./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/test-0214_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext-properties/test-0214_1.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 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:46:30,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:46:30,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:46:30,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:46:30,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:46:30,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:46:30,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:46:30,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:46:30,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:46:30,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:46:30,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:46:30,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:46:30,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:46:30,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:46:30,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:46:30,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:46:30,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:46:30,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:46:30,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:46:30,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:46:30,169 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:46:30,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:46:30,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:46:30,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:46:30,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:46:30,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:46:30,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:46:30,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:46:30,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:46:30,178 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:46:30,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:46:30,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:46:30,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:46:30,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:46:30,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:46:30,182 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:46:30,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:46:30,183 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:46:30,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:46:30,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:46:30,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:46:30,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:46:30,187 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:46:30,212 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:46:30,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:46:30,213 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:46:30,213 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:46:30,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:46:30,214 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:46:30,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:46:30,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:46:30,215 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:46:30,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:46:30,215 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:46:30,216 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:46:30,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:46:30,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:46:30,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:46:30,216 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:46:30,216 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:46:30,216 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:46:30,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:46:30,217 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:46:30,217 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:46:30,217 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:46:30,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:46:30,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:46:30,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:46:30,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:46:30,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:46:30,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:46:30,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:46:30,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:46:30,218 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 [2022-07-12 18:46:30,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:46:30,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:46:30,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:46:30,444 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:46:30,445 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:46:30,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0214_1.i [2022-07-12 18:46:30,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a187aec8f/ffd70ea9fe1e41298e40d23d7b7a8079/FLAG119dafb53 [2022-07-12 18:46:30,928 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:46:30,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2022-07-12 18:46:30,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a187aec8f/ffd70ea9fe1e41298e40d23d7b7a8079/FLAG119dafb53 [2022-07-12 18:46:30,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a187aec8f/ffd70ea9fe1e41298e40d23d7b7a8079 [2022-07-12 18:46:30,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:46:30,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:46:30,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:46:30,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:46:30,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:46:30,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:46:30" (1/1) ... [2022-07-12 18:46:30,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bcccab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:30, skipping insertion in model container [2022-07-12 18:46:30,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:46:30" (1/1) ... [2022-07-12 18:46:30,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:46:31,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:46:31,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:46:31,310 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:46:31,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:46:31,365 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:46:31,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:31 WrapperNode [2022-07-12 18:46:31,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:46:31,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:46:31,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:46:31,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:46:31,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:31" (1/1) ... [2022-07-12 18:46:31,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:31" (1/1) ... [2022-07-12 18:46:31,414 INFO L137 Inliner]: procedures = 181, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 223 [2022-07-12 18:46:31,414 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:46:31,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:46:31,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:46:31,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:46:31,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:31" (1/1) ... [2022-07-12 18:46:31,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:31" (1/1) ... [2022-07-12 18:46:31,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:31" (1/1) ... [2022-07-12 18:46:31,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:31" (1/1) ... [2022-07-12 18:46:31,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:31" (1/1) ... [2022-07-12 18:46:31,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:31" (1/1) ... [2022-07-12 18:46:31,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:31" (1/1) ... [2022-07-12 18:46:31,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:46:31,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:46:31,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:46:31,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:46:31,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:31" (1/1) ... [2022-07-12 18:46:31,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:46:31,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:46:31,488 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 18:46:31,496 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 18:46:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-07-12 18:46:31,528 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-07-12 18:46:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 18:46:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:46:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:46:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:46:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:46:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:46:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 18:46:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 18:46:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:46:31,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:46:31,620 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:46:31,621 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:46:31,996 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:46:32,003 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:46:32,003 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 18:46:32,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:46:32 BoogieIcfgContainer [2022-07-12 18:46:32,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:46:32,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:46:32,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:46:32,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:46:32,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:46:30" (1/3) ... [2022-07-12 18:46:32,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418cf809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:46:32, skipping insertion in model container [2022-07-12 18:46:32,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:46:31" (2/3) ... [2022-07-12 18:46:32,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418cf809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:46:32, skipping insertion in model container [2022-07-12 18:46:32,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:46:32" (3/3) ... [2022-07-12 18:46:32,014 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2022-07-12 18:46:32,024 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:46:32,024 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2022-07-12 18:46:32,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:46:32,062 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@304790f6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@758b11c3 [2022-07-12 18:46:32,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2022-07-12 18:46:32,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 151 states, 90 states have (on average 1.9222222222222223) internal successors, (173), 147 states have internal predecessors, (173), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:46:32,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:46:32,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:32,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:46:32,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:32,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1044596682, now seen corresponding path program 1 times [2022-07-12 18:46:32,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:32,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304394298] [2022-07-12 18:46:32,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:32,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:32,208 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 18:46:32,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:32,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304394298] [2022-07-12 18:46:32,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304394298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:32,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:32,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:46:32,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179743877] [2022-07-12 18:46:32,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:32,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 18:46:32,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:32,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 18:46:32,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 18:46:32,236 INFO L87 Difference]: Start difference. First operand has 151 states, 90 states have (on average 1.9222222222222223) internal successors, (173), 147 states have internal predecessors, (173), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 18:46:32,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:32,253 INFO L93 Difference]: Finished difference Result 151 states and 172 transitions. [2022-07-12 18:46:32,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 18:46:32,255 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-07-12 18:46:32,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:32,260 INFO L225 Difference]: With dead ends: 151 [2022-07-12 18:46:32,261 INFO L226 Difference]: Without dead ends: 148 [2022-07-12 18:46:32,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 18:46:32,266 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:32,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:46:32,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-12 18:46:32,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-07-12 18:46:32,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 88 states have (on average 1.8636363636363635) internal successors, (164), 144 states have internal predecessors, (164), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:46:32,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 168 transitions. [2022-07-12 18:46:32,318 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 168 transitions. Word has length 6 [2022-07-12 18:46:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:32,319 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 168 transitions. [2022-07-12 18:46:32,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 18:46:32,320 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 168 transitions. [2022-07-12 18:46:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:46:32,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:32,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:32,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 18:46:32,321 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:32,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:32,322 INFO L85 PathProgramCache]: Analyzing trace with hash 594339757, now seen corresponding path program 1 times [2022-07-12 18:46:32,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:32,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638659067] [2022-07-12 18:46:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:32,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:32,364 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 18:46:32,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:32,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638659067] [2022-07-12 18:46:32,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638659067] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:32,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:32,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:46:32,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370981581] [2022-07-12 18:46:32,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:32,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:46:32,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:32,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:46:32,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:46:32,368 INFO L87 Difference]: Start difference. First operand 148 states and 168 transitions. Second operand has 4 states, 4 states have (on average 2.0) 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 18:46:32,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:32,426 INFO L93 Difference]: Finished difference Result 294 states and 333 transitions. [2022-07-12 18:46:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:46:32,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) 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 18:46:32,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:32,428 INFO L225 Difference]: With dead ends: 294 [2022-07-12 18:46:32,430 INFO L226 Difference]: Without dead ends: 294 [2022-07-12 18:46:32,431 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 18:46:32,432 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 163 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:32,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 485 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:46:32,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-12 18:46:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 150. [2022-07-12 18:46:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 90 states have (on average 1.8444444444444446) internal successors, (166), 146 states have internal predecessors, (166), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:46:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2022-07-12 18:46:32,445 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 8 [2022-07-12 18:46:32,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:32,445 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2022-07-12 18:46:32,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) 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 18:46:32,446 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2022-07-12 18:46:32,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:46:32,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:32,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:32,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 18:46:32,448 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:32,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:32,450 INFO L85 PathProgramCache]: Analyzing trace with hash 592492715, now seen corresponding path program 1 times [2022-07-12 18:46:32,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:32,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839840755] [2022-07-12 18:46:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:32,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:32,534 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 18:46:32,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:32,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839840755] [2022-07-12 18:46:32,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839840755] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:32,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:32,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-12 18:46:32,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128846603] [2022-07-12 18:46:32,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:32,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:46:32,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:32,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:46:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:46:32,538 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 18:46:32,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:32,673 INFO L93 Difference]: Finished difference Result 289 states and 328 transitions. [2022-07-12 18:46:32,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:46:32,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 18:46:32,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:32,676 INFO L225 Difference]: With dead ends: 289 [2022-07-12 18:46:32,677 INFO L226 Difference]: Without dead ends: 289 [2022-07-12 18:46:32,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 18:46:32,682 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 148 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:32,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 223 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:32,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-12 18:46:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 203. [2022-07-12 18:46:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 140 states have (on average 1.8285714285714285) internal successors, (256), 196 states have internal predecessors, (256), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:46:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 264 transitions. [2022-07-12 18:46:32,704 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 264 transitions. Word has length 8 [2022-07-12 18:46:32,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:32,704 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 264 transitions. [2022-07-12 18:46:32,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 18:46:32,704 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 264 transitions. [2022-07-12 18:46:32,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:46:32,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:32,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:32,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 18:46:32,706 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:32,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:32,709 INFO L85 PathProgramCache]: Analyzing trace with hash 592492716, now seen corresponding path program 1 times [2022-07-12 18:46:32,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:32,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350535051] [2022-07-12 18:46:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:32,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:32,785 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 18:46:32,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:32,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350535051] [2022-07-12 18:46:32,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350535051] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:32,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:32,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:46:32,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715037557] [2022-07-12 18:46:32,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:32,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:46:32,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:32,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:46:32,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:46:32,786 INFO L87 Difference]: Start difference. First operand 203 states and 264 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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 18:46:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:32,932 INFO L93 Difference]: Finished difference Result 360 states and 454 transitions. [2022-07-12 18:46:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:46:32,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 18:46:32,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:32,936 INFO L225 Difference]: With dead ends: 360 [2022-07-12 18:46:32,936 INFO L226 Difference]: Without dead ends: 360 [2022-07-12 18:46:32,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 18:46:32,940 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 151 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:32,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 371 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:32,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-12 18:46:32,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 288. [2022-07-12 18:46:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 219 states have (on average 1.7945205479452055) internal successors, (393), 277 states have internal predecessors, (393), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:46:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 409 transitions. [2022-07-12 18:46:32,969 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 409 transitions. Word has length 8 [2022-07-12 18:46:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:32,969 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 409 transitions. [2022-07-12 18:46:32,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 18:46:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 409 transitions. [2022-07-12 18:46:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:46:32,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:32,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:32,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 18:46:32,970 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:32,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:32,972 INFO L85 PathProgramCache]: Analyzing trace with hash 592492778, now seen corresponding path program 1 times [2022-07-12 18:46:32,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:32,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119902059] [2022-07-12 18:46:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:32,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:33,081 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 18:46:33,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:33,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119902059] [2022-07-12 18:46:33,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119902059] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:33,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:33,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:46:33,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574920217] [2022-07-12 18:46:33,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:33,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:46:33,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:33,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:46:33,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:46:33,086 INFO L87 Difference]: Start difference. First operand 288 states and 409 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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 18:46:33,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:33,220 INFO L93 Difference]: Finished difference Result 359 states and 452 transitions. [2022-07-12 18:46:33,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:46:33,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 18:46:33,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:33,222 INFO L225 Difference]: With dead ends: 359 [2022-07-12 18:46:33,222 INFO L226 Difference]: Without dead ends: 359 [2022-07-12 18:46:33,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 18:46:33,223 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 133 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:33,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 385 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:33,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-07-12 18:46:33,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 288. [2022-07-12 18:46:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 219 states have (on average 1.7945205479452055) internal successors, (393), 277 states have internal predecessors, (393), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:46:33,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 409 transitions. [2022-07-12 18:46:33,252 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 409 transitions. Word has length 8 [2022-07-12 18:46:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:33,252 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 409 transitions. [2022-07-12 18:46:33,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 18:46:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 409 transitions. [2022-07-12 