-07-12 18:17:45,393 INFO L226 Difference]: Without dead ends: 48 [2022-07-12 18:17:45,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 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 18:17:45,396 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:45,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 58 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:45,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-12 18:17:45,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-07-12 18:17:45,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-07-12 18:17:45,405 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2022-07-12 18:17:45,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:45,405 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-07-12 18:17:45,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:45,405 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-07-12 18:17:45,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:17:45,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:45,406 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:45,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 18:17:45,406 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:45,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:45,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1736941833, now seen corresponding path program 1 times [2022-07-12 18:17:45,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:45,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596627122] [2022-07-12 18:17:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:45,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:45,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:45,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596627122] [2022-07-12 18:17:45,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596627122] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:17:45,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833081301] [2022-07-12 18:17:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:45,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:45,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:45,487 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 18:17:45,487 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 18:17:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:45,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 18:17:45,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:45,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:17:45,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:17:45,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:17:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:45,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:45,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833081301] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:45,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:17:45,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-12 18:17:45,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608968805] [2022-07-12 18:17:45,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:45,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:17:45,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:45,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:17:45,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:17:45,893 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:46,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:46,028 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2022-07-12 18:17:46,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:17:46,028 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 18:17:46,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:46,029 INFO L225 Difference]: With dead ends: 106 [2022-07-12 18:17:46,030 INFO L226 Difference]: Without dead ends: 106 [2022-07-12 18:17:46,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:17:46,031 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 185 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:46,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 168 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:17:46,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-12 18:17:46,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 43. [2022-07-12 18:17:46,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-07-12 18:17:46,042 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 12 [2022-07-12 18:17:46,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:46,042 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-07-12 18:17:46,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:46,043 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-07-12 18:17:46,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 18:17:46,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:46,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:46,063 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 18:17:46,259 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,SelfDestructingSolverStorable9 [2022-07-12 18:17:46,260 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:46,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:46,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1202382830, now seen corresponding path program 1 times [2022-07-12 18:17:46,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:46,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121461805] [2022-07-12 18:17:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:46,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:46,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:46,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121461805] [2022-07-12 18:17:46,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121461805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:46,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:46,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:17:46,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531978470] [2022-07-12 18:17:46,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:46,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:17:46,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:46,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:17:46,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:17:46,354 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:46,425 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-07-12 18:17:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:46,425 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-12 18:17:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:46,428 INFO L225 Difference]: With dead ends: 74 [2022-07-12 18:17:46,428 INFO L226 Difference]: Without dead ends: 74 [2022-07-12 18:17:46,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:17:46,429 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 94 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:46,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 135 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:46,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-12 18:17:46,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2022-07-12 18:17:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-07-12 18:17:46,435 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 14 [2022-07-12 18:17:46,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:46,435 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-07-12 18:17:46,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-07-12 18:17:46,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 18:17:46,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:46,437 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:46,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 18:17:46,437 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:46,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:46,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1202382883, now seen corresponding path program 1 times [2022-07-12 18:17:46,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:46,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905104799] [2022-07-12 18:17:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:46,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:46,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:46,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905104799] [2022-07-12 18:17:46,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905104799] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:17:46,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574895469] [2022-07-12 18:17:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:46,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:46,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:46,496 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 18:17:46,528 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 18:17:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:46,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:17:46,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:46,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:17:46,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574895469] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:46,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:17:46,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-07-12 18:17:46,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265588774] [2022-07-12 18:17:46,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:46,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:17:46,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:46,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:17:46,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:17:46,579 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:46,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:46,607 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2022-07-12 18:17:46,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:46,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-12 18:17:46,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:46,608 INFO L225 Difference]: With dead ends: 91 [2022-07-12 18:17:46,608 INFO L226 Difference]: Without dead ends: 91 [2022-07-12 18:17:46,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:17:46,609 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 51 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:46,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 109 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-12 18:17:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2022-07-12 18:17:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 68 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:46,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2022-07-12 18:17:46,618 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 14 [2022-07-12 18:17:46,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:46,618 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2022-07-12 18:17:46,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:46,618 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2022-07-12 18:17:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 18:17:46,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:46,621 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:46,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 18:17:46,835 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,SelfDestructingSolverStorable11 [2022-07-12 18:17:46,835 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:46,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:46,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1903447461, now seen corresponding path program 1 times [2022-07-12 18:17:46,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:46,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866403703] [2022-07-12 18:17:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:46,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:46,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:46,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866403703] [2022-07-12 18:17:46,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866403703] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:17:46,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398114343] [2022-07-12 18:17:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:46,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:46,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:46,905 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 18:17:46,906 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 18:17:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:46,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:17:46,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:46,959 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:17:46,959 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:17:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:47,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:47,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398114343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:47,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:17:47,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-12 18:17:47,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110259451] [2022-07-12 18:17:47,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:47,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:17:47,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:47,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:17:47,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:17:47,107 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:47,202 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2022-07-12 18:17:47,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:17:47,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-12 18:17:47,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:47,203 INFO L225 Difference]: With dead ends: 96 [2022-07-12 18:17:47,203 INFO L226 Difference]: Without dead ends: 96 [2022-07-12 18:17:47,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:17:47,205 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 72 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:47,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 159 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:17:47,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-12 18:17:47,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2022-07-12 18:17:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-07-12 18:17:47,207 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 14 [2022-07-12 18:17:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:47,207 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-07-12 18:17:47,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-07-12 18:17:47,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 18:17:47,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:47,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:47,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:47,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:47,425 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:47,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1460548268, now seen corresponding path program 1 times [2022-07-12 18:17:47,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:47,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126816756] [2022-07-12 18:17:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:47,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:47,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:47,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126816756] [2022-07-12 18:17:47,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126816756] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:47,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:47,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:17:47,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522281040] [2022-07-12 18:17:47,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:47,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:17:47,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:47,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:17:47,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:47,457 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:47,473 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2022-07-12 18:17:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:17:47,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-12 18:17:47,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:47,475 INFO L225 Difference]: With dead ends: 65 [2022-07-12 18:17:47,475 INFO L226 Difference]: Without dead ends: 65 [2022-07-12 18:17:47,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:47,475 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:47,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:47,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-12 18:17:47,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2022-07-12 18:17:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-07-12 18:17:47,477 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 14 [2022-07-12 18:17:47,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:47,478 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-07-12 18:17:47,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-07-12 18:17:47,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 18:17:47,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:47,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:47,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 18:17:47,480 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1380837930, now seen corresponding path program 1 times [2022-07-12 18:17:47,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:47,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217959328] [2022-07-12 18:17:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:47,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:47,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:47,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217959328] [2022-07-12 18:17:47,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217959328] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:47,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:47,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:17:47,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183260693] [2022-07-12 18:17:47,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:47,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:17:47,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:47,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:17:47,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:47,536 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:47,572 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2022-07-12 18:17:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:47,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-12 18:17:47,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:47,573 INFO L225 Difference]: With dead ends: 89 [2022-07-12 18:17:47,573 INFO L226 Difference]: Without dead ends: 89 [2022-07-12 18:17:47,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:17:47,575 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 90 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:47,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 84 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:47,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-12 18:17:47,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2022-07-12 18:17:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.296875) internal successors, (83), 71 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2022-07-12 18:17:47,577 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 15 [2022-07-12 18:17:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:47,577 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2022-07-12 18:17:47,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,578 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2022-07-12 18:17:47,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 18:17:47,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:47,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:47,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 18:17:47,579 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:47,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:47,580 INFO L85 PathProgramCache]: Analyzing trace with hash -679773352, now seen corresponding path program 1 times [2022-07-12 18:17:47,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:47,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988792980] [2022-07-12 18:17:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:47,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:47,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:47,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988792980] [2022-07-12 18:17:47,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988792980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:47,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:47,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:17:47,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262051842] [2022-07-12 18:17:47,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:47,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:17:47,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:47,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:17:47,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:47,617 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:47,629 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2022-07-12 18:17:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:17:47,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-12 18:17:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:47,630 INFO L225 Difference]: With dead ends: 71 [2022-07-12 18:17:47,630 INFO L226 Difference]: Without dead ends: 71 [2022-07-12 18:17:47,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:47,631 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 55 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:47,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 33 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-12 18:17:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2022-07-12 18:17:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-07-12 18:17:47,632 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 15 [2022-07-12 18:17:47,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:47,633 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-07-12 18:17:47,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-07-12 18:17:47,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:17:47,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:47,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:47,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 18:17:47,633 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:47,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:47,634 INFO L85 PathProgramCache]: Analyzing trace with hash 159643962, now seen corresponding path program 1 times [2022-07-12 18:17:47,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:47,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387389204] [2022-07-12 18:17:47,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:47,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:47,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:47,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387389204] [2022-07-12 18:17:47,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387389204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:47,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:47,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:17:47,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107953566] [2022-07-12 18:17:47,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:47,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:17:47,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:47,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:17:47,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:47,654 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:47,674 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-07-12 18:17:47,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:17:47,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-12 18:17:47,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:47,674 INFO L225 Difference]: With dead ends: 47 [2022-07-12 18:17:47,674 INFO L226 Difference]: Without dead ends: 47 [2022-07-12 18:17:47,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 18:17:47,675 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:47,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 46 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:47,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-12 18:17:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-12 18:17:47,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-07-12 18:17:47,677 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 17 [2022-07-12 18:17:47,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:47,677 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-07-12 18:17:47,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,677 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-07-12 18:17:47,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:17:47,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:47,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:47,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 18:17:47,678 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:47,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:47,678 INFO L85 PathProgramCache]: Analyzing trace with hash 159643963, now seen corresponding path program 1 times [2022-07-12 18:17:47,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:47,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327462764] [2022-07-12 18:17:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:47,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:47,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:47,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327462764] [2022-07-12 18:17:47,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327462764] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:47,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:47,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:17:47,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122647468] [2022-07-12 18:17:47,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:47,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:17:47,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:47,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:17:47,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:17:47,716 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:47,742 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-07-12 18:17:47,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-12 18:17:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:47,743 INFO L225 Difference]: With dead ends: 50 [2022-07-12 18:17:47,743 INFO L226 Difference]: Without dead ends: 50 [2022-07-12 18:17:47,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:17:47,744 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 91 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:47,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 56 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-12 18:17:47,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-07-12 18:17:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-07-12 18:17:47,745 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 17 [2022-07-12 18:17:47,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:47,745 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-07-12 18:17:47,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,745 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-07-12 18:17:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 18:17:47,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:47,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:47,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 18:17:47,746 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:47,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:47,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1200973612, now seen corresponding path program 1 times [2022-07-12 18:17:47,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:47,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431281875] [2022-07-12 18:17:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:47,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:47,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:47,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431281875] [2022-07-12 18:17:47,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431281875] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:17:47,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946401219] [2022-07-12 18:17:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:47,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:47,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:47,792 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 18:17:47,793 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 18:17:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:47,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 18:17:47,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:47,876 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 18:17:47,897 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 18:17:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:47,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:17:47,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946401219] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:47,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:17:47,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-07-12 18:17:47,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319358637] [2022-07-12 18:17:47,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:47,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:17:47,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:47,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:17:47,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:17:47,905 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:47,955 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-07-12 18:17:47,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:17:47,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-12 18:17:47,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:47,956 INFO L225 Difference]: With dead ends: 93 [2022-07-12 18:17:47,956 INFO L226 Difference]: Without dead ends: 93 [2022-07-12 18:17:47,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:17:47,957 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 41 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:47,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 186 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-12 18:17:47,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2022-07-12 18:17:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.25) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-07-12 18:17:47,959 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 19 [2022-07-12 18:17:47,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:47,959 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-07-12 18:17:47,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,959 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-07-12 18:17:47,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 18:17:47,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:47,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:47,979 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 18:17:48,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:48,179 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:48,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:48,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1814130006, now seen corresponding path program 1 times [2022-07-12 18:17:48,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:48,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329829485] [2022-07-12 18:17:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:48,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:48,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:48,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329829485] [2022-07-12 18:17:48,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329829485] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:17:48,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446824675] [2022-07-12 18:17:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:48,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:48,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:48,230 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 18:17:48,231 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 18:17:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:48,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 18:17:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:48,292 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:17:48,293 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:17:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:48,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:48,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446824675] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:48,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:17:48,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-12 18:17:48,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941437222] [2022-07-12 18:17:48,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:48,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:17:48,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:17:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:17:48,434 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:48,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:48,502 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2022-07-12 18:17:48,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:17:48,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-12 18:17:48,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:48,503 INFO L225 Difference]: With dead ends: 91 [2022-07-12 18:17:48,503 INFO L226 Difference]: Without dead ends: 91 [2022-07-12 18:17:48,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:17:48,504 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 131 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:48,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 117 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-12 18:17:48,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2022-07-12 18:17:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2022-07-12 18:17:48,506 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 19 [2022-07-12 18:17:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:48,506 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2022-07-12 18:17:48,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2022-07-12 18:17:48,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:17:48,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:48,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:48,529 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 18:17:48,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:48,724 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:48,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:48,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1424522230, now seen corresponding path program 1 times [2022-07-12 18:17:48,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:48,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375808825] [2022-07-12 18:17:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:48,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:48,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:48,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375808825] [2022-07-12 18:17:48,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375808825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:48,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:48,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:17:48,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036328796] [2022-07-12 18:17:48,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:48,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:17:48,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:48,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:17:48,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:48,759 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:48,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:48,783 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2022-07-12 18:17:48,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:48,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-12 18:17:48,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:48,785 INFO L225 Difference]: With dead ends: 75 [2022-07-12 18:17:48,785 INFO L226 Difference]: Without dead ends: 75 [2022-07-12 18:17:48,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:17:48,786 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:48,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 66 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:48,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-12 18:17:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-07-12 18:17:48,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 74 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2022-07-12 18:17:48,788 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 20 [2022-07-12 18:17:48,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:48,788 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2022-07-12 18:17:48,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:48,789 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2022-07-12 18:17:48,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:17:48,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:48,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:48,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 18:17:48,789 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:48,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1424522231, now seen corresponding path program 1 times [2022-07-12 18:17:48,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:48,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731230252] [2022-07-12 18:17:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:48,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:48,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:48,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731230252] [2022-07-12 18:17:48,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731230252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:48,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:48,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:17:48,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125997371] [2022-07-12 18:17:48,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:48,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:17:48,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:48,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:17:48,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:17:48,830 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:48,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:48,883 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2022-07-12 18:17:48,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:17:48,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-12 