18:46:33,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:46:33,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:33,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:33,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 18:46:33,253 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:33,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1364890281, now seen corresponding path program 1 times [2022-07-12 18:46:33,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:33,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135921892] [2022-07-12 18:46:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:33,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:33,287 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 18:46:33,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:33,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135921892] [2022-07-12 18:46:33,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135921892] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:33,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:33,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:46:33,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598851058] [2022-07-12 18:46:33,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:33,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:46:33,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:33,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:46:33,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:46:33,289 INFO L87 Difference]: Start difference. First operand 288 states and 409 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states 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 18:46:33,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:33,308 INFO L93 Difference]: Finished difference Result 391 states and 509 transitions. [2022-07-12 18:46:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:46:33,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-07-12 18:46:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:33,310 INFO L225 Difference]: With dead ends: 391 [2022-07-12 18:46:33,310 INFO L226 Difference]: Without dead ends: 391 [2022-07-12 18:46:33,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 18:46:33,311 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 139 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:33,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 328 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:46:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-07-12 18:46:33,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 290. [2022-07-12 18:46:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 221 states have (on average 1.7782805429864252) internal successors, (393), 279 states have internal predecessors, (393), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:46:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 409 transitions. [2022-07-12 18:46:33,320 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 409 transitions. Word has length 11 [2022-07-12 18:46:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:33,320 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 409 transitions. [2022-07-12 18:46:33,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states 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 18:46:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 409 transitions. [2022-07-12 18:46:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:46:33,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:33,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:33,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 18:46:33,321 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:33,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:33,321 INFO L85 PathProgramCache]: Analyzing trace with hash 638072979, now seen corresponding path program 1 times [2022-07-12 18:46:33,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:33,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819192928] [2022-07-12 18:46:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:33,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:33,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:33,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819192928] [2022-07-12 18:46:33,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819192928] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:33,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:33,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:46:33,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539704270] [2022-07-12 18:46:33,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:33,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:46:33,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:33,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:46:33,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:46:33,355 INFO L87 Difference]: Start difference. First operand 290 states and 409 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:33,427 INFO L93 Difference]: Finished difference Result 349 states and 466 transitions. [2022-07-12 18:46:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:46:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 18:46:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:33,430 INFO L225 Difference]: With dead ends: 349 [2022-07-12 18:46:33,430 INFO L226 Difference]: Without dead ends: 342 [2022-07-12 18:46:33,430 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 18:46:33,431 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 81 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:33,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 251 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:33,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-07-12 18:46:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 287. [2022-07-12 18:46:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 218 states have (on average 1.7798165137614679) internal successors, (388), 276 states have internal predecessors, (388), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:46:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 404 transitions. [2022-07-12 18:46:33,437 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 404 transitions. Word has length 12 [2022-07-12 18:46:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:33,437 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 404 transitions. [2022-07-12 18:46:33,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:46:33,437 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 404 transitions. [2022-07-12 18:46:33,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 18:46:33,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:33,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:33,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 18:46:33,438 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:33,439 INFO L85 PathProgramCache]: Analyzing trace with hash -529439982, now seen corresponding path program 1 times [2022-07-12 18:46:33,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:33,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302422748] [2022-07-12 18:46:33,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:33,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:33,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:33,480 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 18:46:33,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:33,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302422748] [2022-07-12 18:46:33,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302422748] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:33,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:33,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:46:33,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045356190] [2022-07-12 18:46:33,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:33,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:46:33,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:33,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:46:33,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:46:33,482 INFO L87 Difference]: Start difference. First operand 287 states and 404 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:33,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:33,498 INFO L93 Difference]: Finished difference Result 451 states and 620 transitions. [2022-07-12 18:46:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:46:33,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-12 18:46:33,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:33,500 INFO L225 Difference]: With dead ends: 451 [2022-07-12 18:46:33,500 INFO L226 Difference]: Without dead ends: 451 [2022-07-12 18:46:33,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 18:46:33,501 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 153 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:33,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 470 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:46:33,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-07-12 18:46:33,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 291. [2022-07-12 18:46:33,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 222 states have (on average 1.7567567567567568) internal successors, (390), 280 states have internal predecessors, (390), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:46:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 406 transitions. [2022-07-12 18:46:33,510 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 406 transitions. Word has length 14 [2022-07-12 18:46:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:33,511 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 406 transitions. [2022-07-12 18:46:33,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 406 transitions. [2022-07-12 18:46:33,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 18:46:33,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:33,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:33,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 18:46:33,514 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:33,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:33,515 INFO L85 PathProgramCache]: Analyzing trace with hash 279906644, now seen corresponding path program 1 times [2022-07-12 18:46:33,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:33,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853755386] [2022-07-12 18:46:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:33,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:33,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:33,577 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 18:46:33,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:33,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853755386] [2022-07-12 18:46:33,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853755386] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:33,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:33,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:46:33,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224305289] [2022-07-12 18:46:33,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:33,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:46:33,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:33,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:46:33,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:46:33,578 INFO L87 Difference]: Start difference. First operand 291 states and 406 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:33,754 INFO L93 Difference]: Finished difference Result 422 states and 514 transitions. [2022-07-12 18:46:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:46:33,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-12 18:46:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:33,756 INFO L225 Difference]: With dead ends: 422 [2022-07-12 18:46:33,756 INFO L226 Difference]: Without dead ends: 422 [2022-07-12 18:46:33,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 18:46:33,758 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 281 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:33,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 381 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:33,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-07-12 18:46:33,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 291. [2022-07-12 18:46:33,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 222 states have (on average 1.7297297297297298) internal successors, (384), 280 states have internal predecessors, (384), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:46:33,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 400 transitions. [2022-07-12 18:46:33,768 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 400 transitions. Word has length 14 [2022-07-12 18:46:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:33,768 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 400 transitions. [2022-07-12 18:46:33,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:33,769 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 400 transitions. [2022-07-12 18:46:33,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 18:46:33,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:33,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:33,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 18:46:33,770 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:33,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:33,770 INFO L85 PathProgramCache]: Analyzing trace with hash 279906645, now seen corresponding path program 1 times [2022-07-12 18:46:33,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:33,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748956364] [2022-07-12 18:46:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:33,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:33,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:33,873 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 18:46:33,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:33,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748956364] [2022-07-12 18:46:33,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748956364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:33,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:33,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:46:33,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974974167] [2022-07-12 18:46:33,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:33,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:46:33,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:33,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:46:33,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:46:33,875 INFO L87 Difference]: Start difference. First operand 291 states and 400 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:34,033 INFO L93 Difference]: Finished difference Result 331 states and 409 transitions. [2022-07-12 18:46:34,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:46:34,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-12 18:46:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:34,034 INFO L225 Difference]: With dead ends: 331 [2022-07-12 18:46:34,034 INFO L226 Difference]: Without dead ends: 331 [2022-07-12 18:46:34,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:46:34,036 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 103 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:34,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 657 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:34,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-07-12 18:46:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 295. [2022-07-12 18:46:34,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 226 states have (on average 1.7212389380530972) internal successors, (389), 282 states have internal predecessors, (389), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:46:34,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 405 transitions. [2022-07-12 18:46:34,044 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 405 transitions. Word has length 14 [2022-07-12 18:46:34,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:34,044 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 405 transitions. [2022-07-12 18:46:34,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:34,045 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 405 transitions. [2022-07-12 18:46:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:46:34,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:34,046 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 18:46:34,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 18:46:34,046 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:34,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:34,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1443078130, now seen corresponding path program 1 times [2022-07-12 18:46:34,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:34,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120800728] [2022-07-12 18:46:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:34,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:34,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:46:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:34,085 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 18:46:34,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:34,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120800728] [2022-07-12 18:46:34,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120800728] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:34,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:34,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:46:34,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140095607] [2022-07-12 18:46:34,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:34,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:46:34,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:34,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:46:34,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:46:34,088 INFO L87 Difference]: Start difference. First operand 295 states and 405 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:34,230 INFO L93 Difference]: Finished difference Result 482 states and 619 transitions. [2022-07-12 18:46:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:46:34,230 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-12 18:46:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:34,232 INFO L225 Difference]: With dead ends: 482 [2022-07-12 18:46:34,232 INFO L226 Difference]: Without dead ends: 482 [2022-07-12 18:46:34,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 18:46:34,233 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 272 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:34,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 388 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:34,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-07-12 18:46:34,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 301. [2022-07-12 18:46:34,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 232 states have (on average 1.7025862068965518) internal successors, (395), 288 states have internal predecessors, (395), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:46:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 411 transitions. [2022-07-12 18:46:34,239 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 411 transitions. Word has length 17 [2022-07-12 18:46:34,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:34,239 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 411 transitions. [2022-07-12 18:46:34,239 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 411 transitions. [2022-07-12 18:46:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:46:34,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:34,242 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 18:46:34,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 18:46:34,242 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:34,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:34,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1443078131, now seen corresponding path program 1 times [2022-07-12 18:46:34,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:34,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252122131] [2022-07-12 18:46:34,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:34,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:34,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:46:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:34,298 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 18:46:34,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:34,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252122131] [2022-07-12 18:46:34,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252122131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:34,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:34,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:46:34,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193265176] [2022-07-12 18:46:34,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:34,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:46:34,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:34,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:46:34,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:46:34,300 INFO L87 Difference]: Start difference. First operand 301 states and 411 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:34,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:34,413 INFO L93 Difference]: Finished difference Result 350 states and 431 transitions. [2022-07-12 18:46:34,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:46:34,413 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-12 18:46:34,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:34,415 INFO L225 Difference]: With dead ends: 350 [2022-07-12 18:46:34,415 INFO L226 Difference]: Without dead ends: 350 [2022-07-12 18:46:34,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 18:46:34,416 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 190 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:34,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 392 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:34,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-07-12 18:46:34,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 301. [2022-07-12 18:46:34,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 232 states have (on average 1.6767241379310345) internal successors, (389), 288 states have internal predecessors, (389), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:46:34,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 405 transitions. [2022-07-12 18:46:34,422 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 405 transitions. Word has length 17 [2022-07-12 18:46:34,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:34,423 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 405 transitions. [2022-07-12 18:46:34,424 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:34,424 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 405 transitions. [2022-07-12 18:46:34,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:46:34,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:34,426 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 18:46:34,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 18:46:34,426 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:34,426 INFO L85 PathProgramCache]: Analyzing trace with hash 534459326, now seen corresponding path program 1 times [2022-07-12 18:46:34,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:34,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517919460] [2022-07-12 18:46:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:34,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:34,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:34,445 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 18:46:34,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:34,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517919460] [2022-07-12 18:46:34,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517919460] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:34,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:34,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:46:34,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189628086] [2022-07-12 18:46:34,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:34,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:46:34,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:34,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:46:34,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:46:34,446 INFO L87 Difference]: Start difference. First operand 301 states and 405 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:34,512 INFO L93 Difference]: Finished difference Result 397 states and 512 transitions. [2022-07-12 18:46:34,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:46:34,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-07-12 18:46:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:34,514 INFO L225 Difference]: With dead ends: 397 [2022-07-12 18:46:34,514 INFO L226 Difference]: Without dead ends: 397 [2022-07-12 18:46:34,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 18:46:34,515 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 141 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:34,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 281 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-07-12 18:46:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 298. [2022-07-12 18:46:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 232 states have (on average 1.6508620689655173) internal successors, (383), 285 states have internal predecessors, (383), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:46:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 399 transitions. [2022-07-12 18:46:34,520 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 399 transitions. Word has length 20 [2022-07-12 18:46:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:34,520 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 399 transitions. [2022-07-12 18:46:34,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 399 transitions. [2022-07-12 18:46:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:46:34,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:34,521 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 18:46:34,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 18:46:34,521 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:34,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:34,522 INFO L85 PathProgramCache]: Analyzing trace with hash 534459327, now seen corresponding path program 1 times [2022-07-12 18:46:34,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:34,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025305239] [2022-07-12 18:46:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:34,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:34,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:34,553 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 18:46:34,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:34,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025305239] [2022-07-12 18:46:34,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025305239] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:34,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:34,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:46:34,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285887321] [2022-07-12 18:46:34,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:34,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:46:34,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:34,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:46:34,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:46:34,555 