18:17:48,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:48,885 INFO L225 Difference]: With dead ends: 81 [2022-07-12 18:17:48,886 INFO L226 Difference]: Without dead ends: 81 [2022-07-12 18:17:48,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:17:48,886 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:48,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 77 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:48,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-12 18:17:48,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2022-07-12 18:17:48,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 76 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2022-07-12 18:17:48,888 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 20 [2022-07-12 18:17:48,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:48,888 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2022-07-12 18:17:48,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:48,888 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2022-07-12 18:17:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 18:17:48,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:48,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:48,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-12 18:17:48,888 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:48,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:48,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1210516230, now seen corresponding path program 1 times [2022-07-12 18:17:48,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:48,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493449293] [2022-07-12 18:17:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:48,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:48,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:48,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493449293] [2022-07-12 18:17:48,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493449293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:48,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:48,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:17:48,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199078533] [2022-07-12 18:17:48,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:48,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:17:48,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:48,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:17:48,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:48,916 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:48,937 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2022-07-12 18:17:48,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:17:48,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-12 18:17:48,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:48,938 INFO L225 Difference]: With dead ends: 76 [2022-07-12 18:17:48,938 INFO L226 Difference]: Without dead ends: 76 [2022-07-12 18:17:48,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 18:17:48,938 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:48,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:48,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-12 18:17:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-07-12 18:17:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:48,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2022-07-12 18:17:48,940 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 21 [2022-07-12 18:17:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:48,940 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2022-07-12 18:17:48,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:48,941 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2022-07-12 18:17:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 18:17:48,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:48,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:48,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-12 18:17:48,941 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:48,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:48,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1210516231, now seen corresponding path program 1 times [2022-07-12 18:17:48,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:48,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301327963] [2022-07-12 18:17:48,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:48,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:49,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:49,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301327963] [2022-07-12 18:17:49,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301327963] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:49,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:49,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:17:49,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472460671] [2022-07-12 18:17:49,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:49,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:17:49,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:49,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:17:49,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:17:49,018 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:49,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:49,068 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-07-12 18:17:49,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:17:49,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-12 18:17:49,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:49,069 INFO L225 Difference]: With dead ends: 80 [2022-07-12 18:17:49,069 INFO L226 Difference]: Without dead ends: 80 [2022-07-12 18:17:49,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:17:49,069 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:49,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 71 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:49,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-12 18:17:49,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-07-12 18:17:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 78 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2022-07-12 18:17:49,071 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 21 [2022-07-12 18:17:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:49,072 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2022-07-12 18:17:49,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:49,072 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2022-07-12 18:17:49,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 18:17:49,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:49,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:49,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-12 18:17:49,073 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:49,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:49,073 INFO L85 PathProgramCache]: Analyzing trace with hash -377785809, now seen corresponding path program 2 times [2022-07-12 18:17:49,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:49,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846048877] [2022-07-12 18:17:49,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:49,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:17:49,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:49,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846048877] [2022-07-12 18:17:49,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846048877] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:49,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:49,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 18:17:49,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772212859] [2022-07-12 18:17:49,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:49,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:17:49,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:49,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:17:49,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:17:49,128 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:49,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:49,223 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2022-07-12 18:17:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:17:49,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-12 18:17:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:49,223 INFO L225 Difference]: With dead ends: 102 [2022-07-12 18:17:49,223 INFO L226 Difference]: Without dead ends: 102 [2022-07-12 18:17:49,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:17:49,227 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 96 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:49,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 148 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:49,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-12 18:17:49,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2022-07-12 18:17:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 70 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2022-07-12 18:17:49,230 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 21 [2022-07-12 18:17:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:49,230 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2022-07-12 18:17:49,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:49,230 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2022-07-12 18:17:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 18:17:49,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:49,232 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:49,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-12 18:17:49,232 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:49,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1923036781, now seen corresponding path program 1 times [2022-07-12 18:17:49,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:49,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643672374] [2022-07-12 18:17:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:49,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:49,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:49,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643672374] [2022-07-12 18:17:49,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643672374] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:17:49,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741344963] [2022-07-12 18:17:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:49,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:49,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:49,348 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 18:17:49,349 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 18:17:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:49,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 18:17:49,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:49,503 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 14 treesize of output 10 [2022-07-12 18:17:49,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:17:49,569 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:17:49,570 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-12 18:17:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:49,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:49,619 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 11 [2022-07-12 18:17:49,622 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 20 treesize of output 18 [2022-07-12 18:17:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:49,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741344963] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:49,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:17:49,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-07-12 18:17:49,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625113646] [2022-07-12 18:17:49,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:49,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:17:49,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:49,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:17:49,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:17:49,789 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:50,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:50,060 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2022-07-12 18:17:50,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:17:50,061 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-12 18:17:50,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:50,061 INFO L225 Difference]: With dead ends: 95 [2022-07-12 18:17:50,061 INFO L226 Difference]: Without dead ends: 95 [2022-07-12 18:17:50,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:17:50,062 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 91 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:50,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 301 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 145 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-07-12 18:17:50,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-12 18:17:50,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2022-07-12 18:17:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 74 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2022-07-12 18:17:50,064 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 21 [2022-07-12 18:17:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:50,064 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2022-07-12 18:17:50,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:50,064 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2022-07-12 18:17:50,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 18:17:50,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:50,064 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:50,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:50,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-12 18:17:50,275 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:50,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:50,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1943656895, now seen corresponding path program 1 times [2022-07-12 18:17:50,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:50,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020368737] [2022-07-12 18:17:50,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:50,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:50,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:50,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020368737] [2022-07-12 18:17:50,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020368737] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:50,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:50,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 18:17:50,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942868033] [2022-07-12 18:17:50,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:50,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:17:50,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:50,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:17:50,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:17:50,342 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:50,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:50,429 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2022-07-12 18:17:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:17:50,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-12 18:17:50,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:50,430 INFO L225 Difference]: With dead ends: 126 [2022-07-12 18:17:50,430 INFO L226 Difference]: Without dead ends: 126 [2022-07-12 18:17:50,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:17:50,431 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:50,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 161 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-12 18:17:50,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2022-07-12 18:17:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.2155172413793103) internal successors, (141), 119 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2022-07-12 18:17:50,433 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 24 [2022-07-12 18:17:50,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:50,433 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2022-07-12 18:17:50,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2022-07-12 18:17:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 18:17:50,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:50,434 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:50,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-12 18:17:50,435 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:50,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2132455683, now seen corresponding path program 1 times [2022-07-12 18:17:50,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:50,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909275980] [2022-07-12 18:17:50,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:50,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:50,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:50,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909275980] [2022-07-12 18:17:50,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909275980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:50,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:50,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 18:17:50,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329504367] [2022-07-12 18:17:50,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:50,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:17:50,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:50,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:17:50,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:17:50,577 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:50,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:50,796 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2022-07-12 18:17:50,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:17:50,796 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-12 18:17:50,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:50,797 INFO L225 Difference]: With dead ends: 142 [2022-07-12 18:17:50,797 INFO L226 Difference]: Without dead ends: 142 [2022-07-12 18:17:50,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:17:50,797 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 80 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:50,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 199 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:17:50,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-12 18:17:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2022-07-12 18:17:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 110 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2022-07-12 18:17:50,800 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 24 [2022-07-12 18:17:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:50,800 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2022-07-12 18:17:50,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2022-07-12 18:17:50,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 18:17:50,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:50,800 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:50,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-12 18:17:50,800 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1709753857, now seen corresponding path program 1 times [2022-07-12 18:17:50,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:50,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329289797] [2022-07-12 18:17:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:50,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:50,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:50,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329289797] [2022-07-12 18:17:50,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329289797] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:50,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:50,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-12 18:17:50,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001256260] [2022-07-12 18:17:50,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:50,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:17:50,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:50,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:17:50,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:17:50,959 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:51,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:51,170 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2022-07-12 18:17:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:17:51,170 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-12 18:17:51,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:51,171 INFO L225 Difference]: With dead ends: 172 [2022-07-12 18:17:51,171 INFO L226 Difference]: Without dead ends: 172 [2022-07-12 18:17:51,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:17:51,172 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 124 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:51,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 171 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:17:51,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-12 18:17:51,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 128. [2022-07-12 18:17:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 124 states have (on average 1.2338709677419355) internal successors, (153), 127 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 153 transitions. [2022-07-12 18:17:51,174 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 153 transitions. Word has length 24 [2022-07-12 18:17:51,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:51,175 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 153 transitions. [2022-07-12 18:17:51,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:51,175 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 153 transitions. [2022-07-12 18:17:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:17:51,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:51,175 INFO L195 NwaCegarLoop]: trace histogram [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 18:17:51,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-12 18:17:51,176 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:51,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:51,176 INFO L85 PathProgramCache]: Analyzing trace with hash 123776973, now seen corresponding path program 1 times [2022-07-12 18:17:51,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:51,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560878212] [2022-07-12 18:17:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:51,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:51,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:51,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560878212] [2022-07-12 18:17:51,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560878212] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:51,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:51,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:17:51,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907017605] [2022-07-12 18:17:51,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:51,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:17:51,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:51,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:17:51,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:51,224 INFO L87 Difference]: Start difference. First operand 128 states and 153 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:51,236 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2022-07-12 18:17:51,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:17:51,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-12 18:17:51,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:51,237 INFO L225 Difference]: With dead ends: 127 [2022-07-12 18:17:51,237 INFO L226 Difference]: Without dead ends: 98 [2022-07-12 18:17:51,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 18:17:51,237 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:51,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 52 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:51,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-12 18:17:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-07-12 18:17:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 97 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:51,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2022-07-12 18:17:51,239 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 25 [2022-07-12 18:17:51,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:51,239 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2022-07-12 18:17:51,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:51,240 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2022-07-12 18:17:51,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:17:51,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:51,240 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:51,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-12 18:17:51,240 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:51,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:51,241 INFO L85 PathProgramCache]: Analyzing trace with hash 2136240330, now seen corresponding path program 2 times [2022-07-12 18:17:51,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:51,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221363972] [2022-07-12 18:17:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:51,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:51,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:51,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221363972] [2022-07-12 18:17:51,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221363972] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:17:51,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115334070] [2022-07-12 18:17:51,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:17:51,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:51,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:51,306 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 18:17:51,327 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 18:17:51,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:17:51,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:17:51,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 18:17:51,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:51,381 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:17:51,382 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:17:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:51,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:51,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115334070] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:51,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:17:51,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2022-07-12 18:17:51,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347926180] [2022-07-12 18:17:51,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:51,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:17:51,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:51,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:17:51,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:17:51,682 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:51,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:51,912 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2022-07-12 18:17:51,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:17:51,912 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-12 18:17:51,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:51,912 INFO L225 Difference]: With dead ends: 137 [2022-07-12 18:17:51,912 INFO L226 Difference]: Without dead ends: 137 [2022-07-12 18:17:51,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:17:51,913 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 170 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:51,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 187 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:17:51,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-12 18:17:51,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 102. [2022-07-12 18:17:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 99 states have (on average 1.1919191919191918) internal successors, (118), 101 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2022-07-12 18:17:51,915 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 25 [2022-07-12 18:17:51,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:51,915 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2022-07-12 18:17:51,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:51,915 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2022-07-12 18:17:51,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:17:51,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:51,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:51,936 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 18:17:52,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:52,116 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:52,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:52,117 INFO L85 PathProgramCache]: Analyzing trace with hash -67455619, now seen corresponding path program 1 times [2022-07-12 18:17:52,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:52,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515396056] [2022-07-12 18:17:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:52,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:52,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:52,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515396056] [2022-07-12 18:17:52,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515396056] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:17:52,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651884082] [2022-07-12 18:17:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:52,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:52,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:52,192 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:17:52,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 18:17:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:52,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 18:17:52,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:52,274 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:17:52,274 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:17:52,422 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 18:17:52,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:52,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651884082] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:52,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:17:52,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2022-07-12 18:17:52,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464881093] [2022-07-12 18:17:52,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:52,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:17:52,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:52,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:17:52,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:17:52,590 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:53,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:53,004 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2022-07-12 18:17:53,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:17:53,005 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-12 18:17:53,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:53,005 INFO L225 Difference]: With dead ends: 140 [2022-07-12 18:17:53,005 INFO L226 Difference]: Without dead ends: 134 [2022-07-12 18:17:53,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=1013, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 18:17:53,006 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 200 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:53,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 188 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:17:53,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-12 18:17:53,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 118. [2022-07-12 18:17:53,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 115 states have (on average 1.173913043478261) internal successors, (135), 117 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:53,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 135 transitions. [2022-07-12 18:17:53,008 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 135 transitions. Word has length 27 [2022-07-12 18:17:53,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:53,008 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 135 transitions. [2022-07-12 18:17:53,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:53,008 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 135 transitions. [2022-07-12 18:17:53,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:17:53,009 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:53,009 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:53,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:53,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-12 18:17:53,209 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:53,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:53,210 INFO L85 PathProgramCache]: Analyzing trace with hash -67409757, now seen corresponding path program 3 times [2022-07-12 18:17:53,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:53,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520260508] [2022-07-12 18:17:53,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:53,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:53,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:53,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520260508] [2022-07-12 18:17:53,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520260508] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:17:53,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749998953] [2022-07-12 18:17:53,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:17:53,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:53,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:53,498 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:17:53,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 18:17:53,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 18:17:53,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:17:53,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-12 18:17:53,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:53,687 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 14 treesize of output 10 [2022-07-12 18:17:53,751 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:17:53,752 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 23 treesize of output 11 [2022-07-12 18:17:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:53,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:53,814 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 25 [2022-07-12 18:17:53,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:17:53,817 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 45 treesize of output 39 [2022-07-12 18:17:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:54,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749998953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:54,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:17:54,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-07-12 18:17:54,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835039504] [2022-07-12 18:17:54,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:54,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 18:17:54,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:54,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 18:17:54,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:17:54,009 INFO L87 Difference]: Start difference. First operand 118 states and 135 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:54,842 INFO L93 Difference]: Finished difference Result 203 states and 227 transitions. [2022-07-12 18:17:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:17:54,842 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-12 18:17:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:54,843 INFO L225 Difference]: With dead ends: 203 [2022-07-12 18:17:54,843 INFO L226 Difference]: Without dead ends: 196 [2022-07-12 18:17:54,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=516, Invalid=1646, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 18:17:54,844 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 312 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:54,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 192 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:17:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-07-12 18:17:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 140. [2022-07-12 18:17:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 137 states have (on average 1.167883211678832) internal successors, (160), 139 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 160 transitions. [2022-07-12 18:17:54,847 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 160 transitions. Word has length 27 [2022-07-12 18:17:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:54,847 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 160 transitions. [2022-07-12 18:17:54,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 160 transitions. [2022-07-12 18:17:54,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 18:17:54,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:54,848 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:54,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:55,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:55,063 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:55,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:55,063 INFO L85 PathProgramCache]: Analyzing trace with hash -438004926, now seen corresponding path program 1 times [2022-07-12 18:17:55,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:55,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721752243] [2022-07-12 18:17:55,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:55,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:17:55,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:55,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721752243] [2022-07-12 18:17:55,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721752243] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:17:55,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013369055] [2022-07-12 18:17:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:55,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:55,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:55,124 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:17:55,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 18:17:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:55,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:17:55,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:17:55,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:17:55,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013369055] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:55,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:17:55,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-07-12 18:17:55,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572703568] [2022-07-12 