INFO L87 Difference]: Start difference. First operand 298 states and 399 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:34,675 INFO L93 Difference]: Finished difference Result 517 states and 636 transitions. [2022-07-12 18:46:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:46:34,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-07-12 18:46:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:34,677 INFO L225 Difference]: With dead ends: 517 [2022-07-12 18:46:34,677 INFO L226 Difference]: Without dead ends: 517 [2022-07-12 18:46:34,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 18:46:34,678 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 376 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:34,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 456 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-07-12 18:46:34,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 301. [2022-07-12 18:46:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 236 states have (on average 1.63135593220339) internal successors, (385), 288 states have internal predecessors, (385), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:46:34,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 401 transitions. [2022-07-12 18:46:34,683 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 401 transitions. Word has length 20 [2022-07-12 18:46:34,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:34,683 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 401 transitions. [2022-07-12 18:46:34,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:34,684 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 401 transitions. [2022-07-12 18:46:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 18:46:34,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:34,684 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 18:46:34,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 18:46:34,684 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:34,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:34,685 INFO L85 PathProgramCache]: Analyzing trace with hash -611630038, now seen corresponding path program 1 times [2022-07-12 18:46:34,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:34,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162826874] [2022-07-12 18:46:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:34,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:34,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:34,721 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 18:46:34,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:34,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162826874] [2022-07-12 18:46:34,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162826874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:34,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:34,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:46:34,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404217445] [2022-07-12 18:46:34,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:34,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:46:34,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:34,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:46:34,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:46:34,723 INFO L87 Difference]: Start difference. First operand 301 states and 401 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:34,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:34,827 INFO L93 Difference]: Finished difference Result 516 states and 634 transitions. [2022-07-12 18:46:34,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:46:34,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-07-12 18:46:34,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:34,829 INFO L225 Difference]: With dead ends: 516 [2022-07-12 18:46:34,829 INFO L226 Difference]: Without dead ends: 516 [2022-07-12 18:46:34,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 18:46:34,830 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 442 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:34,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 407 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:34,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-07-12 18:46:34,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 303. [2022-07-12 18:46:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 238 states have (on average 1.6260504201680672) internal successors, (387), 290 states have internal predecessors, (387), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:46:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 403 transitions. [2022-07-12 18:46:34,836 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 403 transitions. Word has length 21 [2022-07-12 18:46:34,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:34,836 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 403 transitions. [2022-07-12 18:46:34,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:34,836 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 403 transitions. [2022-07-12 18:46:34,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 18:46:34,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:34,837 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 18:46:34,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 18:46:34,837 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:34,837 INFO L85 PathProgramCache]: Analyzing trace with hash -611574334, now seen corresponding path program 1 times [2022-07-12 18:46:34,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:34,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798984138] [2022-07-12 18:46:34,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:34,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:34,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:34,891 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 18:46:34,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:34,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798984138] [2022-07-12 18:46:34,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798984138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:34,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:34,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:46:34,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112674852] [2022-07-12 18:46:34,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:34,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:46:34,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:34,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:46:34,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:46:34,893 INFO L87 Difference]: Start difference. First operand 303 states and 403 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:34,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:34,945 INFO L93 Difference]: Finished difference Result 336 states and 405 transitions. [2022-07-12 18:46:34,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:46:34,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-07-12 18:46:34,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:34,947 INFO L225 Difference]: With dead ends: 336 [2022-07-12 18:46:34,947 INFO L226 Difference]: Without dead ends: 336 [2022-07-12 18:46:34,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:46:34,948 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 348 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:34,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1140 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:46:34,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-07-12 18:46:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 303. [2022-07-12 18:46:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 238 states have (on average 1.6176470588235294) internal successors, (385), 290 states have internal predecessors, (385), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:46:34,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 401 transitions. [2022-07-12 18:46:34,952 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 401 transitions. Word has length 21 [2022-07-12 18:46:34,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:34,953 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 401 transitions. [2022-07-12 18:46:34,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:34,953 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 401 transitions. [2022-07-12 18:46:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 18:46:34,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:34,953 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 18:46:34,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 18:46:34,954 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:34,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:34,954 INFO L85 PathProgramCache]: Analyzing trace with hash -611572412, now seen corresponding path program 1 times [2022-07-12 18:46:34,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:34,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355805351] [2022-07-12 18:46:34,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:34,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:35,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:35,010 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 18:46:35,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:35,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355805351] [2022-07-12 18:46:35,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355805351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:35,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:35,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:46:35,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719930191] [2022-07-12 18:46:35,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:35,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:46:35,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:35,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:46:35,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:46:35,012 INFO L87 Difference]: Start difference. First operand 303 states and 401 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:35,066 INFO L93 Difference]: Finished difference Result 326 states and 391 transitions. [2022-07-12 18:46:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:46:35,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-07-12 18:46:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:35,067 INFO L225 Difference]: With dead ends: 326 [2022-07-12 18:46:35,067 INFO L226 Difference]: Without dead ends: 326 [2022-07-12 18:46:35,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:46:35,068 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 337 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:35,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 1130 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:46:35,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-12 18:46:35,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 293. [2022-07-12 18:46:35,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 230 states have (on average 1.6130434782608696) internal successors, (371), 280 states have internal predecessors, (371), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:46:35,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 387 transitions. [2022-07-12 18:46:35,073 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 387 transitions. Word has length 21 [2022-07-12 18:46:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:35,073 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 387 transitions. [2022-07-12 18:46:35,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 387 transitions. [2022-07-12 18:46:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 18:46:35,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:35,074 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] [2022-07-12 18:46:35,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 18:46:35,074 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:35,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:35,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1215813558, now seen corresponding path program 1 times [2022-07-12 18:46:35,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:35,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475229091] [2022-07-12 18:46:35,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:35,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:35,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:46:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:35,266 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 18:46:35,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:35,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475229091] [2022-07-12 18:46:35,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475229091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:35,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:35,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 18:46:35,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073901505] [2022-07-12 18:46:35,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:35,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:46:35,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:35,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:46:35,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:46:35,267 INFO L87 Difference]: Start difference. First operand 293 states and 387 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:35,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:35,734 INFO L93 Difference]: Finished difference Result 410 states and 523 transitions. [2022-07-12 18:46:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:46:35,735 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-07-12 18:46:35,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:35,736 INFO L225 Difference]: With dead ends: 410 [2022-07-12 18:46:35,736 INFO L226 Difference]: Without dead ends: 408 [2022-07-12 18:46:35,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:46:35,737 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 253 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:35,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 905 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:46:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-07-12 18:46:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 345. [2022-07-12 18:46:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 277 states have (on average 1.5884476534296028) internal successors, (440), 328 states have internal predecessors, (440), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-12 18:46:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 462 transitions. [2022-07-12 18:46:35,742 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 462 transitions. Word has length 23 [2022-07-12 18:46:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:35,743 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 462 transitions. [2022-07-12 18:46:35,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:35,743 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 462 transitions. [2022-07-12 18:46:35,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:46:35,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:35,743 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 18:46:35,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 18:46:35,744 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:35,744 INFO L85 PathProgramCache]: Analyzing trace with hash 173365089, now seen corresponding path program 1 times [2022-07-12 18:46:35,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:35,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335629857] [2022-07-12 18:46:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:35,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:35,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:46:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:35,771 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 18:46:35,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:35,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335629857] [2022-07-12 18:46:35,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335629857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:35,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:35,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:46:35,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776721975] [2022-07-12 18:46:35,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:35,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:46:35,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:35,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:46:35,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:46:35,773 INFO L87 Difference]: Start difference. First operand 345 states and 462 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:35,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:35,922 INFO L93 Difference]: Finished difference Result 520 states and 673 transitions. [2022-07-12 18:46:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:46:35,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-07-12 18:46:35,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:35,924 INFO L225 Difference]: With dead ends: 520 [2022-07-12 18:46:35,924 INFO L226 Difference]: Without dead ends: 520 [2022-07-12 18:46:35,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 18:46:35,924 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 236 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:35,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 372 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:35,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-07-12 18:46:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 377. [2022-07-12 18:46:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 309 states have (on average 1.6181229773462784) internal successors, (500), 360 states have internal predecessors, (500), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-12 18:46:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 522 transitions. [2022-07-12 18:46:35,931 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 522 transitions. Word has length 25 [2022-07-12 18:46:35,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:35,931 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 522 transitions. [2022-07-12 18:46:35,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:35,931 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 522 transitions. [2022-07-12 18:46:35,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:46:35,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:35,932 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 18:46:35,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 18:46:35,932 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:35,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:35,932 INFO L85 PathProgramCache]: Analyzing trace with hash 173365090, now seen corresponding path program 1 times [2022-07-12 18:46:35,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:35,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543709984] [2022-07-12 18:46:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:35,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:36,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:46:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:36,019 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 18:46:36,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:36,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543709984] [2022-07-12 18:46:36,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543709984] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:36,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:36,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:46:36,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151647009] [2022-07-12 18:46:36,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:36,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:46:36,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:36,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:46:36,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:46:36,021 INFO L87 Difference]: Start difference. First operand 377 states and 522 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:36,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:36,220 INFO L93 Difference]: Finished difference Result 428 states and 544 transitions. [2022-07-12 18:46:36,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:46:36,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-07-12 18:46:36,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:36,222 INFO L225 Difference]: With dead ends: 428 [2022-07-12 18:46:36,222 INFO L226 Difference]: Without dead ends: 428 [2022-07-12 18:46:36,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:46:36,223 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 267 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:36,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 564 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:46:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-07-12 18:46:36,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 377. [2022-07-12 18:46:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 309 states have (on average 1.5792880258899675) internal successors, (488), 360 states have internal predecessors, (488), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-12 18:46:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 510 transitions. [2022-07-12 18:46:36,228 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 510 transitions. Word has length 25 [2022-07-12 18:46:36,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:36,228 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 510 transitions. [2022-07-12 18:46:36,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:36,228 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 510 transitions. [2022-07-12 18:46:36,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:46:36,229 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:36,229 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 18:46:36,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 18:46:36,229 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:36,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash -560017875, now seen corresponding path program 1 times [2022-07-12 18:46:36,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:36,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865925989] [2022-07-12 18:46:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:36,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:36,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:36,331 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 18:46:36,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:36,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865925989] [2022-07-12 18:46:36,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865925989] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:36,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:36,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 18:46:36,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183993732] [2022-07-12 18:46:36,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:36,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:46:36,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:36,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:46:36,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:46:36,333 INFO L87 Difference]: Start difference. First operand 377 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:36,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:36,557 INFO L93 Difference]: Finished difference Result 667 states and 867 transitions. [2022-07-12 18:46:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:46:36,557 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-07-12 18:46:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:36,559 INFO L225 Difference]: With dead ends: 667 [2022-07-12 18:46:36,559 INFO L226 Difference]: Without dead ends: 667 [2022-07-12 18:46:36,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:46:36,560 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 391 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:36,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 1187 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:36,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-07-12 18:46:36,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 439. [2022-07-12 18:46:36,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 368 states have (on average 1.546195652173913) internal successors, (569), 419 states have internal predecessors, (569), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 18:46:36,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 595 transitions. [2022-07-12 18:46:36,567 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 595 transitions. Word has length 25 [2022-07-12 18:46:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:36,568 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 595 transitions. [2022-07-12 18:46:36,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:36,568 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 595 transitions. [2022-07-12 18:46:36,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:46:36,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:36,568 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, 1, 1] [2022-07-12 18:46:36,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 18:46:36,569 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:36,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:36,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1306109328, now seen corresponding path program 1 times [2022-07-12 18:46:36,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:36,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160430504] [2022-07-12 18:46:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:36,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:36,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:36,651 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 18:46:36,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:36,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160430504] [2022-07-12 18:46:36,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160430504] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:36,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:36,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:46:36,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387901706] [2022-07-12 18:46:36,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:36,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:46:36,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:36,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:46:36,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:46:36,653 INFO L87 Difference]: Start difference. First operand 439 states and 595 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:36,875 INFO L93 Difference]: Finished difference Result 552 states and 696 transitions. [2022-07-12 18:46:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:46:36,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-07-12 18:46:36,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:36,877 INFO L225 Difference]: With dead ends: 552 [2022-07-12 18:46:36,877 INFO L226 Difference]: Without dead ends: 552 [2022-07-12 18:46:36,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:46:36,878 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 991 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:36,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [991 Valid, 372 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:46:36,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-07-12 18:46:36,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 455. [2022-07-12 