18:17:55,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:55,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:17:55,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:55,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:17:55,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:17:55,274 INFO L87 Difference]: Start difference. First operand 140 states and 160 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:55,400 INFO L93 Difference]: Finished difference Result 169 states and 190 transitions. [2022-07-12 18:17:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:17:55,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-12 18:17:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:55,402 INFO L225 Difference]: With dead ends: 169 [2022-07-12 18:17:55,402 INFO L226 Difference]: Without dead ends: 169 [2022-07-12 18:17:55,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:17:55,402 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 139 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:55,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 161 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:17:55,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-12 18:17:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 137. [2022-07-12 18:17:55,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 134 states have (on average 1.1567164179104477) internal successors, (155), 136 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 155 transitions. [2022-07-12 18:17:55,405 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 155 transitions. Word has length 28 [2022-07-12 18:17:55,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:55,405 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 155 transitions. [2022-07-12 18:17:55,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:55,405 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 155 transitions. [2022-07-12 18:17:55,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:17:55,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:55,405 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:55,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:55,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-12 18:17:55,616 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:55,616 INFO L85 PathProgramCache]: Analyzing trace with hash -35087801, now seen corresponding path program 1 times [2022-07-12 18:17:55,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:55,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813449467] [2022-07-12 18:17:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:55,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:17:55,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:55,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813449467] [2022-07-12 18:17:55,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813449467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:55,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:55,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 18:17:55,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475344640] [2022-07-12 18:17:55,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:55,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:17:55,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:55,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:17:55,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:17:55,713 INFO L87 Difference]: Start difference. First operand 137 states and 155 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:55,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:55,799 INFO L93 Difference]: Finished difference Result 159 states and 177 transitions. [2022-07-12 18:17:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:17:55,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-12 18:17:55,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:55,803 INFO L225 Difference]: With dead ends: 159 [2022-07-12 18:17:55,803 INFO L226 Difference]: Without dead ends: 144 [2022-07-12 18:17:55,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:17:55,805 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:55,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 132 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:55,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-12 18:17:55,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2022-07-12 18:17:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 112 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2022-07-12 18:17:55,807 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 30 [2022-07-12 18:17:55,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:55,808 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2022-07-12 18:17:55,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:55,808 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2022-07-12 18:17:55,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 18:17:55,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:55,808 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:55,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-12 18:17:55,809 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:55,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:55,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666176, now seen corresponding path program 4 times [2022-07-12 18:17:55,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:55,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909990662] [2022-07-12 18:17:55,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:55,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:55,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:55,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909990662] [2022-07-12 18:17:55,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909990662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:17:55,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748730430] [2022-07-12 18:17:55,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:17:55,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:55,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:55,920 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:17:55,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 18:17:55,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:17:55,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:17:55,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 18:17:55,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:56,043 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:17:56,044 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:17:56,141 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 14 treesize of output 10 [2022-07-12 18:17:56,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:17:56,278 INFO L356 Elim1Store]: treesize reduction 6, result has 76.0 percent of original size [2022-07-12 18:17:56,278 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2022-07-12 18:17:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:17:56,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:56,593 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 25 [2022-07-12 18:17:56,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:17:56,598 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 45 treesize of output 39 [2022-07-12 18:17:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:17:56,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748730430] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:56,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:17:56,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-07-12 18:17:56,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841078909] [2022-07-12 18:17:56,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:56,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 18:17:56,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:56,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 18:17:56,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:17:56,880 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 31 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:57,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:57,547 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2022-07-12 18:17:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 18:17:57,547 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-12 18:17:57,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:57,548 INFO L225 Difference]: With dead ends: 153 [2022-07-12 18:17:57,548 INFO L226 Difference]: Without dead ends: 153 [2022-07-12 18:17:57,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 18:17:57,549 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 135 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:57,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 288 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 560 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-07-12 18:17:57,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-12 18:17:57,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2022-07-12 18:17:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 120 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 139 transitions. [2022-07-12 18:17:57,551 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 139 transitions. Word has length 31 [2022-07-12 18:17:57,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:57,551 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 139 transitions. [2022-07-12 18:17:57,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:57,551 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 139 transitions. [2022-07-12 18:17:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 18:17:57,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:57,552 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:57,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:57,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-12 18:17:57,769 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:57,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:57,769 INFO L85 PathProgramCache]: Analyzing trace with hash -992295355, now seen corresponding path program 2 times [2022-07-12 18:17:57,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:57,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045357140] [2022-07-12 18:17:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:57,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:17:57,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:57,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045357140] [2022-07-12 18:17:57,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045357140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:17:57,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330067351] [2022-07-12 18:17:57,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:17:57,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:57,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:57,859 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:17:57,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 18:17:57,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:17:57,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:17:57,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:17:57,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:17:58,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:58,116 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 5 treesize of output 3 [2022-07-12 18:17:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:17:58,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330067351] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:58,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:17:58,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-07-12 18:17:58,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243439167] [2022-07-12 18:17:58,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:58,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 18:17:58,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:58,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 18:17:58,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:17:58,138 INFO L87 Difference]: Start difference. First operand 121 states and 139 transitions. Second operand has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:58,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:58,333 INFO L93 Difference]: Finished difference Result 140 states and 156 transitions. [2022-07-12 18:17:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:17:58,333 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-12 18:17:58,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:58,334 INFO L225 Difference]: With dead ends: 140 [2022-07-12 18:17:58,334 INFO L226 Difference]: Without dead ends: 140 [2022-07-12 18:17:58,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:17:58,335 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 130 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:58,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 213 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:17:58,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-12 18:17:58,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 129. [2022-07-12 18:17:58,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 128 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2022-07-12 18:17:58,337 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 32 [2022-07-12 18:17:58,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:58,337 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2022-07-12 18:17:58,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:58,337 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2022-07-12 18:17:58,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 18:17:58,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:58,338 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:58,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:58,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-12 18:17:58,556 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:58,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1626154062, now seen corresponding path program 5 times [2022-07-12 18:17:58,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:58,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679547829] [2022-07-12 18:17:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:58,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:58,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:58,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679547829] [2022-07-12 18:17:58,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679547829] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:17:58,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580671696] [2022-07-12 18:17:58,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:17:58,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:58,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:58,674 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:17:58,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 18:17:58,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-12 18:17:58,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:17:58,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 18:17:58,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:58,755 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:17:58,755 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:17:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:58,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:59,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580671696] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:59,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:17:59,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 33 [2022-07-12 18:17:59,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298257626] [2022-07-12 18:17:59,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:59,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 18:17:59,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:17:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 18:17:59,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 18:17:59,124 INFO L87 Difference]: Start difference. First operand 129 states and 146 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:59,506 INFO L93 Difference]: Finished difference Result 251 states and 274 transitions. [2022-07-12 18:17:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 18:17:59,506 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-12 18:17:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:59,507 INFO L225 Difference]: With dead ends: 251 [2022-07-12 18:17:59,507 INFO L226 Difference]: Without dead ends: 238 [2022-07-12 18:17:59,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=1572, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 18:17:59,509 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 227 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:59,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 281 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:17:59,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-12 18:17:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 148. [2022-07-12 18:17:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.1655172413793105) internal successors, (169), 147 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:59,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2022-07-12 18:17:59,512 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 35 [2022-07-12 18:17:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:59,512 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2022-07-12 18:17:59,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:59,513 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2022-07-12 18:17:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 18:17:59,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:59,516 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:59,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-12 18:17:59,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-12 18:17:59,747 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:17:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:59,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1310569203, now seen corresponding path program 3 times [2022-07-12 18:17:59,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:17:59,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387010471] [2022-07-12 18:17:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:59,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:17:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:17:59,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:17:59,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387010471] [2022-07-12 18:17:59,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387010471] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:17:59,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707454366] [2022-07-12 18:17:59,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:17:59,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:17:59,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:59,918 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:17:59,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 18:17:59,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 18:17:59,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:17:59,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-12 18:18:00,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:00,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:18:00,115 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 11 treesize of output 7 [2022-07-12 18:18:00,121 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 18:18:00,160 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 18:18:00,190 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 18:18:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:18:00,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:00,202 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_592) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-07-12 18:18:00,208 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_592) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:18:00,215 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_592) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2022-07-12 18:18:00,223 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:00,223 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-12 18:18:00,228 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:00,228 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-12 18:18:00,231 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 11 treesize of output 7 [2022-07-12 18:18:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2022-07-12 18:18:00,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707454366] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:00,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:00,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-07-12 18:18:00,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435488031] [2022-07-12 18:18:00,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:00,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 18:18:00,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:00,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 18:18:00,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=433, Unknown=3, NotChecked=132, Total=650 [2022-07-12 18:18:00,337 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:00,584 INFO L93 Difference]: Finished difference Result 253 states and 286 transitions. [2022-07-12 18:18:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:18:00,584 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-12 18:18:00,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:00,585 INFO L225 Difference]: With dead ends: 253 [2022-07-12 18:18:00,585 INFO L226 Difference]: Without dead ends: 215 [2022-07-12 18:18:00,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=645, Unknown=3, NotChecked=162, Total=930 [2022-07-12 18:18:00,586 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 65 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:00,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 343 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 294 Invalid, 0 Unknown, 149 Unchecked, 0.1s Time] [2022-07-12 18:18:00,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-07-12 18:18:00,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 206. [2022-07-12 18:18:00,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 203 states have (on average 1.1576354679802956) internal successors, (235), 205 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 235 transitions. [2022-07-12 18:18:00,590 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 235 transitions. Word has length 36 [2022-07-12 18:18:00,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:00,590 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 235 transitions. [2022-07-12 18:18:00,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:00,590 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 235 transitions. [2022-07-12 18:18:00,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 18:18:00,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:00,591 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:00,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-12 18:18:00,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:00,795 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:00,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:00,796 INFO L85 PathProgramCache]: Analyzing trace with hash 634400591, now seen corresponding path program 6 times [2022-07-12 18:18:00,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:00,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107655117] [2022-07-12 18:18:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:00,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:18:01,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:01,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107655117] [2022-07-12 18:18:01,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107655117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:01,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20524951] [2022-07-12 18:18:01,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:18:01,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:01,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:01,227 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:01,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 18:18:01,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-12 18:18:01,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:01,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-12 18:18:01,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:01,599 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 14 treesize of output 10 [2022-07-12 18:18:01,870 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:01,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 19 [2022-07-12 18:18:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:18:01,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:02,026 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 59 treesize of output 51 [2022-07-12 18:18:02,030 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-12 18:18:02,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 81 [2022-07-12 18:18:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:18:02,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20524951] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:02,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:02,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 47 [2022-07-12 18:18:02,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214664540] [2022-07-12 18:18:02,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:02,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 18:18:02,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:02,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 18:18:02,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 18:18:02,377 INFO L87 Difference]: Start difference. First operand 206 states and 235 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:06,996 INFO L93 Difference]: Finished difference Result 457 states and 500 transitions. [2022-07-12 18:18:07,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-12 18:18:07,001 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-12 18:18:07,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:07,003 INFO L225 Difference]: With dead ends: 457 [2022-07-12 18:18:07,003 INFO L226 Difference]: Without dead ends: 435 [2022-07-12 18:18:07,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3336 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2404, Invalid=10478, Unknown=0, NotChecked=0, Total=12882 [2022-07-12 18:18:07,005 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 583 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:07,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 529 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 18:18:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-07-12 18:18:07,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 218. [2022-07-12 18:18:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 215 states have (on average 1.158139534883721) internal successors, (249), 217 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 249 transitions. [2022-07-12 18:18:07,009 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 249 transitions. Word has length 39 [2022-07-12 18:18:07,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:07,009 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 249 transitions. [2022-07-12 18:18:07,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:07,009 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 249 transitions. [2022-07-12 18:18:07,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:18:07,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:07,010 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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 18:18:07,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:07,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-12 18:18:07,212 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:07,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1413686832, now seen corresponding path program 4 times [2022-07-12 18:18:07,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:07,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015126049] [2022-07-12 18:18:07,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:07,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:18:07,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:07,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015126049] [2022-07-12 18:18:07,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015126049] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:07,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832984960] [2022-07-12 18:18:07,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:18:07,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:07,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:07,280 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:07,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 18:18:07,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:18:07,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:07,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-12 18:18:07,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:07,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:18:07,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:18:07,548 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 14 treesize of output 10 [2022-07-12 18:18:07,569 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 17 treesize of output 19 [2022-07-12 18:18:07,679 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 17 treesize of output 19 [2022-07-12 18:18:07,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:07,750 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-07-12 18:18:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:18:07,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:07,928 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:07,929 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-12 18:18:07,934 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:07,934 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-12 18:18:07,938 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 9 treesize of output 7 [2022-07-12 18:18:08,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:18:08,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:08,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:18:08,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832984960] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:08,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:08,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 30 [2022-07-12 18:18:08,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248393311] [2022-07-12 18:18:08,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:08,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 18:18:08,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:08,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 18:18:08,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-07-12 18:18:08,407 INFO L87 Difference]: Start difference. First operand 218 states and 249 transitions. Second operand has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:09,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:09,044 INFO L93 Difference]: Finished difference Result 221 states and 247 transitions. [2022-07-12 18:18:09,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 18:18:09,044 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-12 18:18:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:09,045 INFO L225 Difference]: With dead ends: 221 [2022-07-12 18:18:09,045 INFO L226 Difference]: Without dead ends: 221 [2022-07-12 18:18:09,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=447, Invalid=2309, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 18:18:09,046 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 276 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:09,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 193 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 292 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-07-12 18:18:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-12 18:18:09,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 215. [2022-07-12 18:18:09,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 212 states have (on average 1.150943396226415) internal successors, (244), 214 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 244 transitions. [2022-07-12 18:18:09,049 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 244 transitions. Word has length 40 [2022-07-12 18:18:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:09,049 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 244 transitions. [2022-07-12 18:18:09,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 244 transitions. [2022-07-12 18:18:09,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 18:18:09,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:09,049 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:09,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:09,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:09,250 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:09,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:09,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2078988342, now seen corresponding path program 1 times [2022-07-12 18:18:09,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:09,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775539383] [2022-07-12 18:18:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:09,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:18:09,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:09,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775539383] [2022-07-12 18:18:09,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775539383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:09,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293790454] [2022-07-12 18:18:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:09,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:09,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:09,387 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:09,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 18:18:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:09,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-12 18:18:09,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:09,479 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:18:09,480 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:18:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:18:09,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:18:09,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293790454] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:09,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:09,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2022-07-12 18:18:09,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999658591] [2022-07-12 18:18:09,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:09,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 18:18:09,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:09,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 18:18:09,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 18:18:09,923 INFO L87 Difference]: Start difference. First operand 215 states and 244 transitions. Second operand has 34 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 34 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:10,257 INFO L93 Difference]: Finished difference Result 243 states and 270 transitions. [2022-07-12 18:18:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:18:10,257 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 34 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-12 18:18:10,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:10,258 INFO L225 Difference]: With dead ends: 243 [2022-07-12 18:18:10,258 INFO L226 Difference]: Without dead ends: 236 [2022-07-12 18:18:10,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1572, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 18:18:10,259 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 332 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:10,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 265 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:18:10,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-12 18:18:10,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 225. [2022-07-12 18:18:10,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 222 states have (on average 1.1396396396396395) internal successors, (253), 224 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:10,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 253 transitions. [2022-07-12 18:18:10,267 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 253 transitions. Word has length 41 [2022-07-12 18:18:10,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:10,267 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 253 transitions. [2022-07-12 18:18:10,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 34 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:10,267 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 253 transitions. [2022-07-12 18:18:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 18:18:10,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:10,268 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:10,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:10,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:10,479 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:10,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:10,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1605342100, now seen corresponding path program 7 times [2022-07-12 18:18:10,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:10,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315036505] [2022-07-12 18:18:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:10,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:18:10,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:10,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315036505] [2022-07-12 18:18:10,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315036505] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:10,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307479015] [2022-07-12 18:18:10,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:18:10,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:10,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:10,647 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:10,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 18:18:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:10,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 18:18:10,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:10,755 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:18:10,756 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:18:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:18:11,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 45 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:18:11,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307479015] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:11,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:11,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 41 [2022-07-12 18:18:11,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442749550] [2022-07-12 18:18:11,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:11,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-12 