18:46:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 389 states have (on average 1.5295629820051413) internal successors, (595), 434 states have internal predecessors, (595), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-12 18:46:36,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 623 transitions. [2022-07-12 18:46:36,885 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 623 transitions. Word has length 27 [2022-07-12 18:46:36,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:36,885 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 623 transitions. [2022-07-12 18:46:36,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:36,885 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 623 transitions. [2022-07-12 18:46:36,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 18:46:36,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:36,885 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, 1, 1, 1] [2022-07-12 18:46:36,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-12 18:46:36,886 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:36,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:36,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1834683473, now seen corresponding path program 1 times [2022-07-12 18:46:36,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:36,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90451910] [2022-07-12 18:46:36,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:36,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:36,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:36,941 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 18:46:36,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:36,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90451910] [2022-07-12 18:46:36,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90451910] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:36,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:36,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:46:36,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008495671] [2022-07-12 18:46:36,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:36,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:46:36,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:36,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:46:36,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:46:36,942 INFO L87 Difference]: Start difference. First operand 455 states and 623 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:37,060 INFO L93 Difference]: Finished difference Result 480 states and 621 transitions. [2022-07-12 18:46:37,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:46:37,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-07-12 18:46:37,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:37,062 INFO L225 Difference]: With dead ends: 480 [2022-07-12 18:46:37,062 INFO L226 Difference]: Without dead ends: 480 [2022-07-12 18:46:37,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:46:37,062 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 420 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:37,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 871 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-07-12 18:46:37,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 453. [2022-07-12 18:46:37,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 389 states have (on average 1.519280205655527) internal successors, (591), 432 states have internal predecessors, (591), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-12 18:46:37,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 619 transitions. [2022-07-12 18:46:37,070 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 619 transitions. Word has length 28 [2022-07-12 18:46:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:37,070 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 619 transitions. [2022-07-12 18:46:37,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:37,070 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 619 transitions. [2022-07-12 18:46:37,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 18:46:37,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:37,070 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, 1, 1, 1, 1] [2022-07-12 18:46:37,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-12 18:46:37,071 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:37,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:37,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1486279512, now seen corresponding path program 1 times [2022-07-12 18:46:37,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:37,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414902857] [2022-07-12 18:46:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:37,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:37,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:46:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:37,113 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 18:46:37,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:37,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414902857] [2022-07-12 18:46:37,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414902857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:37,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:37,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:46:37,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465701000] [2022-07-12 18:46:37,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:37,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:46:37,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:37,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:46:37,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:46:37,115 INFO L87 Difference]: Start difference. First operand 453 states and 619 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:37,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:37,216 INFO L93 Difference]: Finished difference Result 518 states and 681 transitions. [2022-07-12 18:46:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:46:37,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-07-12 18:46:37,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:37,218 INFO L225 Difference]: With dead ends: 518 [2022-07-12 18:46:37,218 INFO L226 Difference]: Without dead ends: 518 [2022-07-12 18:46:37,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 18:46:37,218 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 168 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:37,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 560 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-07-12 18:46:37,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 453. [2022-07-12 18:46:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 389 states have (on average 1.5141388174807198) internal successors, (589), 432 states have internal predecessors, (589), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-12 18:46:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 617 transitions. [2022-07-12 18:46:37,226 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 617 transitions. Word has length 29 [2022-07-12 18:46:37,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:37,226 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 617 transitions. [2022-07-12 18:46:37,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:37,226 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 617 transitions. [2022-07-12 18:46:37,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:46:37,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:37,227 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, 1, 1, 1, 1, 1] [2022-07-12 18:46:37,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-12 18:46:37,227 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:37,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:37,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1169975593, now seen corresponding path program 1 times [2022-07-12 18:46:37,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:37,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418757506] [2022-07-12 18:46:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:37,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:37,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:46:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:37,301 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 18:46:37,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:37,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418757506] [2022-07-12 18:46:37,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418757506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:37,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:37,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:46:37,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900436987] [2022-07-12 18:46:37,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:37,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:46:37,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:46:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:46:37,302 INFO L87 Difference]: Start difference. First operand 453 states and 617 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:37,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:37,458 INFO L93 Difference]: Finished difference Result 565 states and 746 transitions. [2022-07-12 18:46:37,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:46:37,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-07-12 18:46:37,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:37,460 INFO L225 Difference]: With dead ends: 565 [2022-07-12 18:46:37,460 INFO L226 Difference]: Without dead ends: 565 [2022-07-12 18:46:37,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 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 18:46:37,460 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 161 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:37,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 513 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:37,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-07-12 18:46:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 493. [2022-07-12 18:46:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 426 states have (on average 1.5046948356807512) internal successors, (641), 470 states have internal predecessors, (641), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 18:46:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 673 transitions. [2022-07-12 18:46:37,468 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 673 transitions. Word has length 30 [2022-07-12 18:46:37,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:37,468 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 673 transitions. [2022-07-12 18:46:37,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:37,469 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 673 transitions. [2022-07-12 18:46:37,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:46:37,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:37,469 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, 1, 1, 1, 1, 1] [2022-07-12 18:46:37,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-12 18:46:37,469 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:37,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:37,470 INFO L85 PathProgramCache]: Analyzing trace with hash 2100742417, now seen corresponding path program 1 times [2022-07-12 18:46:37,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:37,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519795512] [2022-07-12 18:46:37,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:37,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:37,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:37,576 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 18:46:37,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:37,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519795512] [2022-07-12 18:46:37,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519795512] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:37,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:37,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 18:46:37,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677128656] [2022-07-12 18:46:37,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:37,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:46:37,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:37,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:46:37,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:46:37,578 INFO L87 Difference]: Start difference. First operand 493 states and 673 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:37,909 INFO L93 Difference]: Finished difference Result 585 states and 737 transitions. [2022-07-12 18:46:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:46:37,909 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-07-12 18:46:37,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:37,911 INFO L225 Difference]: With dead ends: 585 [2022-07-12 18:46:37,911 INFO L226 Difference]: Without dead ends: 585 [2022-07-12 18:46:37,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:46:37,912 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 779 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:37,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [781 Valid, 740 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:46:37,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-07-12 18:46:37,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 491. [2022-07-12 18:46:37,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 426 states have (on average 1.4953051643192488) internal successors, (637), 468 states have internal predecessors, (637), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 18:46:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 669 transitions. [2022-07-12 18:46:37,920 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 669 transitions. Word has length 30 [2022-07-12 18:46:37,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:37,920 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 669 transitions. [2022-07-12 18:46:37,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:37,920 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 669 transitions. [2022-07-12 18:46:37,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 18:46:37,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:37,921 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:37,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-12 18:46:37,921 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:37,921 INFO L85 PathProgramCache]: Analyzing trace with hash -252550768, now seen corresponding path program 1 times [2022-07-12 18:46:37,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:37,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291864474] [2022-07-12 18:46:37,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:37,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:37,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:46:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:37,955 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 18:46:37,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:37,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291864474] [2022-07-12 18:46:37,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291864474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:37,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:37,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:46:37,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42999184] [2022-07-12 18:46:37,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:37,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:46:37,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:37,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:46:37,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:46:37,957 INFO L87 Difference]: Start difference. First operand 491 states and 669 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:37,977 INFO L93 Difference]: Finished difference Result 581 states and 776 transitions. [2022-07-12 18:46:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:46:37,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-07-12 18:46:37,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:37,979 INFO L225 Difference]: With dead ends: 581 [2022-07-12 18:46:37,980 INFO L226 Difference]: Without dead ends: 581 [2022-07-12 18:46:37,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:46:37,980 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 196 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:37,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 630 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:46:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-07-12 18:46:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 491. [2022-07-12 18:46:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 426 states have (on average 1.4859154929577465) internal successors, (633), 468 states have internal predecessors, (633), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 18:46:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 665 transitions. [2022-07-12 18:46:37,987 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 665 transitions. Word has length 32 [2022-07-12 18:46:37,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:37,988 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 665 transitions. [2022-07-12 18:46:37,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 665 transitions. [2022-07-12 18:46:37,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 18:46:37,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:37,989 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:37,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-12 18:46:37,989 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:37,989 INFO L85 PathProgramCache]: Analyzing trace with hash -252548846, now seen corresponding path program 1 times [2022-07-12 18:46:37,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:37,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157494495] [2022-07-12 18:46:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:37,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:38,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:46:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:38,049 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 18:46:38,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:38,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157494495] [2022-07-12 18:46:38,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157494495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:38,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:38,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:46:38,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148508965] [2022-07-12 18:46:38,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:38,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:46:38,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:38,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:46:38,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:46:38,050 INFO L87 Difference]: Start difference. First operand 491 states and 665 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:38,196 INFO L93 Difference]: Finished difference Result 750 states and 983 transitions. [2022-07-12 18:46:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:46:38,196 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-07-12 18:46:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:38,198 INFO L225 Difference]: With dead ends: 750 [2022-07-12 18:46:38,198 INFO L226 Difference]: Without dead ends: 750 [2022-07-12 18:46:38,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:46:38,199 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 464 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:38,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 1000 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-07-12 18:46:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 488. [2022-07-12 18:46:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 426 states have (on average 1.4530516431924883) internal successors, (619), 465 states have internal predecessors, (619), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 18:46:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 651 transitions. [2022-07-12 18:46:38,207 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 651 transitions. Word has length 32 [2022-07-12 18:46:38,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:38,207 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 651 transitions. [2022-07-12 18:46:38,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:38,208 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 651 transitions. [2022-07-12 18:46:38,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 18:46:38,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:38,208 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:38,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-12 18:46:38,208 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:38,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:38,209 INFO L85 PathProgramCache]: Analyzing trace with hash -934879925, now seen corresponding path program 1 times [2022-07-12 18:46:38,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:38,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067063436] [2022-07-12 18:46:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:38,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:38,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:46:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:38,281 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 18:46:38,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:38,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067063436] [2022-07-12 18:46:38,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067063436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:38,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:38,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:46:38,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718245883] [2022-07-12 18:46:38,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:38,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:46:38,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:38,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:46:38,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:46:38,283 INFO L87 Difference]: Start difference. First operand 488 states and 651 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:38,604 INFO L93 Difference]: Finished difference Result 925 states and 1213 transitions. [2022-07-12 18:46:38,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:46:38,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-07-12 18:46:38,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:38,607 INFO L225 Difference]: With dead ends: 925 [2022-07-12 18:46:38,607 INFO L226 Difference]: Without dead ends: 925 [2022-07-12 18:46:38,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:46:38,607 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 351 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:38,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 834 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:46:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-07-12 18:46:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 557. [2022-07-12 18:46:38,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 489 states have (on average 1.4355828220858895) internal successors, (702), 530 states have internal predecessors, (702), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (20), 16 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-12 18:46:38,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 742 transitions. [2022-07-12 18:46:38,616 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 742 transitions. Word has length 32 [2022-07-12 18:46:38,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:38,616 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 742 transitions. [2022-07-12 18:46:38,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:38,617 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 742 transitions. [2022-07-12 18:46:38,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:46:38,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:38,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:38,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-12 18:46:38,617 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:38,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:38,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1427861429, now seen corresponding path program 1 times [2022-07-12 18:46:38,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:38,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156924543] [2022-07-12 18:46:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:38,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:38,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-12 18:46:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:38,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:38,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156924543] [2022-07-12 18:46:38,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156924543] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:46:38,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825744004] [2022-07-12 18:46:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:38,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:46:38,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:46:38,643 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 18:46:38,648 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 18:46:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:38,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 18:46:38,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:46:38,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:38,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825744004] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:38,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:46:38,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-12 18:46:38,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828621461] [2022-07-12 18:46:38,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:38,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:46:38,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:38,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:46:38,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:46:38,726 INFO L87 Difference]: Start difference. First operand 557 states and 742 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:38,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:38,731 INFO L93 Difference]: Finished difference Result 566 states and 750 transitions. [2022-07-12 18:46:38,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:46:38,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-07-12 18:46:38,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:38,733 INFO L225 Difference]: With dead ends: 566 [2022-07-12 18:46:38,733 INFO L226 Difference]: Without dead ends: 565 [2022-07-12 18:46:38,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:46:38,734 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 0 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:38,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 281 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:46:38,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-07-12 18:46:38,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 561. [2022-07-12 18:46:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 493 states have (on average 1.4300202839756593) internal successors, (705), 534 states have internal predecessors, (705), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (20), 16 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-12 