18:18:11,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:11,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-12 18:18:11,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 18:18:11,400 INFO L87 Difference]: Start difference. First operand 225 states and 253 transitions. Second operand has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 42 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:12,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:12,082 INFO L93 Difference]: Finished difference Result 401 states and 440 transitions. [2022-07-12 18:18:12,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:18:12,083 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 42 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-12 18:18:12,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:12,090 INFO L225 Difference]: With dead ends: 401 [2022-07-12 18:18:12,090 INFO L226 Difference]: Without dead ends: 401 [2022-07-12 18:18:12,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=631, Invalid=2561, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 18:18:12,091 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 356 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:12,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 388 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:18:12,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-07-12 18:18:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 231. [2022-07-12 18:18:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 228 states have (on average 1.144736842105263) internal successors, (261), 230 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 261 transitions. [2022-07-12 18:18:12,101 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 261 transitions. Word has length 43 [2022-07-12 18:18:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:12,113 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 261 transitions. [2022-07-12 18:18:12,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 42 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 261 transitions. [2022-07-12 18:18:12,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 18:18:12,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:12,114 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:12,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-12 18:18:12,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:12,329 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:12,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:12,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1392056413, now seen corresponding path program 2 times [2022-07-12 18:18:12,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:12,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222889563] [2022-07-12 18:18:12,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:12,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 18:18:12,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:12,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222889563] [2022-07-12 18:18:12,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222889563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:12,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768739759] [2022-07-12 18:18:12,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:18:12,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:12,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:12,603 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:12,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 18:18:12,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:18:12,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:12,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-12 18:18:12,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:12,892 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 14 treesize of output 10 [2022-07-12 18:18:13,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:13,018 INFO L356 Elim1Store]: treesize reduction 15, result has 40.0 percent of original size [2022-07-12 18:18:13,018 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 20 [2022-07-12 18:18:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 18:18:13,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:13,114 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 25 [2022-07-12 18:18:13,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:13,117 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 45 treesize of output 39 [2022-07-12 18:18:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 18:18:13,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768739759] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:13,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:13,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 39 [2022-07-12 18:18:13,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121851824] [2022-07-12 18:18:13,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:13,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 18:18:13,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:13,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 18:18:13,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 18:18:13,448 INFO L87 Difference]: Start difference. First operand 231 states and 261 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:14,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:14,042 INFO L93 Difference]: Finished difference Result 257 states and 288 transitions. [2022-07-12 18:18:14,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:18:14,043 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-12 18:18:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:14,043 INFO L225 Difference]: With dead ends: 257 [2022-07-12 18:18:14,043 INFO L226 Difference]: Without dead ends: 250 [2022-07-12 18:18:14,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=453, Invalid=2199, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 18:18:14,045 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 217 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:14,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 251 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 340 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-07-12 18:18:14,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-12 18:18:14,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2022-07-12 18:18:14,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 235 states have (on average 1.1404255319148937) internal successors, (268), 237 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 268 transitions. [2022-07-12 18:18:14,048 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 268 transitions. Word has length 43 [2022-07-12 18:18:14,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:14,048 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 268 transitions. [2022-07-12 18:18:14,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 268 transitions. [2022-07-12 18:18:14,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:18:14,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:14,049 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 18:18:14,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-12 18:18:14,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:14,250 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:14,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:14,250 INFO L85 PathProgramCache]: Analyzing trace with hash -701284269, now seen corresponding path program 5 times [2022-07-12 18:18:14,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:14,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315775540] [2022-07-12 18:18:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:14,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:18:14,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:14,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315775540] [2022-07-12 18:18:14,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315775540] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:14,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700644388] [2022-07-12 18:18:14,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:18:14,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:14,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:14,359 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:14,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 18:18:14,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 18:18:14,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:14,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-12 18:18:14,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:18:14,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:14,661 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 22 treesize of output 18 [2022-07-12 18:18:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:18:14,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700644388] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:14,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:14,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-07-12 18:18:14,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49725485] [2022-07-12 18:18:14,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:14,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:18:14,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:14,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:18:14,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:18:14,762 INFO L87 Difference]: Start difference. First operand 238 states and 268 transitions. Second operand has 24 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:15,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:15,053 INFO L93 Difference]: Finished difference Result 255 states and 281 transitions. [2022-07-12 18:18:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:18:15,053 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-12 18:18:15,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:15,054 INFO L225 Difference]: With dead ends: 255 [2022-07-12 18:18:15,054 INFO L226 Difference]: Without dead ends: 255 [2022-07-12 18:18:15,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 18:18:15,055 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 221 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:15,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 428 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:18:15,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-12 18:18:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 247. [2022-07-12 18:18:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 244 states have (on average 1.1352459016393444) internal successors, (277), 246 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 277 transitions. [2022-07-12 18:18:15,060 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 277 transitions. Word has length 44 [2022-07-12 18:18:15,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:15,060 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 277 transitions. [2022-07-12 18:18:15,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:15,060 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 277 transitions. [2022-07-12 18:18:15,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 18:18:15,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:15,061 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:15,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:15,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-12 18:18:15,267 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:15,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:15,268 INFO L85 PathProgramCache]: Analyzing trace with hash -840498235, now seen corresponding path program 8 times [2022-07-12 18:18:15,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:15,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510023623] [2022-07-12 18:18:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:15,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:18:15,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:15,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510023623] [2022-07-12 18:18:15,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510023623] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:15,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379227209] [2022-07-12 18:18:15,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:18:15,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:15,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:15,730 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:15,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 18:18:15,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:18:15,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:15,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-12 18:18:15,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:16,114 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 14 treesize of output 10 [2022-07-12 18:18:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:18:16,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:16,962 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 89 treesize of output 77 [2022-07-12 18:18:16,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:16,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:16,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:16,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:16,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:16,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:16,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:16,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:16,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:16,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:16,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:16,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:16,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:16,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:16,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:16,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 123 [2022-07-12 18:18:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:18:17,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379227209] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:17,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:17,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 25] total 59 [2022-07-12 18:18:17,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538428804] [2022-07-12 18:18:17,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:17,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-12 18:18:17,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:17,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-12 18:18:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=3095, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 18:18:17,500 INFO L87 Difference]: Start difference. First operand 247 states and 277 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:19,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:19,429 INFO L93 Difference]: Finished difference Result 391 states and 441 transitions. [2022-07-12 18:18:19,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-12 18:18:19,430 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-12 18:18:19,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:19,430 INFO L225 Difference]: With dead ends: 391 [2022-07-12 18:18:19,431 INFO L226 Difference]: Without dead ends: 363 [2022-07-12 18:18:19,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1115, Invalid=6717, Unknown=0, NotChecked=0, Total=7832 [2022-07-12 18:18:19,434 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 297 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:19,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 382 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 548 Invalid, 0 Unknown, 167 Unchecked, 0.2s Time] [2022-07-12 18:18:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-12 18:18:19,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 315. [2022-07-12 18:18:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 312 states have (on average 1.1506410256410255) internal successors, (359), 314 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:19,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 359 transitions. [2022-07-12 18:18:19,438 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 359 transitions. Word has length 45 [2022-07-12 18:18:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:19,438 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 359 transitions. [2022-07-12 18:18:19,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 359 transitions. [2022-07-12 18:18:19,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 18:18:19,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:19,439 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:19,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-12 18:18:19,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-12 18:18:19,655 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:19,656 INFO L85 PathProgramCache]: Analyzing trace with hash 800775488, now seen corresponding path program 3 times [2022-07-12 18:18:19,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:19,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776741274] [2022-07-12 18:18:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:19,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:18:19,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:19,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776741274] [2022-07-12 18:18:19,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776741274] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:19,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868406140] [2022-07-12 18:18:19,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:18:19,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:19,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:19,797 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:19,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 18:18:19,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 18:18:19,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:19,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 18:18:19,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:19,930 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:18:19,930 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:18:20,042 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 14 treesize of output 10 [2022-07-12 18:18:20,199 INFO L356 Elim1Store]: treesize reduction 2, result has 93.5 percent of original size [2022-07-12 18:18:20,201 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2022-07-12 18:18:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 18:18:20,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:20,748 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 27 treesize of output 23 [2022-07-12 18:18:20,754 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:20,754 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 39 treesize of output 43 [2022-07-12 18:18:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 18:18:21,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868406140] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:21,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:21,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2022-07-12 18:18:21,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388253480] [2022-07-12 18:18:21,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:21,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 18:18:21,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:21,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 18:18:21,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 18:18:21,083 INFO L87 Difference]: Start difference. First operand 315 states and 359 transitions. Second operand has 39 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 39 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:22,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:22,363 INFO L93 Difference]: Finished difference Result 381 states and 428 transitions. [2022-07-12 18:18:22,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-12 18:18:22,363 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 39 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-12 18:18:22,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:22,364 INFO L225 Difference]: With dead ends: 381 [2022-07-12 18:18:22,364 INFO L226 Difference]: Without dead ends: 343 [2022-07-12 18:18:22,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=549, Invalid=4281, Unknown=0, NotChecked=0, Total=4830 [2022-07-12 18:18:22,365 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:22,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 413 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 941 Invalid, 0 Unknown, 162 Unchecked, 0.3s Time] [2022-07-12 18:18:22,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-12 18:18:22,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 301. [2022-07-12 18:18:22,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 298 states have (on average 1.1409395973154361) internal successors, (340), 300 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:22,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 340 transitions. [2022-07-12 18:18:22,368 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 340 transitions. Word has length 47 [2022-07-12 18:18:22,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:22,368 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 340 transitions. [2022-07-12 18:18:22,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 39 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:22,368 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 340 transitions. [2022-07-12 18:18:22,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 18:18:22,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:22,369 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:22,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:22,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:22,585 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:22,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:22,585 INFO L85 PathProgramCache]: Analyzing trace with hash 255004699, now seen corresponding path program 6 times [2022-07-12 18:18:22,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:22,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451487250] [2022-07-12 18:18:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:22,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:18:23,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:23,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451487250] [2022-07-12 18:18:23,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451487250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:23,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176522119] [2022-07-12 18:18:23,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:18:23,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:23,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:23,099 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:23,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 18:18:23,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-12 18:18:23,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:23,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-12 18:18:23,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:23,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:18:23,435 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 14 treesize of output 10 [2022-07-12 18:18:23,469 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 17 treesize of output 19 [2022-07-12 18:18:23,572 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 16 treesize of output 18 [2022-07-12 18:18:23,664 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 16 treesize of output 18 [2022-07-12 18:18:23,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:23,734 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:23,735 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-07-12 18:18:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:18:23,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:23,748 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_988 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_988) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-07-12 18:18:23,752 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_988 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_988) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:18:23,757 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_988 (Array Int Int)) (v_ArrVal_987 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_987) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_988) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:18:23,764 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_988 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_988) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:18:23,833 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:23,833 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-12 18:18:23,837 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:23,837 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-12 18:18:23,840 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 11 treesize of output 7 [2022-07-12 18:18:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 11 not checked. [2022-07-12 18:18:24,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176522119] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:24,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:24,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15, 16] total 47 [2022-07-12 18:18:24,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544160368] [2022-07-12 18:18:24,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:24,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 18:18:24,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:24,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 18:18:24,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1677, Unknown=4, NotChecked=340, Total=2162 [2022-07-12 18:18:24,066 INFO L87 Difference]: Start difference. First operand 301 states and 340 transitions. Second operand has 47 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:25,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:25,473 INFO L93 Difference]: Finished difference Result 426 states and 479 transitions. [2022-07-12 18:18:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-12 18:18:25,474 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-12 18:18:25,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:25,475 INFO L225 Difference]: With dead ends: 426 [2022-07-12 18:18:25,475 INFO L226 Difference]: Without dead ends: 374 [2022-07-12 18:18:25,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 4 IntricatePredicates, 4 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=468, Invalid=4514, Unknown=4, NotChecked=564, Total=5550 [2022-07-12 18:18:25,475 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 292 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:25,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 558 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 637 Invalid, 0 Unknown, 431 Unchecked, 0.2s Time] [2022-07-12 18:18:25,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-07-12 18:18:25,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 363. [2022-07-12 18:18:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 360 states have (on average 1.1305555555555555) internal successors, (407), 362 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 407 transitions. [2022-07-12 18:18:25,479 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 407 transitions. Word has length 48 [2022-07-12 18:18:25,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:25,479 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 407 transitions. [2022-07-12 18:18:25,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 407 transitions. [2022-07-12 18:18:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 18:18:25,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:25,480 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:25,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-12 18:18:25,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:25,687 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:25,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:25,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1859699616, now seen corresponding path program 1 times [2022-07-12 18:18:25,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:25,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976635452] [2022-07-12 18:18:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:25,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:18:25,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:25,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976635452] [2022-07-12 18:18:25,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976635452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:25,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427806445] [2022-07-12 18:18:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:25,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:25,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:25,885 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:25,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 18:18:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:25,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 18:18:25,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:26,203 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 14 treesize of output 10 [2022-07-12 18:18:26,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:26,247 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:26,247 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-12 18:18:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:18:26,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:26,294 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 11 [2022-07-12 18:18:26,296 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 20 treesize of output 18 [2022-07-12 18:18:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 18:18:26,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427806445] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:26,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:26,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-07-12 18:18:26,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720212838] [2022-07-12 18:18:26,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:26,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 18:18:26,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:26,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 18:18:26,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 18:18:26,607 INFO L87 Difference]: Start difference. First operand 363 states and 407 transitions. Second operand has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:27,208 INFO L93 Difference]: Finished difference Result 366 states and 409 transitions. [2022-07-12 18:18:27,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:18:27,208 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-07-12 18:18:27,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:27,209 INFO L225 Difference]: With dead ends: 366 [2022-07-12 18:18:27,209 INFO L226 Difference]: Without dead ends: 361 [2022-07-12 18:18:27,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1792, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 18:18:27,209 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 178 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:27,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 205 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 337 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-07-12 18:18:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-07-12 18:18:27,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 358. [2022-07-12 18:18:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 355 states have (on average 1.1267605633802817) internal successors, (400), 357 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 400 transitions. [2022-07-12 18:18:27,213 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 400 transitions. Word has length 50 [2022-07-12 18:18:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:27,214 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 400 transitions. [2022-07-12 18:18:27,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:27,215 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 400 transitions. [2022-07-12 18:18:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 18:18:27,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:27,215 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:27,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-12 18:18:27,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-12 18:18:27,431 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:27,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:27,432 INFO L85 PathProgramCache]: Analyzing trace with hash -107318273, now seen corresponding path program 9 times [2022-07-12 18:18:27,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:27,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218288668] [2022-07-12 18:18:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:27,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:18:27,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:27,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218288668] [2022-07-12 18:18:27,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218288668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:27,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012971292] [2022-07-12 18:18:27,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:18:27,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:27,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:27,624 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:27,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 18:18:27,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-12 18:18:27,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:27,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-12 18:18:27,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:27,782 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:18:27,782 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:18:28,046 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 14 treesize of output 10 [2022-07-12 18:18:28,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:28,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:28,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:28,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:28,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:28,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:28,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:28,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:28,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:28,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:28,693 INFO L356 Elim1Store]: treesize reduction 30, result has 74.4 percent of original size [2022-07-12 18:18:28,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 65 treesize of output 113 [2022-07-12 18:18:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-12 18:18:28,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:29,642 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 87 treesize of output 75 [2022-07-12 18:18:29,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:29,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:29,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:29,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:29,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:29,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:29,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:29,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:29,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:29,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:29,669 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:29,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 139 treesize of output 167 [2022-07-12 18:18:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 18:18:30,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012971292] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:30,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:30,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 22] total 59 [2022-07-12 18:18:30,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47611301] [2022-07-12 18:18:30,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:30,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-12 18:18:30,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:30,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-12 18:18:30,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3176, Unknown=0, NotChecked=0, Total=3540 [2022-07-12 18:18:30,475 INFO L87 Difference]: Start difference. First operand 358 states and 400 transitions. Second operand has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:33,403 INFO L93 Difference]: Finished difference Result 417 states and 474 transitions. [2022-07-12 18:18:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-12 18:18:33,404 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-12 18:18:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:33,405 INFO L225 Difference]: With dead ends: 417 [2022-07-12 18:18:33,405 INFO L226 Difference]: Without dead ends: 417 [2022-07-12 18:18:33,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3019 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1506, Invalid=10704, Unknown=0, NotChecked=0, Total=12210 [2022-07-12 18:18:33,406 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 110 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:33,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 398 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 231 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2022-07-12 18:18:33,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-07-12 18:18:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 394. [2022-07-12 18:18:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 391 states have (on average 1.145780051150895) internal successors, (448), 393 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 448 transitions. [2022-07-12 18:18:33,410 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 448 transitions. Word has length 53 [2022-07-12 18:18:33,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:33,410 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 448 transitions. [2022-07-12 18:18:33,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:33,410 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 448 transitions. [2022-07-12 18:18:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 18:18:33,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:33,411 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:33,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:33,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-12 18:18:33,628 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:33,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1047745379, now seen corresponding path program 2 times [2022-07-12 18:18:33,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:33,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698422033] [2022-07-12 18:18:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:33,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:18:33,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:33,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698422033] [2022-07-12 18:18:33,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698422033] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:33,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388268672] [2022-07-12 18:18:33,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:18:33,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:33,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:33,954 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:33,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 18:18:34,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:18:34,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:34,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-12 18:18:34,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:34,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:18:34,264 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 14 treesize of output 10 [2022-07-12 18:18:34,298 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 17 treesize of output 19 [2022-07-12 18:18:34,367 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 18:18:34,417 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 18:18:34,466 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 18:18:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 18:18:34,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:34,477 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1151 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1151) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-07-12 18:18:34,480 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1151 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1151) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:18:34,485 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1151 (Array Int Int)) (v_ArrVal_1150 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1150) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1151) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:18:34,489 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1151 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1151) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:18:34,501 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1151 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1151) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-12 18:18:34,505 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:34,506 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-12 18:18:34,509 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:34,509 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-12 18:18:34,511 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 11 treesize of output 7 [2022-07-12 18:18:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 11 not checked. [2022-07-12 18:18:34,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388268672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:34,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:34,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 41 [2022-07-12 18:18:34,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893186673] [2022-07-12 18:18:34,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:34,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 18:18:34,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:34,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 18:18:34,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1137, Unknown=5, NotChecked=360, Total=1640 [2022-07-12 18:18:34,685 INFO L87 Difference]: Start difference. First operand 394 states and 448 transitions. Second operand has 41 states, 41 states have (on average 2.707317073170732) internal successors, (111), 41 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:35,233 INFO L93 Difference]: Finished difference Result 482 states and 553 transitions. [2022-07-12 18:18:35,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:18:35,233 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.707317073170732) internal successors, (111), 41 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-12 18:18:35,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:35,234 INFO L225 Difference]: With dead ends: 482 [2022-07-12 18:18:35,234 INFO L226 Difference]: Without dead ends: 459 [2022-07-12 18:18:35,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=228, Invalid=1857, Unknown=5, NotChecked=460, Total=2550 [2022-07-12 18:18:35,235 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 112 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:35,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 649 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 646 Invalid, 0 Unknown, 410 Unchecked, 0.2s Time] [2022-07-12 18:18:35,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-07-12 18:18:35,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 441. [2022-07-12 18:18:35,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 438 states have (on average 1.1529680365296804) internal successors, (505), 440 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:35,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 505 transitions. [2022-07-12 18:18:35,238 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 505 transitions. Word has length 54 [2022-07-12 18:18:35,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:35,239 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 505 transitions. [2022-07-12 18:18:35,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.707317073170732) internal successors, (111), 41 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:35,239 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 505 transitions. [2022-07-12 18:18:35,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 18:18:35,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:35,239 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:35,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-12 18:18:35,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-07-12 18:18:35,440 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:35,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:35,440 INFO L85 PathProgramCache]: Analyzing trace with hash -477173151, now seen corresponding path program 7 times [2022-07-12 18:18:35,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:35,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253955992] [2022-07-12 18:18:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:35,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 18:18:35,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:35,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253955992] [2022-07-12 18:18:35,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253955992] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:35,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507746800] [2022-07-12 18:18:35,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:18:35,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:35,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:35,569 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:35,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 18:18:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:35,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-12 18:18:35,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:35,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:35,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:18:35,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:18:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 18:18:35,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 18:18:36,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507746800] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:36,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:36,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2022-07-12 18:18:36,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879798542] [2022-07-12 18:18:36,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:36,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 18:18:36,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:36,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 18:18:36,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 18:18:36,254 INFO L87 Difference]: Start difference. First operand 441 states and 505 transitions. Second operand has 33 states, 32 states have (on average 3.8125) internal successors, (122), 33 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:36,866 INFO L93 Difference]: Finished difference Result 463 states and 520 transitions. [2022-07-12 18:18:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:18:36,866 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.8125) internal successors, (122), 33 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-12 18:18:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:36,867 INFO L225 Difference]: With dead ends: 463 [2022-07-12 18:18:36,867 INFO L226 Difference]: Without dead ends: 463 [2022-07-12 18:18:36,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=428, Invalid=2022, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 18:18:36,868 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 339 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:36,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 477 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:18:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-07-12 18:18:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 446. [2022-07-12 18:18:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 443 states have (on average 1.1512415349887133) internal successors, (510), 445 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:36,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 510 transitions. [2022-07-12 18:18:36,872 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 510 transitions. Word has length 56 [2022-07-12 18:18:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:36,872 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 510 transitions. [2022-07-12 18:18:36,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.8125) internal successors, (122), 33 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:36,873 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 510 transitions. [2022-07-12 18:18:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 18:18:36,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:36,873 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:36,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:37,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:37,091 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:37,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:37,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1089586808, now seen corresponding path program 4 times [2022-07-12 18:18:37,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:37,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201350299] [2022-07-12 18:18:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:37,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 18:18:37,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:37,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201350299] [2022-07-12 18:18:37,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201350299] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:37,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694305207] [2022-07-12 18:18:37,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:18:37,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:37,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:37,230 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:37,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 18:18:37,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:18:37,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:37,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-12 18:18:37,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:37,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:37,360 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:18:37,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:18:37,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:18:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-12 18:18:37,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:38,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-12 18:18:38,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694305207] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:38,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:38,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2022-07-12 18:18:38,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829359943] [2022-07-12 18:18:38,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:38,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 18:18:38,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:38,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 18:18:38,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 18:18:38,097 INFO L87 Difference]: Start difference. First operand 446 states and 510 transitions. Second operand has 34 states, 33 states have (on average 3.484848484848485) internal successors, (115), 34 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:40,553 INFO L93 Difference]: Finished difference Result 504 states and 563 transitions. [2022-07-12 18:18:40,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-12 18:18:40,554 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.484848484848485) internal successors, (115), 34 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-12 18:18:40,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:40,555 INFO L225 Difference]: With dead ends: 504 [2022-07-12 18:18:40,555 INFO L226 Difference]: Without dead ends: 504 [2022-07-12 18:18:40,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1097, Invalid=5875, Unknown=0, NotChecked=0, Total=6972 [2022-07-12 18:18:40,556 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 440 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:40,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 503 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1197 Invalid, 0 Unknown, 41 Unchecked, 0.5s Time] [2022-07-12 18:18:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-07-12 18:18:40,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 476. [2022-07-12 18:18:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 473 states have (on average 1.150105708245243) internal successors, (544), 475 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 544 transitions. [2022-07-12 18:18:40,560 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 544 transitions. Word has length 59 [2022-07-12 18:18:40,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:40,561 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 544 transitions. [2022-07-12 18:18:40,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.484848484848485) internal successors, (115), 34 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 544 transitions. [2022-07-12 18:18:40,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 18:18:40,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:40,562 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:40,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:40,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:40,778 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:40,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:40,779 INFO L85 PathProgramCache]: Analyzing trace with hash -193422740, now seen corresponding path program 5 times [2022-07-12 18:18:40,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:40,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590245348] [2022-07-12 18:18:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:40,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:18:40,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:40,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590245348] [2022-07-12 18:18:40,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590245348] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:40,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748746227] [2022-07-12 18:18:40,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:18:40,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:40,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:40,964 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:40,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 18:18:41,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-12 18:18:41,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:41,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-12 18:18:41,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:41,100 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:18:41,101 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:18:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:18:41,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 66 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:18:41,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748746227] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:41,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:41,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2022-07-12 18:18:41,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076220853] [2022-07-12 18:18:41,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:41,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 18:18:41,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:41,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 18:18:41,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1885, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 18:18:41,926 INFO L87 Difference]: Start difference. First operand 476 states and 544 transitions. Second operand has 47 states, 46 states have (on average 3.3260869565217392) internal successors, (153), 47 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:42,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:42,769 INFO L93 Difference]: Finished difference Result 711 states and 787 transitions. [2022-07-12 18:18:42,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 18:18:42,769 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.3260869565217392) internal successors, (153), 47 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-12 18:18:42,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:42,771 INFO L225 Difference]: With dead ends: 711 [2022-07-12 18:18:42,771 INFO L226 Difference]: Without dead ends: 685 [2022-07-12 18:18:42,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=966, Invalid=3726, Unknown=0, NotChecked=0, Total=4692 [2022-07-12 18:18:42,772 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 222 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:42,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 470 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:18:42,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-07-12 18:18:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 475. [2022-07-12 18:18:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 472 states have (on average 1.1398305084745763) internal successors, (538), 474 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 538 transitions. [2022-07-12 18:18:42,778 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 538 transitions. Word has length 59 [2022-07-12 18:18:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:42,778 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 538 transitions. [2022-07-12 18:18:42,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.3260869565217392) internal successors, (153), 47 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 538 transitions. [2022-07-12 18:18:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 18:18:42,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:42,779 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:42,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:42,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:42,995 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:42,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:42,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1399784233, now seen corresponding path program 8 times [2022-07-12 18:18:42,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:42,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464097970] [2022-07-12 18:18:42,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:42,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:18:43,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:43,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464097970] [2022-07-12 18:18:43,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464097970] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:43,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279194305] [2022-07-12 18:18:43,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:18:43,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:43,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:43,607 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:43,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-12 18:18:43,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:18:43,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:43,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-12 18:18:43,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:43,739 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 10 treesize of output 8 [2022-07-12 18:18:43,950 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 14 treesize of output 10 [2022-07-12 18:18:44,002 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 17 treesize of output 19 [2022-07-12 18:18:44,114 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 17 treesize of output 19 [2022-07-12 18:18:44,175 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 16 treesize of output 18 [2022-07-12 18:18:44,188 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 18:18:44,194 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 18:18:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 18:18:44,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:44,204 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1396 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1396) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-07-12 18:18:44,209 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1396 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1396) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:18:44,214 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1396 (Array Int Int)) (v_ArrVal_1395 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1395) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1396) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:18:44,219 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1396 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1396) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:18:44,237 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1396 (Array Int Int)) (v_ArrVal_1394 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1394) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1396) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:18:44,242 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1396 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1396) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:18:44,250 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1396 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1396) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-12 18:18:44,255 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:44,255 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-12 18:18:44,259 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:44,259 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-12 18:18:44,268 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 11 treesize of output 7 [2022-07-12 18:18:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 23 not checked. [2022-07-12 18:18:44,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279194305] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:44,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:44,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 18, 18] total 48 [2022-07-12 18:18:44,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537712626] [2022-07-12 18:18:44,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:44,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-12 18:18:44,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:44,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-12 18:18:44,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1533, Unknown=7, NotChecked=588, Total=2256 [2022-07-12 18:18:44,500 INFO L87 Difference]: Start difference. First operand 475 states and 538 transitions. Second operand has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:46,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:46,692 INFO L93 Difference]: Finished difference Result 609 states and 683 transitions. [2022-07-12 18:18:46,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-12 18:18:46,692 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-12 18:18:46,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:46,694 INFO L225 Difference]: With dead ends: 609 [2022-07-12 18:18:46,694 INFO L226 Difference]: Without dead ends: 552 [2022-07-12 18:18:46,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 97 SyntacticMatches, 11 SemanticMatches, 82 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=598, Invalid=5274, Unknown=8, NotChecked=1092, Total=6972 [2022-07-12 18:18:46,695 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 542 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 2141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 821 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:46,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 723 Invalid, 2141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1193 Invalid, 0 Unknown, 821 Unchecked, 0.5s Time] [2022-07-12 18:18:46,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-07-12 18:18:46,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 532. [2022-07-12 18:18:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 529 states have (on average 1.1323251417769375) internal successors, (599), 531 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 599 transitions. [2022-07-12 18:18:46,714 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 599 transitions. Word has length 60 [2022-07-12 18:18:46,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:46,714 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 599 transitions. [2022-07-12 18:18:46,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 599 transitions. [2022-07-12 18:18:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-12 18:18:46,715 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:46,715 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:46,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:46,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-12 18:18:46,928 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:46,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2052733487, now seen corresponding path program 6 times [2022-07-12 18:18:46,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:46,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538583285] [2022-07-12 18:18:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:46,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 18:18:47,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:47,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538583285] [2022-07-12 18:18:47,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538583285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:47,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056792327] [2022-07-12 18:18:47,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:18:47,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:47,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:47,211 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:47,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-12 18:18:47,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-12 18:18:47,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:47,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-12 18:18:47,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:47,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:18:47,656 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 18:18:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 18:18:47,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:47,671 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 11 [2022-07-12 18:18:47,672 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 20 treesize of output 18 [2022-07-12 18:18:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 18:18:47,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056792327] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:47,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:47,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-12 18:18:47,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041508197] [2022-07-12 18:18:47,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:47,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 18:18:47,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 18:18:47,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 18:18:47,940 INFO L87 Difference]: Start difference. First operand 532 states and 599 transitions. Second operand has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:48,834 INFO L93 Difference]: Finished difference Result 578 states and 641 transitions. [2022-07-12 18:18:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 18:18:48,834 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-12 18:18:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:48,835 INFO L225 Difference]: With dead ends: 578 [2022-07-12 18:18:48,835 INFO L226 Difference]: Without dead ends: 573 [2022-07-12 18:18:48,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1238, Invalid=3318, Unknown=0, NotChecked=0, Total=4556 [2022-07-12 18:18:48,836 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 436 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:48,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 384 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 561 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-07-12 18:18:48,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-07-12 18:18:48,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 521. [2022-07-12 18:18:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 518 states have (on average 1.1274131274131274) internal successors, (584), 520 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 584 transitions. [2022-07-12 18:18:48,841 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 584 transitions. Word has length 61 [2022-07-12 18:18:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:48,841 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 584 transitions. [2022-07-12 18:18:48,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 584 transitions. [2022-07-12 18:18:48,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-12 18:18:48,842 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:48,842 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:48,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:49,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:49,059 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:49,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:49,059 INFO L85 PathProgramCache]: Analyzing trace with hash -881133237, now seen corresponding path program 7 times [2022-07-12 18:18:49,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:49,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812701739] [2022-07-12 18:18:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:49,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:18:49,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:49,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812701739] [2022-07-12 18:18:49,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812701739] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:49,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143760128] [2022-07-12 18:18:49,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:18:49,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:49,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:49,415 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:49,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-12 18:18:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:49,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 18:18:49,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:49,849 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 14 treesize of output 10 [2022-07-12 18:18:50,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:50,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:50,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:18:50,088 INFO L356 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2022-07-12 18:18:50,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 31 [2022-07-12 18:18:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 13 proven. 56 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:18:50,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:50,233 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 44 treesize of output 38 [2022-07-12 18:18:50,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:50,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:50,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:18:50,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 60 [2022-07-12 18:18:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:18:50,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143760128] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:50,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:50,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 51 [2022-07-12 18:18:50,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376412252] [2022-07-12 18:18:50,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:50,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-12 18:18:50,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:50,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-12 18:18:50,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 18:18:50,746 INFO L87 Difference]: Start difference. First operand 521 states and 584 transitions. Second operand has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 51 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:51,584 INFO L93 Difference]: Finished difference Result 540 states and 601 transitions. [2022-07-12 18:18:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:18:51,588 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 51 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-12 18:18:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:51,589 INFO L225 Difference]: With dead ends: 540 [2022-07-12 18:18:51,589 INFO L226 Difference]: Without dead ends: 531 [2022-07-12 18:18:51,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=687, Invalid=3735, Unknown=0, NotChecked=0, Total=4422 [2022-07-12 18:18:51,589 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 226 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:51,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 334 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 444 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-07-12 18:18:51,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-07-12 18:18:51,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 518. [2022-07-12 18:18:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 515 states have (on average 1.1242718446601943) internal successors, (579), 517 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 579 transitions. [2022-07-12 18:18:51,593 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 579 transitions. Word has length 61 [2022-07-12 18:18:51,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:51,593 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 579 transitions. [2022-07-12 18:18:51,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 51 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:51,593 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 579 transitions. [2022-07-12 18:18:51,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-12 18:18:51,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:51,594 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:51,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:51,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:51,807 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:51,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:51,808 INFO L85 PathProgramCache]: Analyzing trace with hash -969356843, now seen corresponding path program 10 times [2022-07-12 18:18:51,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:51,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034268772] [2022-07-12 18:18:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:51,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 98 proven. 131 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:18:51,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:51,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034268772] [2022-07-12 18:18:51,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034268772] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:51,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375246747] [2022-07-12 18:18:51,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:18:51,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:51,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:51,977 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:51,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-12 18:18:52,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:18:52,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:52,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-12 18:18:52,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:52,122 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:18:52,122 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:18:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 132 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:18:52,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 124 proven. 