18:46:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 745 transitions. [2022-07-12 18:46:38,742 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 745 transitions. Word has length 33 [2022-07-12 18:46:38,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:38,742 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 745 transitions. [2022-07-12 18:46:38,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:38,742 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 745 transitions. [2022-07-12 18:46:38,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:46:38,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:38,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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 18:46:38,798 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 18:46:38,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:46:38,959 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:38,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2049457417, now seen corresponding path program 1 times [2022-07-12 18:46:38,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:38,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041720291] [2022-07-12 18:46:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:38,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:39,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-12 18:46:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:46:39,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:39,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041720291] [2022-07-12 18:46:39,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041720291] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:39,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:39,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-12 18:46:39,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601383490] [2022-07-12 18:46:39,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:39,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:46:39,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:39,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:46:39,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:46:39,225 INFO L87 Difference]: Start difference. First operand 561 states and 745 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:39,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:39,700 INFO L93 Difference]: Finished difference Result 596 states and 770 transitions. [2022-07-12 18:46:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:46:39,701 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-07-12 18:46:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:39,702 INFO L225 Difference]: With dead ends: 596 [2022-07-12 18:46:39,702 INFO L226 Difference]: Without dead ends: 594 [2022-07-12 18:46:39,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:46:39,703 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 279 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:39,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1017 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:46:39,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-07-12 18:46:39,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 518. [2022-07-12 18:46:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 453 states have (on average 1.4216335540838851) internal successors, (644), 493 states have internal predecessors, (644), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 18:46:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 680 transitions. [2022-07-12 18:46:39,710 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 680 transitions. Word has length 33 [2022-07-12 18:46:39,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:39,710 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 680 transitions. [2022-07-12 18:46:39,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 680 transitions. [2022-07-12 18:46:39,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:46:39,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:39,711 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:39,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-12 18:46:39,711 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:39,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:39,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1083493612, now seen corresponding path program 1 times [2022-07-12 18:46:39,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:39,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697063517] [2022-07-12 18:46:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:39,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:39,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:46:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:39,833 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 18:46:39,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:39,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697063517] [2022-07-12 18:46:39,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697063517] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:39,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:39,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:46:39,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892009939] [2022-07-12 18:46:39,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:39,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:46:39,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:39,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:46:39,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:46:39,835 INFO L87 Difference]: Start difference. First operand 518 states and 680 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:40,202 INFO L93 Difference]: Finished difference Result 668 states and 826 transitions. [2022-07-12 18:46:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:46:40,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-07-12 18:46:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:40,204 INFO L225 Difference]: With dead ends: 668 [2022-07-12 18:46:40,204 INFO L226 Difference]: Without dead ends: 668 [2022-07-12 18:46:40,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:46:40,204 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 410 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:40,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 673 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:46:40,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-07-12 18:46:40,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 518. [2022-07-12 18:46:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 453 states have (on average 1.4105960264900663) internal successors, (639), 493 states have internal predecessors, (639), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 18:46:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 675 transitions. [2022-07-12 18:46:40,212 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 675 transitions. Word has length 33 [2022-07-12 18:46:40,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:40,212 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 675 transitions. [2022-07-12 18:46:40,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:40,212 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 675 transitions. [2022-07-12 18:46:40,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-12 18:46:40,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:40,213 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:40,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-12 18:46:40,213 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:40,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:40,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2113699762, now seen corresponding path program 1 times [2022-07-12 18:46:40,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:40,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130926828] [2022-07-12 18:46:40,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:40,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:40,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:46:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:40,366 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 18:46:40,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:40,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130926828] [2022-07-12 18:46:40,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130926828] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:40,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:40,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:46:40,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592590057] [2022-07-12 18:46:40,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:40,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:46:40,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:40,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:46:40,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:46:40,368 INFO L87 Difference]: Start difference. First operand 518 states and 675 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:40,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:40,526 INFO L93 Difference]: Finished difference Result 556 states and 716 transitions. [2022-07-12 18:46:40,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:46:40,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-07-12 18:46:40,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:40,528 INFO L225 Difference]: With dead ends: 556 [2022-07-12 18:46:40,528 INFO L226 Difference]: Without dead ends: 556 [2022-07-12 18:46:40,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:46:40,528 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 99 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:40,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 680 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-07-12 18:46:40,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 518. [2022-07-12 18:46:40,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 453 states have (on average 1.4061810154525387) internal successors, (637), 493 states have internal predecessors, (637), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 18:46:40,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 673 transitions. [2022-07-12 18:46:40,534 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 673 transitions. Word has length 34 [2022-07-12 18:46:40,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:40,534 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 673 transitions. [2022-07-12 18:46:40,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:40,535 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 673 transitions. [2022-07-12 18:46:40,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 18:46:40,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:40,536 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:40,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-12 18:46:40,536 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:40,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:40,536 INFO L85 PathProgramCache]: Analyzing trace with hash 949188435, now seen corresponding path program 1 times [2022-07-12 18:46:40,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:40,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841139078] [2022-07-12 18:46:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:40,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:40,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:40,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-12 18:46:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 18:46:40,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:40,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841139078] [2022-07-12 18:46:40,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841139078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:40,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:40,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:46:40,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426268830] [2022-07-12 18:46:40,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:40,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:46:40,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:40,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:46:40,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:46:40,568 INFO L87 Difference]: Start difference. First operand 518 states and 673 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:46:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:40,574 INFO L93 Difference]: Finished difference Result 520 states and 675 transitions. [2022-07-12 18:46:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:46:40,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-07-12 18:46:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:40,576 INFO L225 Difference]: With dead ends: 520 [2022-07-12 18:46:40,576 INFO L226 Difference]: Without dead ends: 520 [2022-07-12 18:46:40,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 18:46:40,576 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 0 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:40,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 282 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:46:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-07-12 18:46:40,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2022-07-12 18:46:40,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 455 states have (on average 1.4043956043956043) internal successors, (639), 495 states have internal predecessors, (639), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 18:46:40,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 675 transitions. [2022-07-12 18:46:40,584 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 675 transitions. Word has length 41 [2022-07-12 18:46:40,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:40,584 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 675 transitions. [2022-07-12 18:46:40,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:46:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 675 transitions. [2022-07-12 18:46:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 18:46:40,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:40,585 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:40,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-12 18:46:40,585 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:40,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:40,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1758535061, now seen corresponding path program 1 times [2022-07-12 18:46:40,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:40,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054303924] [2022-07-12 18:46:40,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:40,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:40,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:40,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-12 18:46:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:46:40,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:40,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054303924] [2022-07-12 18:46:40,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054303924] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:46:40,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744930996] [2022-07-12 18:46:40,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:40,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:46:40,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:46:40,864 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 18:46:40,890 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 18:46:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:40,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 18:46:40,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:41,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:46:41,364 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:46:41,365 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 30 treesize of output 34 [2022-07-12 18:46:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:46:41,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744930996] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:46:41,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:46:41,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 8] total 27 [2022-07-12 18:46:41,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552219248] [2022-07-12 18:46:41,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:46:41,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 18:46:41,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:41,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 18:46:41,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:46:41,548 INFO L87 Difference]: Start difference. First operand 520 states and 675 transitions. Second operand has 28 states, 27 states have (on average 4.037037037037037) internal successors, (109), 24 states have internal predecessors, (109), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:46:41,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:41,879 INFO L93 Difference]: Finished difference Result 545 states and 676 transitions. [2022-07-12 18:46:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:46:41,884 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.037037037037037) internal successors, (109), 24 states have internal predecessors, (109), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2022-07-12 18:46:41,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:41,890 INFO L225 Difference]: With dead ends: 545 [2022-07-12 18:46:41,890 INFO L226 Difference]: Without dead ends: 545 [2022-07-12 18:46:41,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:46:41,891 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 1697 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1699 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:41,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1699 Valid, 1449 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:46:41,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-07-12 18:46:41,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 517. [2022-07-12 18:46:41,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 453 states have (on average 1.3995584988962473) internal successors, (634), 493 states have internal predecessors, (634), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 14 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 18:46:41,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 670 transitions. [2022-07-12 18:46:41,900 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 670 transitions. Word has length 41 [2022-07-12 18:46:41,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:41,900 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 670 transitions. [2022-07-12 18:46:41,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.037037037037037) internal successors, (109), 24 states have internal predecessors, (109), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:46:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 670 transitions. [2022-07-12 18:46:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:46:41,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:41,901 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:41,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:46:42,118 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,SelfDestructingSolverStorable34 [2022-07-12 18:46:42,119 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:42,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:42,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1516271307, now seen corresponding path program 1 times [2022-07-12 18:46:42,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:42,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431824866] [2022-07-12 18:46:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:42,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:42,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:42,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 18:46:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:46:42,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:42,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431824866] [2022-07-12 18:46:42,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431824866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:46:42,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086039812] [2022-07-12 18:46:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:42,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:46:42,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:46:42,178 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 18:46:42,179 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 18:46:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:42,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:46:42,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:42,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:46:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:46:42,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086039812] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:46:42,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:46:42,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-12 18:46:42,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763202286] [2022-07-12 18:46:42,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:46:42,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:46:42,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:42,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:46:42,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:46:42,353 INFO L87 Difference]: Start difference. First operand 517 states and 670 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:46:42,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:42,403 INFO L93 Difference]: Finished difference Result 1213 states and 1554 transitions. [2022-07-12 18:46:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:46:42,403 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2022-07-12 18:46:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:42,406 INFO L225 Difference]: With dead ends: 1213 [2022-07-12 18:46:42,406 INFO L226 Difference]: Without dead ends: 1213 [2022-07-12 18:46:42,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:46:42,407 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 649 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:42,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 755 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:46:42,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-07-12 18:46:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 679. [2022-07-12 18:46:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 609 states have (on average 1.361247947454844) internal successors, (829), 649 states have internal predecessors, (829), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (24), 20 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-12 18:46:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 877 transitions. [2022-07-12 18:46:42,418 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 877 transitions. Word has length 44 [2022-07-12 18:46:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:42,418 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 877 transitions. [2022-07-12 18:46:42,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-12 18:46:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 877 transitions. [2022-07-12 18:46:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:46:42,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:42,419 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:42,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 18:46:42,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:46:42,639 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:42,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:42,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2077631411, now seen corresponding path program 1 times [2022-07-12 18:46:42,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:42,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026348456] [2022-07-12 18:46:42,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:42,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:42,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:42,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-12 18:46:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:46:42,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:42,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026348456] [2022-07-12 18:46:42,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026348456] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:46:42,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707446715] [2022-07-12 18:46:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:42,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:46:42,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:46:42,766 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 18:46:42,808 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 18:46:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:42,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 18:46:42,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:43,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:43,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707446715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:43,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:46:43,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2022-07-12 18:46:43,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041978714] [2022-07-12 18:46:43,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:43,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:46:43,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:43,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:46:43,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:46:43,055 INFO L87 Difference]: Start difference. First operand 679 states and 877 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:46:43,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:43,217 INFO L93 Difference]: Finished difference Result 873 states and 1085 transitions. [2022-07-12 18:46:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:46:43,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-07-12 18:46:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:43,220 INFO L225 Difference]: With dead ends: 873 [2022-07-12 18:46:43,220 INFO L226 Difference]: Without dead ends: 873 [2022-07-12 18:46:43,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:46:43,221 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 517 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:43,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 371 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:43,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-07-12 18:46:43,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 676. [2022-07-12 18:46:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 609 states have (on average 1.348111658456486) internal successors, (821), 646 states have internal predecessors, (821), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (24), 20 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-12 18:46:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 869 transitions. [2022-07-12 18:46:43,230 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 869 transitions. Word has length 44 [2022-07-12 18:46:43,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:43,230 INFO L495 AbstractCegarLoop]: Abstraction has 676 states and 869 transitions. [2022-07-12 18:46:43,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:46:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 869 transitions. [2022-07-12 18:46:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 18:46:43,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:43,231 