99 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:18:52,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375246747] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:52,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:52,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 49 [2022-07-12 18:18:52,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381234047] [2022-07-12 18:18:52,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:52,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 18:18:52,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:52,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 18:18:52,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=1887, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 18:18:52,668 INFO L87 Difference]: Start difference. First operand 518 states and 579 transitions. Second operand has 49 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 49 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:53,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:53,437 INFO L93 Difference]: Finished difference Result 1030 states and 1118 transitions. [2022-07-12 18:18:53,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 18:18:53,438 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 49 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-12 18:18:53,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:53,440 INFO L225 Difference]: With dead ends: 1030 [2022-07-12 18:18:53,440 INFO L226 Difference]: Without dead ends: 1007 [2022-07-12 18:18:53,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1769, Invalid=5037, Unknown=0, NotChecked=0, Total=6806 [2022-07-12 18:18:53,440 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 490 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:53,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 253 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:18:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-07-12 18:18:53,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 600. [2022-07-12 18:18:53,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 597 states have (on average 1.1306532663316582) internal successors, (675), 599 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:53,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 675 transitions. [2022-07-12 18:18:53,446 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 675 transitions. Word has length 65 [2022-07-12 18:18:53,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:53,446 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 675 transitions. [2022-07-12 18:18:53,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.9183673469387754) internal successors, (143), 49 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:53,446 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 675 transitions. [2022-07-12 18:18:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-12 18:18:53,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:53,447 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:53,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:53,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-12 18:18:53,652 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:53,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:53,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1148899794, now seen corresponding path program 8 times [2022-07-12 18:18:53,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:53,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242942587] [2022-07-12 18:18:53,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:53,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:18:53,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:53,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242942587] [2022-07-12 18:18:53,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242942587] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:53,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037561524] [2022-07-12 18:18:53,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:18:53,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:53,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:53,827 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:53,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-12 18:18:53,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:18:53,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:53,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-12 18:18:53,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:53,966 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:18:53,967 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:18:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:18:54,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 45 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 18:18:54,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037561524] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:54,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:54,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2022-07-12 18:18:54,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32826428] [2022-07-12 18:18:54,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:54,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 18:18:54,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:54,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 18:18:54,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 18:18:54,750 INFO L87 Difference]: Start difference. First operand 600 states and 675 transitions. Second operand has 46 states, 45 states have (on average 3.577777777777778) internal successors, (161), 46 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:55,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:55,252 INFO L93 Difference]: Finished difference Result 623 states and 696 transitions. [2022-07-12 18:18:55,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 18:18:55,252 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.577777777777778) internal successors, (161), 46 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-12 18:18:55,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:55,254 INFO L225 Difference]: With dead ends: 623 [2022-07-12 18:18:55,254 INFO L226 Difference]: Without dead ends: 623 [2022-07-12 18:18:55,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=718, Invalid=2942, Unknown=0, NotChecked=0, Total=3660 [2022-07-12 18:18:55,255 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 316 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:55,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 380 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:18:55,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-07-12 18:18:55,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 600. [2022-07-12 18:18:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 597 states have (on average 1.1306532663316582) internal successors, (675), 599 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:55,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 675 transitions. [2022-07-12 18:18:55,261 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 675 transitions. Word has length 65 [2022-07-12 18:18:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:55,261 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 675 transitions. [2022-07-12 18:18:55,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.577777777777778) internal successors, (161), 46 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:55,261 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 675 transitions. [2022-07-12 18:18:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-12 18:18:55,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:55,262 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:55,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:55,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-12 18:18:55,471 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:18:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash 525787682, now seen corresponding path program 9 times [2022-07-12 18:18:55,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:18:55,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102501859] [2022-07-12 18:18:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:55,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:18:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 45 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:18:55,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:18:55,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102501859] [2022-07-12 18:18:55,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102501859] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:18:55,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456626388] [2022-07-12 18:18:55,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:18:55,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:18:55,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:18:55,688 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:18:55,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-12 18:18:55,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-12 18:18:55,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:55,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-12 18:18:55,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:55,897 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:18:55,897 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:18:56,192 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 14 treesize of output 10 [2022-07-12 18:18:56,750 INFO L356 Elim1Store]: treesize reduction 18, result has 86.3 percent of original size [2022-07-12 18:18:56,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 49 treesize of output 135 [2022-07-12 18:18:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-12 18:18:57,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:58,353 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 66 treesize of output 56 [2022-07-12 18:18:58,391 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:18:58,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 96 treesize of output 166 [2022-07-12 18:18:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 18:18:59,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456626388] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:59,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:18:59,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 23] total 62 [2022-07-12 18:18:59,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21243910] [2022-07-12 18:18:59,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:59,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-12 18:18:59,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:18:59,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-12 18:18:59,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=3502, Unknown=0, NotChecked=0, Total=3906 [2022-07-12 18:18:59,186 INFO L87 Difference]: Start difference. First operand 600 states and 675 transitions. Second operand has 63 states, 62 states have (on average 2.370967741935484) internal successors, (147), 63 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:04,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:19:04,950 INFO L93 Difference]: Finished difference Result 678 states and 756 transitions. [2022-07-12 18:19:04,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-12 18:19:04,950 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.370967741935484) internal successors, (147), 63 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-12 18:19:04,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:19:04,952 INFO L225 Difference]: With dead ends: 678 [2022-07-12 18:19:04,952 INFO L226 Difference]: Without dead ends: 645 [2022-07-12 18:19:04,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4064 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2603, Invalid=15487, Unknown=0, NotChecked=0, Total=18090 [2022-07-12 18:19:04,954 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 226 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 461 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:19:04,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 612 Invalid, 1912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1320 Invalid, 0 Unknown, 461 Unchecked, 0.6s Time] [2022-07-12 18:19:04,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-07-12 18:19:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 577. [2022-07-12 18:19:04,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 574 states have (on average 1.1236933797909407) internal successors, (645), 576 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 645 transitions. [2022-07-12 18:19:04,964 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 645 transitions. Word has length 65 [2022-07-12 18:19:04,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:19:04,965 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 645 transitions. [2022-07-12 18:19:04,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.370967741935484) internal successors, (147), 63 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:04,965 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 645 transitions. [2022-07-12 18:19:04,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-12 18:19:04,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:19:04,978 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:19:05,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-07-12 18:19:05,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-12 18:19:05,179 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:19:05,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:19:05,180 INFO L85 PathProgramCache]: Analyzing trace with hash 766851057, now seen corresponding path program 3 times [2022-07-12 18:19:05,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:19:05,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493021945] [2022-07-12 18:19:05,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:19:05,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:19:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:19:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:19:05,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:19:05,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493021945] [2022-07-12 18:19:05,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493021945] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:19:05,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764445876] [2022-07-12 18:19:05,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:19:05,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:19:05,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:19:05,629 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:19:05,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-12 18:19:05,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 18:19:05,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:19:05,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 112 conjunts are in the unsatisfiable core [2022-07-12 18:19:05,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:19:05,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:19:06,080 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 14 treesize of output 10 [2022-07-12 18:19:06,110 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 16 treesize of output 18 [2022-07-12 18:19:06,220 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 18:19:06,293 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 18:19:06,354 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 18:19:06,404 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 18:19:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 18:19:06,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:19:06,415 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1755) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-07-12 18:19:06,424 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1755) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:19:06,429 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1755 (Array Int Int)) (v_ArrVal_1754 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1754) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1755) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:19:06,434 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1755) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:19:06,441 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1755 (Array Int Int)) (v_ArrVal_1753 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1753) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1755) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:19:06,447 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1755) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:19:06,457 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1755) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-12 18:19:06,464 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:19:06,464 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-12 18:19:06,469 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:19:06,469 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-12 18:19:06,473 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 11 treesize of output 7 [2022-07-12 18:19:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 47 trivial. 23 not checked. [2022-07-12 18:19:06,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764445876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:19:06,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:19:06,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 18] total 48 [2022-07-12 18:19:06,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747144229] [2022-07-12 18:19:06,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:19:06,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-12 18:19:06,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:19:06,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-12 18:19:06,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1509, Unknown=7, NotChecked=588, Total=2256 [2022-07-12 18:19:06,690 INFO L87 Difference]: Start difference. First operand 577 states and 645 transitions. Second operand has 48 states, 48 states have (on average 2.625) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:07,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:19:07,870 INFO L93 Difference]: Finished difference Result 722 states and 806 transitions. [2022-07-12 18:19:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-12 18:19:07,870 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-12 18:19:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:19:07,872 INFO L225 Difference]: With dead ends: 722 [2022-07-12 18:19:07,872 INFO L226 Difference]: Without dead ends: 665 [2022-07-12 18:19:07,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 108 SyntacticMatches, 25 SemanticMatches, 58 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=240, Invalid=2537, Unknown=7, NotChecked=756, Total=3540 [2022-07-12 18:19:07,872 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 102 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 2178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:19:07,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1167 Invalid, 2178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1471 Invalid, 0 Unknown, 674 Unchecked, 0.6s Time] [2022-07-12 18:19:07,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-07-12 18:19:07,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 632. [2022-07-12 18:19:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 629 states have (on average 1.1335453100158983) internal successors, (713), 631 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 713 transitions. [2022-07-12 18:19:07,878 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 713 transitions. Word has length 66 [2022-07-12 18:19:07,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:19:07,878 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 713 transitions. [2022-07-12 18:19:07,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:07,878 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 713 transitions. [2022-07-12 18:19:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 18:19:07,879 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:19:07,879 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:19:07,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-12 18:19:08,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:19:08,095 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:19:08,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:19:08,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1418151039, now seen corresponding path program 10 times [2022-07-12 18:19:08,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:19:08,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2929221] [2022-07-12 18:19:08,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:19:08,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:19:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:19:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 82 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:19:08,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:19:08,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2929221] [2022-07-12 18:19:08,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2929221] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:19:08,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579670856] [2022-07-12 18:19:08,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:19:08,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:19:08,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:19:08,902 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:19:08,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-12 18:19:09,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:19:09,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:19:09,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-12 18:19:09,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:19:09,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:19:09,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:19:09,634 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 18:19:10,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:10,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:10,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:10,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:10,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:10,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:10,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:10,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:10,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:10,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:10,151 INFO L356 Elim1Store]: treesize reduction 26, result has 55.9 percent of original size [2022-07-12 18:19:10,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 55 [2022-07-12 18:19:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 20 proven. 86 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:19:10,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:19:11,256 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 74 treesize of output 64 [2022-07-12 18:19:11,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:11,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:11,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:11,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:11,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:11,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:11,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:11,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:11,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:11,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:11,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-07-12 18:19:12,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 29 proven. 77 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:19:12,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579670856] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:19:12,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:19:12,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 77 [2022-07-12 18:19:12,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548427818] [2022-07-12 18:19:12,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:19:12,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-12 18:19:12,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:19:12,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-12 18:19:12,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=5359, Unknown=0, NotChecked=0, Total=5852 [2022-07-12 18:19:12,053 INFO L87 Difference]: Start difference. First operand 632 states and 713 transitions. Second operand has 77 states, 77 states have (on average 2.25974025974026) internal successors, (174), 77 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:18,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:19:18,353 INFO L93 Difference]: Finished difference Result 675 states and 753 transitions. [2022-07-12 18:19:18,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-12 18:19:18,354 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.25974025974026) internal successors, (174), 77 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-12 18:19:18,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:19:18,355 INFO L225 Difference]: With dead ends: 675 [2022-07-12 18:19:18,355 INFO L226 Difference]: Without dead ends: 640 [2022-07-12 18:19:18,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6192 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1802, Invalid=18790, Unknown=0, NotChecked=0, Total=20592 [2022-07-12 18:19:18,357 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 424 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:19:18,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 597 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1413 Invalid, 0 Unknown, 299 Unchecked, 0.8s Time] [2022-07-12 18:19:18,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-07-12 18:19:18,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 619. [2022-07-12 18:19:18,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 616 states have (on average 1.1314935064935066) internal successors, (697), 618 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:18,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 697 transitions. [2022-07-12 18:19:18,361 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 697 transitions. Word has length 67 [2022-07-12 18:19:18,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:19:18,362 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 697 transitions. [2022-07-12 18:19:18,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.25974025974026) internal successors, (174), 77 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:18,362 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 697 transitions. [2022-07-12 18:19:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-12 18:19:18,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:19:18,363 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:19:18,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-12 18:19:18,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:19:18,581 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:19:18,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:19:18,581 INFO L85 PathProgramCache]: Analyzing trace with hash -569162641, now seen corresponding path program 9 times [2022-07-12 18:19:18,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:19:18,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761905308] [2022-07-12 18:19:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:19:18,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:19:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:19:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 18:19:18,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:19:18,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761905308] [2022-07-12 18:19:18,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761905308] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:19:18,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112985233] [2022-07-12 18:19:18,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:19:18,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:19:18,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:19:18,744 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:19:18,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-12 18:19:18,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 18:19:18,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:19:18,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-12 18:19:18,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:19:18,926 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:19:18,926 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:19:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 18:19:19,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:19:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 18:19:19,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112985233] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:19:19,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:19:19,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-07-12 18:19:19,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600027993] [2022-07-12 18:19:19,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:19:19,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 18:19:19,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:19:19,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 18:19:19,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 18:19:19,626 INFO L87 Difference]: Start difference. First operand 619 states and 697 transitions. Second operand has 36 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 36 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:20,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:19:20,354 INFO L93 Difference]: Finished difference Result 673 states and 742 transitions. [2022-07-12 18:19:20,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 18:19:20,354 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 36 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-12 18:19:20,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:19:20,356 INFO L225 Difference]: With dead ends: 673 [2022-07-12 18:19:20,356 INFO L226 Difference]: Without dead ends: 673 [2022-07-12 18:19:20,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=577, Invalid=2393, Unknown=0, NotChecked=0, Total=2970 [2022-07-12 18:19:20,356 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 425 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:19:20,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 509 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:19:20,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-07-12 18:19:20,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 632. [2022-07-12 18:19:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 629 states have (on average 1.1287758346581875) internal successors, (710), 631 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 710 transitions. [2022-07-12 18:19:20,362 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 710 transitions. Word has length 68 [2022-07-12 18:19:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:19:20,362 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 710 transitions. [2022-07-12 18:19:20,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 36 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 710 transitions. [2022-07-12 18:19:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-12 18:19:20,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:19:20,363 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:19:20,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-07-12 18:19:20,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-07-12 18:19:20,567 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:19:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:19:20,568 INFO L85 PathProgramCache]: Analyzing trace with hash -270160718, now seen corresponding path program 11 times [2022-07-12 18:19:20,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:19:20,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227939961] [2022-07-12 18:19:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:19:20,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:19:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:19:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 123 proven. 139 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:19:20,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:19:20,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227939961] [2022-07-12 18:19:20,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227939961] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:19:20,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713901931] [2022-07-12 18:19:20,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:19:20,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:19:20,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:19:20,847 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:19:20,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-12 18:19:21,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-07-12 18:19:21,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:19:21,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-12 18:19:21,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:19:21,025 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:19:21,025 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:19:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 138 proven. 120 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:19:21,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:19:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 138 proven. 120 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:19:21,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713901931] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:19:21,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:19:21,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 57 [2022-07-12 18:19:21,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911617935] [2022-07-12 18:19:21,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:19:21,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-12 18:19:21,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:19:21,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-12 18:19:21,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=2660, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 18:19:21,970 INFO L87 Difference]: Start difference. First operand 632 states and 710 transitions. Second operand has 57 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:24,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:19:24,234 INFO L93 Difference]: Finished difference Result 1565 states and 1688 transitions. [2022-07-12 18:19:24,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-12 18:19:24,235 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-12 18:19:24,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:19:24,238 INFO L225 Difference]: With dead ends: 1565 [2022-07-12 18:19:24,239 INFO L226 Difference]: Without dead ends: 1518 [2022-07-12 18:19:24,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3115, Invalid=9767, Unknown=0, NotChecked=0, Total=12882 [2022-07-12 18:19:24,240 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 720 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:19:24,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 494 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 18:19:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2022-07-12 18:19:24,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 697. [2022-07-12 18:19:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 694 states have (on average 1.1340057636887608) internal successors, (787), 696 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 787 transitions. [2022-07-12 18:19:24,253 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 787 transitions. Word has length 69 [2022-07-12 18:19:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:19:24,253 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 787 transitions. [2022-07-12 18:19:24,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.9473684210526314) internal successors, (168), 57 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 787 transitions. [2022-07-12 18:19:24,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-12 18:19:24,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:19:24,255 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:19:24,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-12 18:19:24,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-07-12 18:19:24,463 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:19:24,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:19:24,463 INFO L85 PathProgramCache]: Analyzing trace with hash -74626530, now seen corresponding path program 11 times [2022-07-12 18:19:24,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:19:24,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621900829] [2022-07-12 18:19:24,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:19:24,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:19:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:19:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 45 proven. 86 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:19:24,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:19:24,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621900829] [2022-07-12 18:19:24,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621900829] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:19:24,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001523951] [2022-07-12 18:19:24,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:19:24,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:19:24,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:19:24,719 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:19:24,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-12 18:19:24,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-12 18:19:24,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:19:24,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-12 18:19:24,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:19:24,930 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:19:24,930 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:19:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 66 proven. 65 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:19:25,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:19:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 91 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:19:26,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001523951] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:19:26,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:19:26,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 56 [2022-07-12 18:19:26,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303708491] [2022-07-12 18:19:26,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:19:26,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-12 18:19:26,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:19:26,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-12 18:19:26,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2842, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 18:19:26,118 INFO L87 Difference]: Start difference. First operand 697 states and 787 transitions. Second operand has 57 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 57 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:19:27,536 INFO L93 Difference]: Finished difference Result 1020 states and 1122 transitions. [2022-07-12 18:19:27,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 18:19:27,537 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 57 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-07-12 18:19:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:19:27,539 INFO L225 Difference]: With dead ends: 1020 [2022-07-12 18:19:27,539 INFO L226 Difference]: Without dead ends: 1005 [2022-07-12 18:19:27,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1497, Invalid=5985, Unknown=0, NotChecked=0, Total=7482 [2022-07-12 18:19:27,540 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 258 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:19:27,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 594 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:19:27,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-07-12 18:19:27,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 721. [2022-07-12 18:19:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 718 states have (on average 1.1253481894150419) internal successors, (808), 720 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 808 transitions. [2022-07-12 18:19:27,550 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 808 transitions. Word has length 71 [2022-07-12 18:19:27,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:19:27,550 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 808 transitions. [2022-07-12 18:19:27,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 57 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 808 transitions. [2022-07-12 18:19:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-12 18:19:27,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:19:27,551 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:19:27,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-12 18:19:27,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-07-12 18:19:27,756 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:19:27,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:19:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1627104823, now seen corresponding path program 10 times [2022-07-12 18:19:27,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:19:27,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292356231] [2022-07-12 18:19:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:19:27,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:19:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:19:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 19 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:19:28,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:19:28,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292356231] [2022-07-12 18:19:28,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292356231] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:19:28,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22031043] [2022-07-12 18:19:28,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:19:28,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:19:28,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:19:28,527 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:19:28,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-12 18:19:28,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:19:28,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:19:28,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-12 18:19:28,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:19:28,701 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:19:28,701 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:19:28,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:19:29,052 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 16 treesize of output 12 [2022-07-12 18:19:29,095 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 18:19:29,240 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 18 treesize of output 20 [2022-07-12 18:19:29,332 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 18 treesize of output 20 [2022-07-12 18:19:29,426 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 18 treesize of output 20 [2022-07-12 18:19:29,519 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 18 treesize of output 20 [2022-07-12 18:19:29,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:29,610 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2022-07-12 18:19:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 18:19:29,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:19:30,987 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:19:30,987 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-12 18:19:30,993 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:19:30,993 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-12 18:19:30,996 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 11 treesize of output 7 [2022-07-12 18:19:31,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:31,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 59 refuted. 