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:43,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 18:46:43,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-12 18:46:43,449 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:43,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:43,449 INFO L85 PathProgramCache]: Analyzing trace with hash 990140495, now seen corresponding path program 1 times [2022-07-12 18:46:43,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:43,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961631474] [2022-07-12 18:46:43,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:43,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:43,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:46:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:43,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-12 18:46:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:46:43,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:43,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961631474] [2022-07-12 18:46:43,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961631474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:46:43,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567135588] [2022-07-12 18:46:43,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:43,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:46:43,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:46:43,497 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 18:46:43,531 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 18:46:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:43,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:46:43,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:43,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:46:43,728 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:46:43,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-12 18:46:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:46:43,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567135588] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:46:43,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:46:43,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-12 18:46:43,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362907944] [2022-07-12 18:46:43,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:46:43,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:46:43,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:43,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:46:43,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:46:43,748 INFO L87 Difference]: Start difference. First operand 676 states and 869 transitions. Second operand has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:46:44,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:44,211 INFO L93 Difference]: Finished difference Result 2164 states and 2713 transitions. [2022-07-12 18:46:44,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:46:44,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2022-07-12 18:46:44,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:44,217 INFO L225 Difference]: With dead ends: 2164 [2022-07-12 18:46:44,218 INFO L226 Difference]: Without dead ends: 2164 [2022-07-12 18:46:44,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:46:44,218 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 2244 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2246 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:44,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2246 Valid, 825 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:46:44,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2022-07-12 18:46:44,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 831. [2022-07-12 18:46:44,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 758 states have (on average 1.3007915567282322) internal successors, (986), 791 states have internal predecessors, (986), 33 states have call successors, (33), 12 states have call predecessors, (33), 12 states have return successors, (33), 27 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-12 18:46:44,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1052 transitions. [2022-07-12 18:46:44,235 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1052 transitions. Word has length 46 [2022-07-12 18:46:44,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:44,236 INFO L495 AbstractCegarLoop]: Abstraction has 831 states and 1052 transitions. [2022-07-12 18:46:44,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:46:44,236 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1052 transitions. [2022-07-12 18:46:44,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 18:46:44,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:44,237 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:44,269 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 18:46:44,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-12 18:46:44,454 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:44,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:44,455 INFO L85 PathProgramCache]: Analyzing trace with hash -201066803, now seen corresponding path program 1 times [2022-07-12 18:46:44,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:44,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281591569] [2022-07-12 18:46:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:44,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:44,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:46:44,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:44,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281591569] [2022-07-12 18:46:44,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281591569] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:46:44,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335116156] [2022-07-12 18:46:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:44,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:46:44,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:46:44,500 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 18:46:44,501 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 18:46:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:44,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:46:44,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:46:44,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:46:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:46:44,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335116156] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:46:44,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:46:44,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 7 [2022-07-12 18:46:44,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982585845] [2022-07-12 18:46:44,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:46:44,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:46:44,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:44,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:46:44,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:46:44,666 INFO L87 Difference]: Start difference. First operand 831 states and 1052 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:46:44,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:44,712 INFO L93 Difference]: Finished difference Result 2728 states and 3437 transitions. [2022-07-12 18:46:44,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:46:44,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-07-12 18:46:44,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:44,718 INFO L225 Difference]: With dead ends: 2728 [2022-07-12 18:46:44,719 INFO L226 Difference]: Without dead ends: 2728 [2022-07-12 18:46:44,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:46:44,720 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 534 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:44,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 636 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:46:44,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2022-07-12 18:46:44,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1906. [2022-07-12 18:46:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1774 states have (on average 1.2953776775648254) internal successors, (2298), 1811 states have internal predecessors, (2298), 74 states have call successors, (74), 30 states have call predecessors, (74), 30 states have return successors, (74), 64 states have call predecessors, (74), 74 states have call successors, (74) [2022-07-12 18:46:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2446 transitions. [2022-07-12 18:46:44,752 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2446 transitions. Word has length 45 [2022-07-12 18:46:44,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:44,752 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 2446 transitions. [2022-07-12 18:46:44,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:46:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2446 transitions. [2022-07-12 18:46:44,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 18:46:44,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:44,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:44,785 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 18:46:44,965 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,SelfDestructingSolverStorable38 [2022-07-12 18:46:44,965 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:44,965 INFO L85 PathProgramCache]: Analyzing trace with hash -202913845, now seen corresponding path program 1 times [2022-07-12 18:46:44,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:44,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203870728] [2022-07-12 18:46:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:44,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:45,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:45,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:45,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203870728] [2022-07-12 18:46:45,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203870728] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:46:45,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542181252] [2022-07-12 18:46:45,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:45,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:46:45,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:46:45,186 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 18:46:45,197 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 18:46:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:45,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:46:45,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:45,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:45,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542181252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:45,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:46:45,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2022-07-12 18:46:45,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709832997] [2022-07-12 18:46:45,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:45,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:46:45,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:45,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:46:45,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:46:45,493 INFO L87 Difference]: Start difference. First operand 1906 states and 2446 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:45,612 INFO L93 Difference]: Finished difference Result 1954 states and 2477 transitions. [2022-07-12 18:46:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:46:45,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-07-12 18:46:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:45,617 INFO L225 Difference]: With dead ends: 1954 [2022-07-12 18:46:45,617 INFO L226 Difference]: Without dead ends: 1954 [2022-07-12 18:46:45,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:46:45,618 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 395 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:45,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 439 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2022-07-12 18:46:45,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1908. [2022-07-12 18:46:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1776 states have (on average 1.2956081081081081) internal successors, (2301), 1813 states have internal predecessors, (2301), 74 states have call successors, (74), 30 states have call predecessors, (74), 30 states have return successors, (74), 64 states have call predecessors, (74), 74 states have call successors, (74) [2022-07-12 18:46:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2449 transitions. [2022-07-12 18:46:45,671 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2449 transitions. Word has length 45 [2022-07-12 18:46:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:45,672 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2449 transitions. [2022-07-12 18:46:45,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2449 transitions. [2022-07-12 18:46:45,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 18:46:45,674 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:45,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:45,697 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 18:46:45,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:46:45,875 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:45,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:45,875 INFO L85 PathProgramCache]: Analyzing trace with hash -202913783, now seen corresponding path program 1 times [2022-07-12 18:46:45,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:45,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775924117] [2022-07-12 18:46:45,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:45,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:45,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:45,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:45,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775924117] [2022-07-12 18:46:45,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775924117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:46:45,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526335898] [2022-07-12 18:46:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:45,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:46:45,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:46:46,000 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 18:46:46,029 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 18:46:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:46,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:46:46,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:46,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:46,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526335898] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:46,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:46:46,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2022-07-12 18:46:46,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729747634] [2022-07-12 18:46:46,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:46,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:46:46,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:46,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:46:46,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:46:46,284 INFO L87 Difference]: Start difference. First operand 1908 states and 2449 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:46,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:46,402 INFO L93 Difference]: Finished difference Result 1953 states and 2475 transitions. [2022-07-12 18:46:46,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:46:46,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-07-12 18:46:46,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:46,416 INFO L225 Difference]: With dead ends: 1953 [2022-07-12 18:46:46,420 INFO L226 Difference]: Without dead ends: 1953 [2022-07-12 18:46:46,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:46:46,421 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 284 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:46,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 460 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2022-07-12 18:46:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1905. [2022-07-12 18:46:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1774 states have (on average 1.294250281848929) internal successors, (2296), 1810 states have internal predecessors, (2296), 74 states have call successors, (74), 30 states have call predecessors, (74), 30 states have return successors, (74), 64 states have call predecessors, (74), 74 states have call successors, (74) [2022-07-12 18:46:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 2444 transitions. [2022-07-12 18:46:46,448 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 2444 transitions. Word has length 45 [2022-07-12 18:46:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:46,448 INFO L495 AbstractCegarLoop]: Abstraction has 1905 states and 2444 transitions. [2022-07-12 18:46:46,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:46,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 2444 transitions. [2022-07-12 18:46:46,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 18:46:46,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:46,452 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:46,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-12 18:46:46,667 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,SelfDestructingSolverStorable40 [2022-07-12 18:46:46,667 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:46,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1987177000, now seen corresponding path program 1 times [2022-07-12 18:46:46,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:46,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830907981] [2022-07-12 18:46:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:46,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:46,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:46,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:46,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830907981] [2022-07-12 18:46:46,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830907981] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:46,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:46,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-12 18:46:46,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561000160] [2022-07-12 18:46:46,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:46,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:46:46,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:46,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:46:46,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:46:46,940 INFO L87 Difference]: Start difference. First operand 1905 states and 2444 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:47,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:47,489 INFO L93 Difference]: Finished difference Result 2115 states and 2684 transitions. [2022-07-12 18:46:47,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:46:47,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-07-12 18:46:47,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:47,493 INFO L225 Difference]: With dead ends: 2115 [2022-07-12 18:46:47,493 INFO L226 Difference]: Without dead ends: 2115 [2022-07-12 18:46:47,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:46:47,493 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 1130 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:47,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1132 Valid, 1128 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:46:47,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2022-07-12 18:46:47,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1965. [2022-07-12 18:46:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1827 states have (on average 1.2939244663382594) internal successors, (2364), 1864 states have internal predecessors, (2364), 78 states have call successors, (78), 34 states have call predecessors, (78), 34 states have return successors, (78), 66 states have call predecessors, (78), 78 states have call successors, (78) [2022-07-12 18:46:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2520 transitions. [2022-07-12 18:46:47,514 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2520 transitions. Word has length 48 [2022-07-12 18:46:47,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:47,514 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2520 transitions. [2022-07-12 18:46:47,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2520 transitions. [2022-07-12 18:46:47,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 18:46:47,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:47,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:47,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-12 18:46:47,516 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1987176999, now seen corresponding path program 1 times [2022-07-12 18:46:47,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:47,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597474527] [2022-07-12 18:46:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:47,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:47,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:47,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:47,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597474527] [2022-07-12 18:46:47,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597474527] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:47,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:47,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-12 18:46:47,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659250427] [2022-07-12 18:46:47,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:47,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:46:47,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:47,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:46:47,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:46:47,930 INFO L87 Difference]: Start difference. First operand 1965 states and 2520 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:48,692 INFO L93 Difference]: Finished difference Result 2303 states and 2927 transitions. [2022-07-12 18:46:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 18:46:48,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-07-12 18:46:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:48,695 INFO L225 Difference]: With dead ends: 2303 [2022-07-12 18:46:48,695 INFO L226 Difference]: Without dead ends: 2303 [2022-07-12 18:46:48,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:46:48,696 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 1560 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:48,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1560 Valid, 1037 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:46:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2022-07-12 18:46:48,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2169. [2022-07-12 18:46:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2015 states have (on average 1.3076923076923077) internal successors, (2635), 2056 states have internal predecessors, (2635), 88 states have call successors, (88), 40 states have call predecessors, (88), 40 states have return successors, (88), 72 states have call predecessors, (88), 88 states have call successors, (88) [2022-07-12 18:46:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 2811 transitions. [2022-07-12 18:46:48,717 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 2811 transitions. Word has length 48 [2022-07-12 18:46:48,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:48,717 INFO L495 AbstractCegarLoop]: Abstraction has 2169 states and 2811 transitions. [2022-07-12 18:46:48,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 2811 transitions. [2022-07-12 18:46:48,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 18:46:48,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:48,718 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:48,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-12 18:46:48,719 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:48,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:48,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1985329958, now seen corresponding path program 1 times [2022-07-12 18:46:48,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:48,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251549912] [2022-07-12 18:46:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:48,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:49,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:49,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:49,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251549912] [2022-07-12 18:46:49,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251549912] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:49,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:49,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-12 18:46:49,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802243563] [2022-07-12 18:46:49,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:49,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:46:49,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:49,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:46:49,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:46:49,360 INFO L87 Difference]: Start difference. First operand 2169 states and 2811 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:50,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:50,010 INFO L93 Difference]: Finished difference Result 2215 states and 2859 transitions. [2022-07-12 18:46:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:46:50,010 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-07-12 18:46:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:50,019 INFO L225 Difference]: With dead ends: 2215 [2022-07-12 18:46:50,020 INFO L226 Difference]: Without dead ends: 2215 [2022-07-12 18:46:50,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:46:50,020 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 102 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:50,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 855 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:46:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2022-07-12 18:46:50,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2201. [2022-07-12 18:46:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2047 states have (on average 1.3043478260869565) internal successors, (2670), 2088 states have internal predecessors, (2670), 88 states have call successors, (88), 40 states have call predecessors, (88), 40 states have return successors, (88), 72 states have call predecessors, (88), 88 states have call successors, (88) [2022-07-12 18:46:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 2846 transitions. [2022-07-12 18:46:50,057 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 2846 transitions. Word has length 48 [2022-07-12 18:46:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:50,057 INFO L495 AbstractCegarLoop]: Abstraction has 2201 states and 2846 transitions. [2022-07-12 18:46:50,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 2846 transitions. [2022-07-12 18:46:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 18:46:50,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:50,058 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:50,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-12 18:46:50,058 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:50,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:50,059 INFO L85 PathProgramCache]: Analyzing trace with hash -894968564, now seen corresponding path program 1 times [2022-07-12 18:46:50,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:50,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236707039] [2022-07-12 18:46:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:50,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:50,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:50,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:50,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236707039] [2022-07-12 18:46:50,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236707039] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:50,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:50,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-12 18:46:50,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286125587] [2022-07-12 18:46:50,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:50,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:46:50,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:50,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:46:50,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:46:50,209 INFO L87 Difference]: Start difference. First operand 2201 states and 2846 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:50,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:50,545 INFO L93 Difference]: Finished difference Result 2921 states and 3720 transitions. [2022-07-12 18:46:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:46:50,545 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-07-12 18:46:50,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:50,549 INFO L225 Difference]: With dead ends: 2921 [2022-07-12 18:46:50,549 INFO L226 Difference]: Without dead ends: 2921 [2022-07-12 18:46:50,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:46:50,550 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 984 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:50,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [986 Valid, 1318 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:46:50,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2022-07-12 18:46:50,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2503. [2022-07-12 18:46:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2311 states have (on average 1.3033318909562959) internal successors, (3012), 2376 states have internal predecessors, (3012), 119 states have call successors, (119), 47 states have call predecessors, (119), 47 states have return successors, (119), 79 states have call predecessors, (119), 119 states have call successors, (119) [2022-07-12 18:46:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 3250 transitions. [2022-07-12 18:46:50,599 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 3250 transitions. Word has length 49 [2022-07-12 18:46:50,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:50,599 INFO L495 AbstractCegarLoop]: Abstraction has 2503 states and 3250 transitions. [2022-07-12 18:46:50,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 3250 transitions. [2022-07-12 18:46:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 18:46:50,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:50,600 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:50,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-12 18:46:50,600 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:50,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:50,600 INFO L85 PathProgramCache]: Analyzing trace with hash -894968563, now seen corresponding path program 1 times [2022-07-12 18:46:50,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:50,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910338175] [2022-07-12 18:46:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:50,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:50,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:50,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:50,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910338175] [2022-07-12 18:46:50,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910338175] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:50,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:50,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-12 18:46:50,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970960613] [2022-07-12 18:46:50,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:50,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:46:50,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:50,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:46:50,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:46:50,872 INFO L87 Difference]: Start difference. First operand 2503 states and 3250 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:51,226 INFO L93 Difference]: Finished difference Result 3034 states and 3868 transitions. [2022-07-12 18:46:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:46:51,226 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-07-12 18:46:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:51,230 INFO L225 Difference]: With dead ends: 3034 [2022-07-12 18:46:51,230 INFO L226 Difference]: Without dead ends: 3034 [2022-07-12 18:46:51,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:46:51,233 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 1071 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:51,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1071 Valid, 874 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:46:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2022-07-12 18:46:51,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 2696. [2022-07-12 18:46:51,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2488 states have (on average 1.3135048231511255) internal successors, (3268), 2557 states have internal predecessors, (3268), 129 states have call successors, (129), 53 states have call predecessors, (129), 53 states have return successors, (129), 85 states have call predecessors, (129), 129 states have call successors, (129) [2022-07-12 18:46:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 3526 transitions. [2022-07-12 18:46:51,283 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 3526 transitions. Word has length 49 [2022-07-12 18:46:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:51,284 INFO L495 AbstractCegarLoop]: Abstraction has 2696 states and 3526 transitions. [2022-07-12 18:46:51,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:51,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 3526 transitions. [2022-07-12 18:46:51,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 18:46:51,284 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:51,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:51,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-12 18:46:51,285 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:51,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:51,285 INFO L85 PathProgramCache]: Analyzing trace with hash -2031481280, now seen corresponding path program 1 times [2022-07-12 18:46:51,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:51,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175869897] [2022-07-12 18:46:51,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:51,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:51,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:51,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:51,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175869897] [2022-07-12 18:46:51,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175869897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:46:51,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702028569] [2022-07-12 18:46:51,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:51,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:46:51,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:46:51,344 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 18:46:51,375 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 18:46:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:51,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:46:51,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:51,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:51,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702028569] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:51,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:46:51,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-07-12 18:46:51,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078878028] [2022-07-12 18:46:51,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:51,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:46:51,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:51,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:46:51,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:46:51,519 INFO L87 Difference]: Start difference. First operand 2696 states and 3526 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:51,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:51,537 INFO L93 Difference]: Finished difference Result 3305 states and 4345 transitions. [2022-07-12 18:46:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:46:51,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-07-12 18:46:51,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:51,542 INFO L225 Difference]: With dead ends: 3305 [2022-07-12 18:46:51,542 INFO L226 Difference]: Without dead ends: 3305 [2022-07-12 18:46:51,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 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 18:46:51,543 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 213 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:51,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 337 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:46:51,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3305 states. [2022-07-12 18:46:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3305 to 3181. [2022-07-12 18:46:51,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3181 states, 2959 states have (on average 1.3264616424467726) internal successors, (3925), 3028 states have internal predecessors, (3925), 143 states have call successors, (143), 53 states have call predecessors, (143), 53 states have return successors, (143), 99 states have call predecessors, (143), 143 states have call successors, (143) [2022-07-12 18:46:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3181 states to 3181 states and 4211 transitions. [2022-07-12 18:46:51,576 INFO L78 Accepts]: Start accepts. Automaton has 3181 states and 4211 transitions. Word has length 50 [2022-07-12 18:46:51,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:51,577 INFO L495 AbstractCegarLoop]: Abstraction has 3181 states and 4211 transitions. [2022-07-12 18:46:51,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:51,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3181 states and 4211 transitions. [2022-07-12 18:46:51,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 18:46:51,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:51,578 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:51,609 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 18:46:51,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-12 18:46:51,794 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:51,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:51,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1111433432, now seen corresponding path program 1 times [2022-07-12 18:46:51,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:51,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416864430] [2022-07-12 18:46:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:51,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:52,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:52,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-12 18:46:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:46:52,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:52,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416864430] [2022-07-12 18:46:52,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416864430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:52,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:52,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-12 18:46:52,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593094221] [2022-07-12 18:46:52,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:52,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 18:46:52,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:52,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 18:46:52,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:46:52,262 INFO L87 Difference]: Start difference. First operand 3181 states and 4211 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:46:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:53,397 INFO L93 Difference]: Finished difference Result 3476 states and 4504 transitions. [2022-07-12 18:46:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 18:46:53,397 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-07-12 18:46:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:53,402 INFO L225 Difference]: With dead ends: 3476 [2022-07-12 18:46:53,402 INFO L226 Difference]: Without dead ends: 3474 [2022-07-12 18:46:53,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 18:46:53,402 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 1261 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 2126 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:53,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1261 Valid, 2126 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:46:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3474 states. [2022-07-12 18:46:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3474 to 3142. [2022-07-12 18:46:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 2923 states have (on average 1.3243243243243243) internal successors, (3871), 2991 states have internal predecessors, (3871), 141 states have call successors, (141), 52 states have call predecessors, (141), 52 states have return successors, (141), 98 states have call predecessors, (141), 141 states have call successors, (141) [2022-07-12 18:46:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4153 transitions. [2022-07-12 18:46:53,431 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4153 transitions. Word has length 51 [2022-07-12 18:46:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:53,431 INFO L495 AbstractCegarLoop]: Abstraction has 3142 states and 4153 transitions. [2022-07-12 18:46:53,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:46:53,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4153 transitions. [2022-07-12 18:46:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 18:46:53,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:53,432 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:53,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-12 18:46:53,433 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:53,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:53,433 INFO L85 PathProgramCache]: Analyzing trace with hash -38812235, now seen corresponding path program 1 times [2022-07-12 18:46:53,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:53,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979633068] [2022-07-12 18:46:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:53,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:53,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:46:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:53,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:53,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979633068] [2022-07-12 18:46:53,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979633068] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:53,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:53,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:46:53,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068545612] [2022-07-12 18:46:53,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:53,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:46:53,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:53,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:46:53,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:46:53,459 INFO L87 Difference]: Start difference. First operand 3142 states and 4153 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:53,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:53,474 INFO L93 Difference]: Finished difference Result 3700 states and 4965 transitions. [2022-07-12 18:46:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:46:53,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-07-12 18:46:53,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:53,480 INFO L225 Difference]: With dead ends: 3700 [2022-07-12 18:46:53,480 INFO L226 Difference]: Without dead ends: 3700 [2022-07-12 18:46:53,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 18:46:53,480 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 122 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:53,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 461 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:46:53,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3700 states. [2022-07-12 18:46:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3700 to 2749. [2022-07-12 18:46:53,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2554 states have (on average 1.308535630383712) internal successors, (3342), 2618 states have internal predecessors, (3342), 126 states have call successors, (126), 43 states have call predecessors, (126), 43 states have return successors, (126), 87 states have call predecessors, (126), 126 states have call successors, (126) [2022-07-12 18:46:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 3594 transitions. [2022-07-12 18:46:53,509 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 3594 transitions. Word has length 51 [2022-07-12 18:46:53,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:53,509 INFO L495 AbstractCegarLoop]: Abstraction has 2749 states and 3594 transitions. [2022-07-12 18:46:53,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:53,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 3594 transitions. [2022-07-12 18:46:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 18:46:53,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:53,510 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:53,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-12 18:46:53,510 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:53,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash -86585480, now seen corresponding path program 1 times [2022-07-12 18:46:53,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:53,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461127071] [2022-07-12 18:46:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:53,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:53,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:46:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:53,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:53,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461127071] [2022-07-12 18:46:53,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461127071] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:46:53,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578744077] [2022-07-12 18:46:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:53,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:46:53,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:46:53,572 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 18:46:53,607 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 18:46:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:53,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 18:46:53,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:53,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:46:53,853 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 17 treesize of output 7 [2022-07-12 18:46:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:46:53,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:46:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:46:54,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578744077] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:46:54,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:46:54,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 15 [2022-07-12 18:46:54,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960137433] [2022-07-12 18:46:54,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:46:54,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:46:54,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:54,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:46:54,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:46:54,005 INFO L87 Difference]: Start difference. First operand 2749 states and 3594 transitions. Second operand has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:46:54,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:54,602 INFO L93 Difference]: Finished difference Result 3759 states and 4929 transitions. [2022-07-12 18:46:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:46:54,603 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2022-07-12 18:46:54,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:54,608 INFO L225 Difference]: With dead ends: 3759 [2022-07-12 18:46:54,608 INFO L226 Difference]: Without dead ends: 3751 [2022-07-12 18:46:54,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:46:54,609 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 631 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:54,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 1717 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:46:54,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2022-07-12 18:46:54,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 2761. [2022-07-12 18:46:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2566 states have (on average 1.3059236165237724) internal successors, (3351), 2630 states have internal predecessors, (3351), 126 states have call successors, (126), 43 states have call predecessors, (126), 43 states have return successors, (126), 87 states have call predecessors, (126), 126 states have call successors, (126) [2022-07-12 18:46:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 3603 transitions. [2022-07-12 18:46:54,637 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 3603 transitions. Word has length 52 [2022-07-12 18:46:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:54,637 INFO L495 AbstractCegarLoop]: Abstraction has 2761 states and 3603 transitions. [2022-07-12 18:46:54,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:46:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 3603 transitions. [2022-07-12 18:46:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 18:46:54,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:54,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:54,657 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 18:46:54,857 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,SelfDestructingSolverStorable49 [2022-07-12 18:46:54,857 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:54,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:54,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1958066468, now seen corresponding path program 1 times [2022-07-12 18:46:54,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:54,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222717721] [2022-07-12 18:46:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:54,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:55,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:55,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:55,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222717721] [2022-07-12 18:46:55,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222717721] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:55,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:55,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-12 18:46:55,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654639521] [2022-07-12 18:46:55,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:55,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:46:55,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:55,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:46:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:46:55,235 INFO L87 Difference]: Start difference. First operand 2761 states and 3603 transitions. Second operand has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 16 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:56,229 INFO L93 Difference]: Finished difference Result 2946 states and 3803 transitions. [2022-07-12 18:46:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 18:46:56,236 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 16 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-07-12 18:46:56,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:56,241 INFO L225 Difference]: With dead ends: 2946 [2022-07-12 18:46:56,241 INFO L226 Difference]: Without dead ends: 2946 [2022-07-12 18:46:56,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:46:56,242 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 1251 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:56,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 1246 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:46:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2022-07-12 18:46:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 2775. [2022-07-12 18:46:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2580 states have (on average 1.3058139534883721) internal successors, (3369), 2644 states have internal predecessors, (3369), 126 states have call successors, (126), 43 states have call predecessors, (126), 43 states have return successors, (126), 87 states have call predecessors, (126), 126 states have call successors, (126) [2022-07-12 18:46:56,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 3621 transitions. [2022-07-12 18:46:56,269 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 3621 transitions. Word has length 52 [2022-07-12 18:46:56,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:56,269 INFO L495 AbstractCegarLoop]: Abstraction has 2775 states and 3621 transitions. [2022-07-12 18:46:56,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 16 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:56,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 3621 transitions. [2022-07-12 18:46:56,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 18:46:56,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:56,271 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:56,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-12 18:46:56,271 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:56,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:56,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1148719842, now seen corresponding path program 1 times [2022-07-12 18:46:56,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:56,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485068144] [2022-07-12 18:46:56,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:56,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:56,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:56,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:56,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485068144] [2022-07-12 18:46:56,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485068144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:56,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:46:56,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-12 18:46:56,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421682219] [2022-07-12 