10 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 18:19:31,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22031043] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:19:31,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:19:31,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 21, 22] total 74 [2022-07-12 18:19:31,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549036774] [2022-07-12 18:19:31,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:19:31,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-12 18:19:31,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:19:31,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-12 18:19:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=4983, Unknown=36, NotChecked=0, Total=5402 [2022-07-12 18:19:31,970 INFO L87 Difference]: Start difference. First operand 721 states and 808 transitions. Second operand has 74 states, 74 states have (on average 2.3378378378378377) internal successors, (173), 74 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:42,921 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2089 (Array Int Int))) (or (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2089) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0))) (or (and (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2088 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2088) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2088 (Array Int Int))) (let ((.cse0 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2088) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse0)) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse0))))) (not (<= 0 |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (let ((.cse1 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (not (<= (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse1)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse1)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|) |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|) 0) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (or (not (<= (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0))) (forall ((v_ArrVal_2091 (Array Int Int)) (v_ArrVal_2090 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (let ((.cse2 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2090) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse2)) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse2)))) (forall ((v_ArrVal_2091 (Array Int Int)) (v_ArrVal_2090 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2090) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2089 (Array Int Int))) (let ((.cse3 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse3)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2089) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse3))))) is different from false [2022-07-12 18:19:44,635 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (and (<= 0 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (<= (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|)))) (.cse2 (<= (+ |c_ULTIMATE.start_cstrcat_#t~post5#1.offset| 1) (select |c_#length| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|)))) (and (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2089 (Array Int Int))) (or (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2089) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0))) (or (= |c_ULTIMATE.start_cstrcat_#t~mem6#1| 0) .cse0) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (let ((.cse1 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (not (<= (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse1)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse1)))) (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|) |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|) 0) (not .cse2) .cse0) .cse2 (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (or (not (<= (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0))) (forall ((v_ArrVal_2091 (Array Int Int)) (v_ArrVal_2090 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (let ((.cse3 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2090) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse3)) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse3)))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2088 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2088) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)))) (forall ((v_ArrVal_2091 (Array Int Int)) (v_ArrVal_2090 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int)) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2090) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (<= 0 |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2088 (Array Int Int))) (let ((.cse4 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2088) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse4)) (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse4)))) (forall ((v_ArrVal_2091 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_~s2#1.offset_147| Int) (v_ArrVal_2089 (Array Int Int))) (let ((.cse5 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) (or (< |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) (not (<= |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| .cse5)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2089) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2091) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_cstrcat_~s2#1.offset_147|)) 0) (<= (+ |v_ULTIMATE.start_cstrcat_~s2#1.offset_147| 1) .cse5)))) (<= 0 |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|))) is different from false [2022-07-12 18:19:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:19:45,463 INFO L93 Difference]: Finished difference Result 1101 states and 1217 transitions. [2022-07-12 18:19:45,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-07-12 18:19:45,464 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.3378378378378377) internal successors, (173), 74 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-07-12 18:19:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:19:45,466 INFO L225 Difference]: With dead ends: 1101 [2022-07-12 18:19:45,466 INFO L226 Difference]: Without dead ends: 966 [2022-07-12 18:19:45,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 10876 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=3285, Invalid=33887, Unknown=278, NotChecked=770, Total=38220 [2022-07-12 18:19:45,467 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1314 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 3022 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 4551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 3022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 983 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:19:45,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1314 Valid, 1087 Invalid, 4551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 3022 Invalid, 0 Unknown, 983 Unchecked, 1.3s Time] [2022-07-12 18:19:45,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-07-12 18:19:45,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 889. [2022-07-12 18:19:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 886 states have (on average 1.1264108352144468) internal successors, (998), 888 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 998 transitions. [2022-07-12 18:19:45,476 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 998 transitions. Word has length 72 [2022-07-12 18:19:45,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:19:45,476 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 998 transitions. [2022-07-12 18:19:45,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.3378378378378377) internal successors, (173), 74 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:45,476 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 998 transitions. [2022-07-12 18:19:45,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 18:19:45,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:19:45,477 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:19:45,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-07-12 18:19:45,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:19:45,681 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:19:45,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:19:45,681 INFO L85 PathProgramCache]: Analyzing trace with hash -528754417, now seen corresponding path program 12 times [2022-07-12 18:19:45,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:19:45,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235671939] [2022-07-12 18:19:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:19:45,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:19:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:19:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 123 proven. 172 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:19:45,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:19:45,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235671939] [2022-07-12 18:19:45,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235671939] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:19:45,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909867322] [2022-07-12 18:19:45,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:19:45,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:19:45,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:19:45,934 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:19:45,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-12 18:19:46,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-12 18:19:46,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:19:46,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-12 18:19:46,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:19:46,170 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:19:46,170 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:19:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 144 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:19:46,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:19:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 144 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:19:47,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909867322] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:19:47,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:19:47,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 63 [2022-07-12 18:19:47,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948048228] [2022-07-12 18:19:47,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:19:47,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-12 18:19:47,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:19:47,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-12 18:19:47,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=3152, Unknown=0, NotChecked=0, Total=3906 [2022-07-12 18:19:47,208 INFO L87 Difference]: Start difference. First operand 889 states and 998 transitions. Second operand has 63 states, 63 states have (on average 2.9365079365079363) internal successors, (185), 63 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:19:49,791 INFO L93 Difference]: Finished difference Result 2943 states and 3180 transitions. [2022-07-12 18:19:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-12 18:19:49,792 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.9365079365079363) internal successors, (185), 63 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-12 18:19:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:19:49,797 INFO L225 Difference]: With dead ends: 2943 [2022-07-12 18:19:49,797 INFO L226 Difference]: Without dead ends: 2835 [2022-07-12 18:19:49,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5171 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5257, Invalid=14765, Unknown=0, NotChecked=0, Total=20022 [2022-07-12 18:19:49,799 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1148 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:19:49,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1148 Valid, 419 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 18:19:49,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2022-07-12 18:19:49,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 1073. [2022-07-12 18:19:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1070 states have (on average 1.1364485981308412) internal successors, (1216), 1072 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1216 transitions. [2022-07-12 18:19:49,825 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1216 transitions. Word has length 73 [2022-07-12 18:19:49,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:19:49,825 INFO L495 AbstractCegarLoop]: Abstraction has 1073 states and 1216 transitions. [2022-07-12 18:19:49,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.9365079365079363) internal successors, (185), 63 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:49,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1216 transitions. [2022-07-12 18:19:49,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 18:19:49,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:19:49,827 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:19:49,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-12 18:19:50,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:19:50,045 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:19:50,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:19:50,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1523917955, now seen corresponding path program 12 times [2022-07-12 18:19:50,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:19:50,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978312593] [2022-07-12 18:19:50,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:19:50,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:19:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:19:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 18:19:50,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:19:50,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978312593] [2022-07-12 18:19:50,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978312593] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:19:50,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807524097] [2022-07-12 18:19:50,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:19:50,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:19:50,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:19:50,353 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:19:50,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-12 18:19:50,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-12 18:19:50,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:19:50,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 18:19:50,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:19:50,952 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 14 treesize of output 10 [2022-07-12 18:19:50,987 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 18:19:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 19 proven. 58 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 18:19:50,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:19:51,004 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 11 [2022-07-12 18:19:51,006 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 20 treesize of output 18 [2022-07-12 18:19:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 18:19:51,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807524097] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:19:51,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:19:51,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 43 [2022-07-12 18:19:51,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832670864] [2022-07-12 18:19:51,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:19:51,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 18:19:51,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:19:51,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 18:19:51,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 18:19:51,361 INFO L87 Difference]: Start difference. First operand 1073 states and 1216 transitions. Second operand has 43 states, 43 states have (on average 3.3255813953488373) internal successors, (143), 43 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:52,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:19:52,643 INFO L93 Difference]: Finished difference Result 1169 states and 1305 transitions. [2022-07-12 18:19:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-12 18:19:52,644 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.3255813953488373) internal successors, (143), 43 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-12 18:19:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:19:52,646 INFO L225 Difference]: With dead ends: 1169 [2022-07-12 18:19:52,646 INFO L226 Difference]: Without dead ends: 1159 [2022-07-12 18:19:52,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1661, Invalid=4501, Unknown=0, NotChecked=0, Total=6162 [2022-07-12 18:19:52,647 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 543 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:19:52,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 428 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 674 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-07-12 18:19:52,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-07-12 18:19:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1055. [2022-07-12 18:19:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1052 states have (on average 1.1359315589353611) internal successors, (1195), 1054 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1195 transitions. [2022-07-12 18:19:52,655 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1195 transitions. Word has length 73 [2022-07-12 18:19:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:19:52,655 INFO L495 AbstractCegarLoop]: Abstraction has 1055 states and 1195 transitions. [2022-07-12 18:19:52,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.3255813953488373) internal successors, (143), 43 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1195 transitions. [2022-07-12 18:19:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 18:19:52,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:19:52,656 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:19:52,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-12 18:19:52,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-07-12 18:19:52,857 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:19:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:19:52,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1397249283, now seen corresponding path program 13 times [2022-07-12 18:19:52,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:19:52,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760802039] [2022-07-12 18:19:52,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:19:52,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:19:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:19:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 18:19:53,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:19:53,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760802039] [2022-07-12 18:19:53,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760802039] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:19:53,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808916400] [2022-07-12 18:19:53,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:19:53,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:19:53,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:19:53,602 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:19:53,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-12 18:19:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:19:53,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-12 18:19:53,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:19:54,241 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 14 treesize of output 10 [2022-07-12 18:19:54,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:54,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:54,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:54,489 INFO L356 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2022-07-12 18:19:54,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 31 [2022-07-12 18:19:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 18 proven. 81 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 18:19:54,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:19:54,644 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 44 treesize of output 38 [2022-07-12 18:19:54,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:54,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:54,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:19:54,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 60 [2022-07-12 18:19:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 33 proven. 66 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 18:19:55,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808916400] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:19:55,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:19:55,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 58 [2022-07-12 18:19:55,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167592792] [2022-07-12 18:19:55,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:19:55,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-12 18:19:55,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:19:55,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-12 18:19:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2899, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 18:19:55,347 INFO L87 Difference]: Start difference. First operand 1055 states and 1195 transitions. Second operand has 58 states, 58 states have (on average 2.706896551724138) internal successors, (157), 58 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:57,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:19:57,028 INFO L93 Difference]: Finished difference Result 1085 states and 1217 transitions. [2022-07-12 18:19:57,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 18:19:57,033 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.706896551724138) internal successors, (157), 58 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-12 18:19:57,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:19:57,036 INFO L225 Difference]: With dead ends: 1085 [2022-07-12 18:19:57,036 INFO L226 Difference]: Without dead ends: 1067 [2022-07-12 18:19:57,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=880, Invalid=5440, Unknown=0, NotChecked=0, Total=6320 [2022-07-12 18:19:57,037 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 555 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:19:57,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 532 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 831 Invalid, 0 Unknown, 73 Unchecked, 0.4s Time] [2022-07-12 18:19:57,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2022-07-12 18:19:57,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1025. [2022-07-12 18:19:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1022 states have (on average 1.1350293542074363) internal successors, (1160), 1024 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1160 transitions. [2022-07-12 18:19:57,048 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1160 transitions. Word has length 73 [2022-07-12 18:19:57,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:19:57,048 INFO L495 AbstractCegarLoop]: Abstraction has 1025 states and 1160 transitions. [2022-07-12 18:19:57,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.706896551724138) internal successors, (157), 58 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:19:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1160 transitions. [2022-07-12 18:19:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 18:19:57,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:19:57,050 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:19:57,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-07-12 18:19:57,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-07-12 18:19:57,274 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:19:57,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:19:57,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1443085943, now seen corresponding path program 14 times [2022-07-12 18:19:57,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:19:57,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913770391] [2022-07-12 18:19:57,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:19:57,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:19:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:19:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 20 proven. 117 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:19:58,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:19:58,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913770391] [2022-07-12 18:19:58,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913770391] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:19:58,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734289408] [2022-07-12 18:19:58,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:19:58,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:19:58,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:19:58,140 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:19:58,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-12 18:19:58,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:19:58,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:19:58,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-12 18:19:58,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:19:58,332 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:19:58,332 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:19:58,574 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 14 treesize of output 10 [2022-07-12 18:19:59,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:59,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:59,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:59,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:59,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:59,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:59,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:59,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:59,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:59,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:19:59,183 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-07-12 18:19:59,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 62 [2022-07-12 18:19:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 57 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-12 18:19:59,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:20:00,435 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 74 treesize of output 64 [2022-07-12 18:20:00,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:00,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:00,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:00,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:00,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:00,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:00,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:00,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:00,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:00,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:00,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-07-12 18:20:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-12 18:20:01,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734289408] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:20:01,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:20:01,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21, 21] total 67 [2022-07-12 18:20:01,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245375671] [2022-07-12 18:20:01,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:20:01,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-12 18:20:01,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:20:01,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-12 18:20:01,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=4086, Unknown=0, NotChecked=0, Total=4422 [2022-07-12 18:20:01,154 INFO L87 Difference]: Start difference. First operand 1025 states and 1160 transitions. Second operand has 67 states, 67 states have (on average 2.298507462686567) internal successors, (154), 67 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:20:05,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:20:05,757 INFO L93 Difference]: Finished difference Result 1333 states and 1487 transitions. [2022-07-12 18:20:05,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-12 18:20:05,758 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.298507462686567) internal successors, (154), 67 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-12 18:20:05,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:20:05,760 INFO L225 Difference]: With dead ends: 1333 [2022-07-12 18:20:05,760 INFO L226 Difference]: Without dead ends: 1087 [2022-07-12 18:20:05,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4156 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1302, Invalid=15468, Unknown=0, NotChecked=0, Total=16770 [2022-07-12 18:20:05,761 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 325 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:20:05,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 737 Invalid, 2381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2178 Invalid, 0 Unknown, 104 Unchecked, 1.0s Time] [2022-07-12 18:20:05,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-07-12 18:20:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 899. [2022-07-12 18:20:05,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 896 states have (on average 1.1194196428571428) internal successors, (1003), 898 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:20:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1003 transitions. [2022-07-12 18:20:05,788 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1003 transitions. Word has length 73 [2022-07-12 18:20:05,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:20:05,788 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1003 transitions. [2022-07-12 18:20:05,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.298507462686567) internal successors, (154), 67 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:20:05,789 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1003 transitions. [2022-07-12 18:20:05,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-12 18:20:05,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:20:05,789 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:20:05,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-12 18:20:05,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-07-12 18:20:05,990 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:20:05,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:20:05,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1581183415, now seen corresponding path program 13 times [2022-07-12 18:20:05,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:20:05,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233265548] [2022-07-12 18:20:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:20:05,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:20:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:20:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 123 proven. 251 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:20:08,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:20:08,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233265548] [2022-07-12 18:20:08,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233265548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:20:08,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999824806] [2022-07-12 18:20:08,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:20:08,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:20:08,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:20:08,396 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:20:08,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-12 18:20:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:20:08,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 107 conjunts are in the unsatisfiable core [2022-07-12 18:20:08,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:20:09,511 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 14 treesize of output 10 [2022-07-12 18:20:12,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:20:12,278 INFO L356 Elim1Store]: treesize reduction 69, result has 51.4 percent of original size [2022-07-12 18:20:12,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 55 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 118 treesize of output 119 [2022-07-12 18:20:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 33 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:20:12,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:20:12,960 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 164 treesize of output 142 [2022-07-12 18:20:12,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:12,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 228 [2022-07-12 18:20:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 143 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:20:14,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999824806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:20:14,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:20:14,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 98 [2022-07-12 18:20:14,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179024321] [2022-07-12 18:20:14,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:20:14,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-07-12 18:20:14,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:20:14,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-07-12 18:20:14,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=913, Invalid=8593, Unknown=0, NotChecked=0, Total=9506 [2022-07-12 18:20:14,878 INFO L87 Difference]: Start difference. First operand 899 states and 1003 transitions. Second operand has 98 states, 98 states have (on average 2.142857142857143) internal successors, (210), 98 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:20:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:20:18,059 INFO L93 Difference]: Finished difference Result 1275 states and 1420 transitions. [2022-07-12 18:20:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-12 18:20:18,059 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.142857142857143) internal successors, (210), 98 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-12 18:20:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:20:18,061 INFO L225 Difference]: With dead ends: 1275 [2022-07-12 18:20:18,061 INFO L226 Difference]: Without dead ends: 1195 [2022-07-12 18:20:18,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6570 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2459, Invalid=18711, Unknown=0, NotChecked=0, Total=21170 [2022-07-12 18:20:18,063 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 689 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:20:18,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 450 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 691 Invalid, 0 Unknown, 190 Unchecked, 0.5s Time] [2022-07-12 18:20:18,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-07-12 18:20:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 923. [2022-07-12 18:20:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 920 states have (on average 1.1195652173913044) internal successors, (1030), 922 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:20:18,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1030 transitions. [2022-07-12 18:20:18,069 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1030 transitions. Word has length 81 [2022-07-12 18:20:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:20:18,069 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1030 transitions. [2022-07-12 18:20:18,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.142857142857143) internal successors, (210), 98 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:20:18,069 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1030 transitions. [2022-07-12 18:20:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 18:20:18,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:20:18,070 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:20:18,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-12 18:20:18,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:20:18,283 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:20:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:20:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2054527358, now seen corresponding path program 4 times [2022-07-12 18:20:18,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:20:18,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566269182] [2022-07-12 18:20:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:20:18,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:20:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:20:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-12 18:20:18,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:20:18,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566269182] [2022-07-12 18:20:18,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566269182] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:20:18,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873716583] [2022-07-12 18:20:18,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:20:18,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:20:18,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:20:18,460 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:20:18,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-12 18:20:18,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:20:18,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:20:18,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-12 18:20:18,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:20:18,679 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:20:18,679 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:20:18,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:20:19,007 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 13 treesize of output 9 [2022-07-12 18:20:19,518 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 14 treesize of output 10 [2022-07-12 18:20:19,559 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 25 treesize of output 24 [2022-07-12 18:20:19,879 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-07-12 18:20:19,886 INFO L356 Elim1Store]: treesize reduction 3, result has 72.7 percent of original size [2022-07-12 18:20:19,887 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 15 treesize of output 16 [2022-07-12 18:20:19,995 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 17 treesize of output 19 [2022-07-12 18:20:20,112 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 17 treesize of output 19 [2022-07-12 18:20:20,211 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 17 treesize of output 19 [2022-07-12 18:20:20,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:20,299 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:20:20,300 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-12 18:20:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 42 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:20:20,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:20:20,390 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-07-12 18:20:20,394 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:20:20,398 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int)) (v_ArrVal_2510 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2510) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:20:20,404 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:20:20,408 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int)) (v_ArrVal_2509 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2509) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:20:20,413 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:20:20,417 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int)) (v_ArrVal_2508 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2508) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:20:20,431 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:20:20,437 WARN L833 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_cstrcat_#t~mem2#1| 0) (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0))) is different from false [2022-07-12 18:20:20,488 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_cstrcat_~s~0#1.offset_421| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrcat_~s~0#1.offset_421|)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) |v_ULTIMATE.start_cstrcat_~s~0#1.offset_421|) 0) (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrcat_~s~0#1.offset_421|))) (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0))) is different from false [2022-07-12 18:20:20,496 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_cstrcat_~s~0#1.offset_421| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrcat_~s~0#1.offset_421|)) (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrcat_~s~0#1.offset_421|) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~length3~0#1| (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0) |v_ULTIMATE.start_cstrcat_~s~0#1.offset_421|) 0))) (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0))) is different from false [2022-07-12 18:20:20,502 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:20:20,503 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2022-07-12 18:20:20,507 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:20:20,508 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 52 [2022-07-12 18:20:20,511 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 11 treesize of output 7 [2022-07-12 18:20:20,524 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 20 treesize of output 18 [2022-07-12 18:20:20,538 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:20:20,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 77 [2022-07-12 18:20:23,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:20:23,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:20:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 55 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 41 not checked. [2022-07-12 18:20:23,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873716583] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:20:23,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:20:23,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 32, 32] total 75 [2022-07-12 18:20:23,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263167902] [2022-07-12 18:20:23,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:20:23,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-12 18:20:23,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:20:23,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-12 18:20:23,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=3695, Unknown=11, NotChecked=1474, Total=5550 [2022-07-12 18:20:23,992 INFO L87 Difference]: Start difference. First operand 923 states and 1030 transitions. Second operand has 75 states, 75 states have (on average 2.8266666666666667) internal successors, (212), 75 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:20:27,132 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) (= 0 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (<= 6 (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) is different from false [2022-07-12 18:20:27,977 WARN L833 $PredicateComparison]: unable to prove that (and (<= 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (forall ((v_ArrVal_2511 (Array Int Int)) (v_ArrVal_2510 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2510) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) (<= (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) is different from false [2022-07-12 18:20:28,043 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2511 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2511) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) (<= 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (<= (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|) (select |c_#length| |c_ULTIMATE.start_cstrcat_~s2#1.base|))) is different from false [2022-07-12 18:20:28,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:20:28,416 INFO L93 Difference]: Finished difference Result 993 states and 1094 transitions. [2022-07-12 18:20:28,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-12 18:20:28,416 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.8266666666666667) internal successors, (212), 75 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-12 18:20:28,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:20:28,419 INFO L225 Difference]: With dead ends: 993 [2022-07-12 18:20:28,419 INFO L226 Difference]: Without dead ends: 949 [2022-07-12 18:20:28,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 3275 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1521, Invalid=12669, Unknown=146, NotChecked=3486, Total=17822 [2022-07-12 18:20:28,421 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 283 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 4022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2141 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:20:28,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 1184 Invalid, 4022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1811 Invalid, 0 Unknown, 2141 Unchecked, 0.9s Time] [2022-07-12 18:20:28,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-07-12 18:20:28,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 923. [2022-07-12 18:20:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 920 states have (on average 1.117391304347826) internal successors, (1028), 922 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:20:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1028 transitions. [2022-07-12 18:20:28,430 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1028 transitions. Word has length 82 [2022-07-12 18:20:28,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:20:28,430 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1028 transitions. [2022-07-12 18:20:28,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.8266666666666667) internal successors, (212), 75 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:20:28,431 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1028 transitions. [2022-07-12 18:20:28,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-12 18:20:28,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:20:28,432 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:20:28,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-12 18:20:28,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:20:28,633 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:20:28,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:20:28,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1945200858, now seen corresponding path program 14 times [2022-07-12 18:20:28,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:20:28,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306223665] [2022-07-12 18:20:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:20:28,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:20:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:20:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:20:29,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:20:29,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306223665] [2022-07-12 18:20:29,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306223665] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:20:29,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98775812] [2022-07-12 18:20:29,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:20:29,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:20:29,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:20:29,156 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:20:29,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-12 18:20:29,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:20:29,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:20:29,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-12 18:20:29,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:20:29,375 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:20:29,376 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:20:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 231 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:20:30,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:20:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 276 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:20:31,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98775812] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:20:31,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:20:31,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 84 [2022-07-12 18:20:31,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990689039] [2022-07-12 18:20:31,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:20:31,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-12 18:20:31,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:20:31,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-12 18:20:31,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=896, Invalid=6244, Unknown=0, NotChecked=0, Total=7140 [2022-07-12 18:20:31,417 INFO L87 Difference]: Start difference. First operand 923 states and 1028 transitions. Second operand has 85 states, 84 states have (on average 2.9166666666666665) internal successors, (245), 85 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:20:33,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:20:33,549 INFO L93 Difference]: Finished difference Result 2224 states and 2401 transitions. [2022-07-12 18:20:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 18:20:33,550 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 2.9166666666666665) internal successors, (245), 85 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-07-12 18:20:33,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:20:33,554 INFO L225 Difference]: With dead ends: 2224 [2022-07-12 18:20:33,554 INFO L226 Difference]: Without dead ends: 2224 [2022-07-12 18:20:33,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3562 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2297, Invalid=9913, Unknown=0, NotChecked=0, Total=12210 [2022-07-12 18:20:33,555 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 528 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 4090 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 4238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 4090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:20:33,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 1514 Invalid, 4238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 4090 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-12 18:20:33,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2022-07-12 18:20:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 935. [2022-07-12 18:20:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 932 states have (on average 1.121244635193133) internal successors, (1045), 934 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:20:33,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1045 transitions. [2022-07-12 18:20:33,566 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1045 transitions. Word has length 85 [2022-07-12 18:20:33,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:20:33,566 INFO L495 AbstractCegarLoop]: Abstraction has 935 states and 1045 transitions. [2022-07-12 18:20:33,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 2.9166666666666665) internal successors, (245), 85 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:20:33,567 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1045 transitions. [2022-07-12 18:20:33,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-12 18:20:33,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:20:33,568 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:20:33,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-12 18:20:33,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:20:33,783 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:20:33,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:20:33,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1909828783, now seen corresponding path program 15 times [2022-07-12 18:20:33,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:20:33,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728977538] [2022-07-12 18:20:33,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:20:33,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:20:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:20:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 12 proven. 125 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 18:20:34,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:20:34,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728977538] [2022-07-12 18:20:34,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728977538] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:20:34,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080345956] [2022-07-12 18:20:34,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:20:34,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:20:34,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:20:34,334 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:20:34,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-12 18:20:34,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 18:20:34,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:20:34,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-12 18:20:34,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:20:34,634 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:20:34,634 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:20:34,931 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 14 treesize of output 10 [2022-07-12 18:20:37,266 INFO L356 Elim1Store]: treesize reduction 5, result has 91.4 percent of original size [2022-07-12 18:20:37,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 67 [2022-07-12 18:20:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-12 18:20:37,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:20:38,622 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 40 treesize of output 34 [2022-07-12 18:20:38,635 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:20:38,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 76 [2022-07-12 18:20:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-12 18:20:39,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080345956] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:20:39,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:20:39,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 64 [2022-07-12 18:20:39,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371400019] [2022-07-12 18:20:39,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:20:39,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-12 18:20:39,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:20:39,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-12 18:20:39,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=3688, Unknown=1, NotChecked=0, Total=4032 [2022-07-12 18:20:39,432 INFO L87 Difference]: Start difference. First operand 935 states and 1045 transitions. Second operand has 64 states, 64 states have (on average 2.84375) internal successors, (182), 64 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:20:43,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:20:43,289 INFO L93 Difference]: Finished difference Result 1060 states and 1170 transitions. [2022-07-12 18:20:43,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-12 18:20:43,290 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.84375) internal successors, (182), 64 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-07-12 18:20:43,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:20:43,292 INFO L225 Difference]: With dead ends: 1060 [2022-07-12 18:20:43,292 INFO L226 Difference]: Without dead ends: 1013 [2022-07-12 18:20:43,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3847 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1397, Invalid=13608, Unknown=1, NotChecked=0, Total=15006 [2022-07-12 18:20:43,293 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 274 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:20:43,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 757 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1861 Invalid, 0 Unknown, 499 Unchecked, 0.8s Time] [2022-07-12 18:20:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-07-12 18:20:43,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 934. [2022-07-12 18:20:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 931 states have (on average 1.1117078410311494) internal successors, (1035), 933 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:20:43,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1035 transitions. [2022-07-12 18:20:43,299 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1035 transitions. Word has length 85 [2022-07-12 18:20:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:20:43,299 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1035 transitions. [2022-07-12 18:20:43,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.84375) internal successors, (182), 64 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:20:43,300 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1035 transitions. [2022-07-12 18:20:43,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-12 18:20:43,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:20:43,301 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:20:43,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-12 18:20:43,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-07-12 18:20:43,507 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:20:43,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:20:43,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1027250177, now seen corresponding path program 15 times [2022-07-12 18:20:43,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:20:43,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273863771] [2022-07-12 18:20:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:20:43,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:20:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:20:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 146 proven. 298 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:20:45,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:20:45,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273863771] [2022-07-12 18:20:45,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273863771] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:20:45,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237587033] [2022-07-12 18:20:45,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:20:45,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:20:45,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:20:45,715 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:20:45,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-12 18:20:45,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-07-12 18:20:45,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:20:45,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 131 conjunts are in the unsatisfiable core [2022-07-12 18:20:45,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:20:46,708 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 14 treesize of output 10 [2022-07-12 18:20:48,869 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:20:48,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 103 treesize of output 51 [2022-07-12 18:20:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 36 proven. 408 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:20:48,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:20:49,320 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 179 treesize of output 155 [2022-07-12 18:20:49,343 INFO L356 Elim1Store]: treesize reduction 770, result has 0.1 percent of original size [2022-07-12 18:20:49,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 295 treesize of output 249 [2022-07-12 18:20:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 168 proven. 276 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:20:51,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237587033] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:20:51,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:20:51,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 97 [2022-07-12 18:20:51,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155411510] [2022-07-12 18:20:51,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:20:51,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-12 18:20:51,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:20:51,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-12 18:20:51,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=8381, Unknown=0, NotChecked=0, Total=9312 [2022-07-12 18:20:51,832 INFO L87 Difference]: Start difference. First operand 934 states and 1035 transitions. Second operand has 97 states, 97 states have (on average 2.2061855670103094) internal successors, (214), 97 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:21:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:21:28,769 INFO L93 Difference]: Finished difference Result 2362 states and 2533 transitions. [2022-07-12 18:21:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2022-07-12 18:21:28,770 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.2061855670103094) internal successors, (214), 97 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-07-12 18:21:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:21:28,772 INFO L225 Difference]: With dead ends: 2362 [2022-07-12 18:21:28,772 INFO L226 Difference]: Without dead ends: 2335 [2022-07-12 18:21:28,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33139 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=11325, Invalid=86331, Unknown=0, NotChecked=0, Total=97656 [2022-07-12 18:21:28,776 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 984 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 9485 mSolverCounterSat, 897 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 10382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 897 IncrementalHoareTripleChecker+Valid, 9485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:21:28,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 1423 Invalid, 10382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [897 Valid, 9485 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-07-12 18:21:28,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2022-07-12 18:21:28,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 1093. [2022-07-12 18:21:28,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1090 states have (on average 1.114678899082569) internal successors, (1215), 1092 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:21:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1215 transitions. [2022-07-12 18:21:28,787 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1215 transitions. Word has length 87 [2022-07-12 18:21:28,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:21:28,788 INFO L495 AbstractCegarLoop]: Abstraction has 1093 states and 1215 transitions. [2022-07-12 18:21:28,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.2061855670103094) internal successors, (214), 97 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:21:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1215 transitions. [2022-07-12 18:21:28,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-12 18:21:28,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:21:28,789 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:21:28,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-12 18:21:29,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-07-12 18:21:29,003 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:21:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:21:29,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1165127411, now seen corresponding path program 5 times [2022-07-12 18:21:29,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:21:29,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059450901] [2022-07-12 18:21:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:21:29,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:21:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:21:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 195 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:21:29,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:21:29,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059450901] [2022-07-12 18:21:29,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059450901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:21:29,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027641927] [2022-07-12 18:21:29,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:21:29,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:21:29,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:21:29,772 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:21:29,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-12 18:21:30,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-12 18:21:30,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:21:30,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 147 conjunts are in the unsatisfiable core [2022-07-12 18:21:30,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:21:30,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:21:31,433 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 14 treesize of output 10 [2022-07-12 18:21:31,486 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 25 treesize of output 24 [2022-07-12 18:21:31,835 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-07-12 18:21:31,841 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-07-12 18:21:31,841 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 12 [2022-07-12 18:21:31,953 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 16 treesize of output 18 [2022-07-12 18:21:32,075 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 16 treesize of output 18 [2022-07-12 18:21:32,196 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 16 treesize of output 18 [2022-07-12 18:21:32,309 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 16 treesize of output 18 [2022-07-12 18:21:32,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:21:32,416 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:21:32,416 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-07-12 18:21:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:21:32,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:21:32,426 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2830 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2830) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-07-12 18:21:32,430 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2830 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2830) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:21:32,434 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2830 (Array Int Int)) (v_ArrVal_2829 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2829) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2830) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:21:32,439 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2830 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2830) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:21:32,444 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2830 (Array Int Int)) (v_ArrVal_2828 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2828) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2830) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:21:32,448 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2830 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2830) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:21:32,452 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2830 (Array Int Int)) (v_ArrVal_2827 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2827) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2830) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:21:32,456 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2830 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2830) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:21:32,460 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2830 (Array Int Int)) (v_ArrVal_2826 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2826) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2830) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:21:32,465 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2830 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2830) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-07-12 18:21:32,471 WARN L833 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_cstrcat_#t~mem2#1| 0) (forall ((v_ArrVal_2830 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2830) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0))) is different from false [2022-07-12 18:21:32,475 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2830 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2830) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base|) |c_ULTIMATE.start_cstrcat_~s~0#1.offset|) 0)) is different from false [2022-07-12 18:21:32,479 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2830 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2830) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) is different from false [2022-07-12 18:21:32,547 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:21:32,548 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 37 [2022-07-12 18:21:32,552 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:21:32,552 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 52 [2022-07-12 18:21:32,555 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 11 treesize of output 7 [2022-07-12 18:21:32,560 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 20 treesize of output 18 [2022-07-12 18:21:32,572 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:21:32,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 73 [2022-07-12 18:21:34,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:21:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 61 not checked. [2022-07-12 18:21:34,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027641927] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:21:34,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:21:34,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 36] total 97 [2022-07-12 18:21:34,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933527834] [2022-07-12 18:21:34,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:21:34,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-12 18:21:34,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:21:34,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-12 18:21:34,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=588, Invalid=6412, Unknown=24, NotChecked=2288, Total=9312 [2022-07-12 18:21:34,105 INFO L87 Difference]: Start difference. First operand 1093 states and 1215 transitions. Second operand has 97 states, 97 states have (on average 2.5670103092783507) internal successors, (249), 97 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:21:38,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:21:38,145 INFO L93 Difference]: Finished difference Result 1572 states and 1753 transitions. [2022-07-12 18:21:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-12 18:21:38,145 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.5670103092783507) internal successors, (249), 97 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-07-12 18:21:38,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:21:38,147 INFO L225 Difference]: With dead ends: 1572 [2022-07-12 18:21:38,147 INFO L226 Difference]: Without dead ends: 1417 [2022-07-12 18:21:38,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 121 SyntacticMatches, 14 SemanticMatches, 155 ConstructedPredicates, 13 IntricatePredicates, 3 DeprecatedPredicates, 6832 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1821, Invalid=18797, Unknown=26, NotChecked=3848, Total=24492 [2022-07-12 18:21:38,148 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 674 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 2747 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 2380 SdHoareTripleChecker+Invalid, 7002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4074 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:21:38,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 2380 Invalid, 7002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2747 Invalid, 0 Unknown, 4074 Unchecked, 1.1s Time] [2022-07-12 18:21:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2022-07-12 18:21:38,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1295. [2022-07-12 18:21:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1292 states have (on average 1.1284829721362228) internal successors, (1458), 1294 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:21:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1458 transitions. [2022-07-12 18:21:38,160 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1458 transitions. Word has length 90 [2022-07-12 18:21:38,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:21:38,160 INFO L495 AbstractCegarLoop]: Abstraction has 1295 states and 1458 transitions. [2022-07-12 18:21:38,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.5670103092783507) internal successors, (249), 97 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:21:38,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1458 transitions. [2022-07-12 18:21:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 18:21:38,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:21:38,161 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:21:38,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-07-12 18:21:38,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:21:38,369 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-12 18:21:38,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:21:38,369 INFO L85 PathProgramCache]: Analyzing trace with hash -108128484, now seen corresponding path program 16 times [2022-07-12 18:21:38,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:21:38,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697259518] [2022-07-12 18:21:38,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:21:38,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:21:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:21:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 231 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:21:38,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:21:38,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697259518] [2022-07-12 18:21:38,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697259518] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:21:38,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158212238] [2022-07-12 18:21:38,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:21:38,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:21:38,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:21:38,814 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:21:38,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-12 18:21:38,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:21:38,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:21:38,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 112 conjunts are in the unsatisfiable core [2022-07-12 18:21:38,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:21:39,041 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:21:39,042 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:21:39,250 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 14 treesize of output 10 [2022-07-12 18:21:41,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:21:41,461 INFO L356 Elim1Store]: treesize reduction 66, result has 57.4 percent of original size [2022-07-12 18:21:41,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 66 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 12 case distinctions, treesize of input 128 treesize of output 139