18:46:56,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:56,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:46:56,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:56,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:46:56,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:46:56,435 INFO L87 Difference]: Start difference. First operand 2775 states and 3621 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:56,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:56,814 INFO L93 Difference]: Finished difference Result 3193 states and 4105 transitions. [2022-07-12 18:46:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:46:56,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-07-12 18:46:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:56,840 INFO L225 Difference]: With dead ends: 3193 [2022-07-12 18:46:56,840 INFO L226 Difference]: Without dead ends: 3193 [2022-07-12 18:46:56,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:46:56,842 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 1129 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:56,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 856 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:46:56,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2022-07-12 18:46:56,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 2762. [2022-07-12 18:46:56,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2762 states, 2567 states have (on average 1.3058044409816907) internal successors, (3352), 2631 states have internal predecessors, (3352), 126 states have call successors, (126), 43 states have call predecessors, (126), 43 states have return successors, (126), 87 states have call predecessors, (126), 126 states have call successors, (126) [2022-07-12 18:46:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 3604 transitions. [2022-07-12 18:46:56,874 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 3604 transitions. Word has length 52 [2022-07-12 18:46:56,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:56,874 INFO L495 AbstractCegarLoop]: Abstraction has 2762 states and 3604 transitions. [2022-07-12 18:46:56,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:46:56,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 3604 transitions. [2022-07-12 18:46:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 18:46:56,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:56,875 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:46:56,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-12 18:46:56,875 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:56,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1366968916, now seen corresponding path program 1 times [2022-07-12 18:46:56,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:56,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369304897] [2022-07-12 18:46:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:56,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:56,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:57,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-12 18:46:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:46:57,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:57,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369304897] [2022-07-12 18:46:57,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369304897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:46:57,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887983348] [2022-07-12 18:46:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:57,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:46:57,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:46:57,020 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 18:46:57,021 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 18:46:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:57,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:46:57,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:57,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:46:57,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887983348] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:46:57,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:46:57,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2022-07-12 18:46:57,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254809574] [2022-07-12 18:46:57,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:46:57,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:46:57,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:57,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:46:57,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:46:57,369 INFO L87 Difference]: Start difference. First operand 2762 states and 3604 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:46:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:46:57,673 INFO L93 Difference]: Finished difference Result 3180 states and 4095 transitions. [2022-07-12 18:46:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:46:57,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-07-12 18:46:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:46:57,679 INFO L225 Difference]: With dead ends: 3180 [2022-07-12 18:46:57,679 INFO L226 Difference]: Without dead ends: 3180 [2022-07-12 18:46:57,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:46:57,680 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 469 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:46:57,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 524 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:46:57,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2022-07-12 18:46:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 2760. [2022-07-12 18:46:57,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2760 states, 2567 states have (on average 1.2987923646279704) internal successors, (3334), 2629 states have internal predecessors, (3334), 126 states have call successors, (126), 43 states have call predecessors, (126), 43 states have return successors, (126), 87 states have call predecessors, (126), 126 states have call successors, (126) [2022-07-12 18:46:57,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2760 states to 2760 states and 3586 transitions. [2022-07-12 18:46:57,704 INFO L78 Accepts]: Start accepts. Automaton has 2760 states and 3586 transitions. Word has length 53 [2022-07-12 18:46:57,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:46:57,705 INFO L495 AbstractCegarLoop]: Abstraction has 2760 states and 3586 transitions. [2022-07-12 18:46:57,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:46:57,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2760 states and 3586 transitions. [2022-07-12 18:46:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 18:46:57,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:46:57,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2022-07-12 18:46:57,724 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 18:46:57,924 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,SelfDestructingSolverStorable52 [2022-07-12 18:46:57,924 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:46:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:46:57,925 INFO L85 PathProgramCache]: Analyzing trace with hash 633585951, now seen corresponding path program 1 times [2022-07-12 18:46:57,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:46:57,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251253033] [2022-07-12 18:46:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:57,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:46:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:58,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:46:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:58,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 18:46:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:46:58,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:46:58,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251253033] [2022-07-12 18:46:58,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251253033] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:46:58,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690000919] [2022-07-12 18:46:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:46:58,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:46:58,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:46:58,308 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 18:46:58,311 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 18:46:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:46:58,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-12 18:46:58,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:46:58,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:46:58,836 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 15 treesize of output 11 [2022-07-12 18:46:58,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:46:58,902 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 29 treesize of output 28 [2022-07-12 18:46:59,033 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 21 treesize of output 9 [2022-07-12 18:46:59,046 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:46:59,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 18:46:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:46:59,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:46:59,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690000919] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:46:59,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:46:59,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2022-07-12 18:46:59,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791037852] [2022-07-12 18:46:59,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:46:59,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 18:46:59,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:46:59,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 18:46:59,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 18:46:59,172 INFO L87 Difference]: Start difference. First operand 2760 states and 3586 transitions. Second operand has 32 states, 31 states have (on average 3.0) internal successors, (93), 29 states have internal predecessors, (93), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:47:00,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:00,666 INFO L93 Difference]: Finished difference Result 3760 states and 4886 transitions. [2022-07-12 18:47:00,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 18:47:00,667 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.0) internal successors, (93), 29 states have internal predecessors, (93), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 53 [2022-07-12 18:47:00,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:00,670 INFO L225 Difference]: With dead ends: 3760 [2022-07-12 18:47:00,670 INFO L226 Difference]: Without dead ends: 3760 [2022-07-12 18:47:00,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=801, Invalid=2739, Unknown=0, NotChecked=0, Total=3540 [2022-07-12 18:47:00,671 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 2001 mSDsluCounter, 2464 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2003 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:00,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2003 Valid, 2670 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 18:47:00,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2022-07-12 18:47:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 2786. [2022-07-12 18:47:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2786 states, 2593 states have (on average 1.2892402622445045) internal successors, (3343), 2653 states have internal predecessors, (3343), 126 states have call successors, (126), 43 states have call predecessors, (126), 43 states have return successors, (126), 89 states have call predecessors, (126), 126 states have call successors, (126) [2022-07-12 18:47:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 3595 transitions. [2022-07-12 18:47:00,696 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 3595 transitions. Word has length 53 [2022-07-12 18:47:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:00,696 INFO L495 AbstractCegarLoop]: Abstraction has 2786 states and 3595 transitions. [2022-07-12 18:47:00,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.0) internal successors, (93), 29 states have internal predecessors, (93), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:47:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 3595 transitions. [2022-07-12 18:47:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 18:47:00,697 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:00,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2022-07-12 18:47:00,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-12 18:47:00,930 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,SelfDestructingSolverStorable53 [2022-07-12 18:47:00,930 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:47:00,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:00,930 INFO L85 PathProgramCache]: Analyzing trace with hash 633585952, now seen corresponding path program 1 times [2022-07-12 18:47:00,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:00,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455164556] [2022-07-12 18:47:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:00,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:01,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:47:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:01,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 18:47:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:47:01,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:01,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455164556] [2022-07-12 18:47:01,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455164556] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:01,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966118363] [2022-07-12 18:47:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:01,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:01,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:01,384 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 18:47:01,393 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 18:47:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:01,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-12 18:47:01,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:01,680 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 18:47:01,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-12 18:47:01,690 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 6 treesize of output 5 [2022-07-12 18:47:01,799 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 18:47:01,816 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 18:47:01,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:47:01,835 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 18:47:01,845 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 18:47:01,852 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 18:47:01,997 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-12 18:47:01,997 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 1 case distinctions, treesize of input 23 treesize of output 30 [2022-07-12 18:47:02,005 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-12 18:47:02,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 18:47:02,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:02,237 INFO L356 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2022-07-12 18:47:02,238 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 2 case distinctions, treesize of input 101 treesize of output 83 [2022-07-12 18:47:02,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:02,250 INFO L356 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2022-07-12 18:47:02,251 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 2 case distinctions, treesize of input 105 treesize of output 115 [2022-07-12 18:47:02,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:02,716 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 60 treesize of output 38 [2022-07-12 18:47:02,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:02,736 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 17 treesize of output 7 [2022-07-12 18:47:02,790 INFO L356 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-07-12 18:47:02,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 54 [2022-07-12 18:47:02,817 INFO L356 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2022-07-12 18:47:02,817 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 64 treesize of output 92 [2022-07-12 18:47:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:03,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:47:13,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966118363] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:13,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:47:13,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 32 [2022-07-12 18:47:13,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357678502] [2022-07-12 18:47:13,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:47:13,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 18:47:13,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:13,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 18:47:13,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 18:47:13,646 INFO L87 Difference]: Start difference. First operand 2786 states and 3595 transitions. Second operand has 33 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:47:16,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:16,429 INFO L93 Difference]: Finished difference Result 5558 states and 7177 transitions. [2022-07-12 18:47:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-12 18:47:16,429 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 53 [2022-07-12 18:47:16,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:16,438 INFO L225 Difference]: With dead ends: 5558 [2022-07-12 18:47:16,438 INFO L226 Difference]: Without dead ends: 5558 [2022-07-12 18:47:16,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=868, Invalid=5774, Unknown=0, NotChecked=0, Total=6642 [2022-07-12 18:47:16,439 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 821 mSDsluCounter, 3957 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 4190 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1350 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:16,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 4190 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1350 Invalid, 0 Unknown, 1350 Unchecked, 0.6s Time] [2022-07-12 18:47:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5558 states. [2022-07-12 18:47:16,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5558 to 4844. [2022-07-12 18:47:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4844 states, 4533 states have (on average 1.2863445841606) internal successors, (5831), 4622 states have internal predecessors, (5831), 225 states have call successors, (225), 62 states have call predecessors, (225), 62 states have return successors, (225), 159 states have call predecessors, (225), 225 states have call successors, (225) [2022-07-12 18:47:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4844 states to 4844 states and 6281 transitions. [2022-07-12 18:47:16,500 INFO L78 Accepts]: Start accepts. Automaton has 4844 states and 6281 transitions. Word has length 53 [2022-07-12 18:47:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:16,500 INFO L495 AbstractCegarLoop]: Abstraction has 4844 states and 6281 transitions. [2022-07-12 18:47:16,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.0625) internal successors, (98), 31 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:47:16,501 INFO L276 IsEmpty]: Start isEmpty. Operand 4844 states and 6281 transitions. [2022-07-12 18:47:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 18:47:16,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:16,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:16,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:47:16,716 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,SelfDestructingSolverStorable54 [2022-07-12 18:47:16,717 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:47:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:16,718 INFO L85 PathProgramCache]: Analyzing trace with hash 385346035, now seen corresponding path program 1 times [2022-07-12 18:47:16,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:16,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725070064] [2022-07-12 18:47:16,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:16,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:16,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 18:47:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:16,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-12 18:47:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:47:16,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:16,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725070064] [2022-07-12 18:47:16,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725070064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:16,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887284347] [2022-07-12 18:47:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:16,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:16,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:16,819 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 18:47:16,859 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 18:47:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:16,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 18:47:16,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:17,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:17,028 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 17 treesize of output 7 [2022-07-12 18:47:17,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:17,031 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 17 treesize of output 7 [2022-07-12 18:47:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:47:17,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:47:17,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887284347] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:17,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:47:17,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-07-12 18:47:17,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762060053] [2022-07-12 18:47:17,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:17,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:47:17,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:17,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:47:17,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:47:17,066 INFO L87 Difference]: Start difference. First operand 4844 states and 6281 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:47:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:17,314 INFO L93 Difference]: Finished difference Result 4941 states and 6369 transitions. [2022-07-12 18:47:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:47:17,314 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-07-12 18:47:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:17,319 INFO L225 Difference]: With dead ends: 4941 [2022-07-12 18:47:17,319 INFO L226 Difference]: Without dead ends: 4941 [2022-07-12 18:47:17,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:47:17,320 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 220 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:17,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1101 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:47:17,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4941 states. [2022-07-12 18:47:17,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4941 to 4277. [2022-07-12 18:47:17,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4277 states, 4006 states have (on average 1.2825761357963055) internal successors, (5138), 4085 states have internal predecessors, (5138), 200 states have call successors, (200), 47 states have call predecessors, (200), 47 states have return successors, (200), 144 states have call predecessors, (200), 200 states have call successors, (200) [2022-07-12 18:47:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4277 states to 4277 states and 5538 transitions. [2022-07-12 18:47:17,356 INFO L78 Accepts]: Start accepts. Automaton has 4277 states and 5538 transitions. Word has length 54 [2022-07-12 18:47:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:17,356 INFO L495 AbstractCegarLoop]: Abstraction has 4277 states and 5538 transitions. [2022-07-12 18:47:17,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:47:17,356 INFO L276 IsEmpty]: Start isEmpty. Operand 4277 states and 5538 transitions. [2022-07-12 18:47:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 18:47:17,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:17,357 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2022-07-12 18:47:17,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:47:17,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:17,574 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:47:17,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:17,574 INFO L85 PathProgramCache]: Analyzing trace with hash -885676746, now seen corresponding path program 1 times [2022-07-12 18:47:17,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:17,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739270245] [2022-07-12 18:47:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:17,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:17,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:47:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:17,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 18:47:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:47:17,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:17,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739270245] [2022-07-12 18:47:17,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739270245] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:47:17,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:47:17,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 18:47:17,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475896106] [2022-07-12 18:47:17,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:47:17,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:47:17,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:17,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:47:17,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:47:17,783 INFO L87 Difference]: Start difference. First operand 4277 states and 5538 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:47:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:17,962 INFO L93 Difference]: Finished difference Result 4170 states and 5374 transitions. [2022-07-12 18:47:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:47:17,962 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-07-12 18:47:17,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:17,967 INFO L225 Difference]: With dead ends: 4170 [2022-07-12 18:47:17,967 INFO L226 Difference]: Without dead ends: 4170 [2022-07-12 18:47:17,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:47:17,967 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 861 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:17,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 521 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:47:17,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2022-07-12 18:47:17,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4021. [2022-07-12 18:47:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4021 states, 3762 states have (on average 1.2737905369484317) internal successors, (4792), 3837 states have internal predecessors, (4792), 190 states have call successors, (190), 45 states have call predecessors, (190), 45 states have return successors, (190), 138 states have call predecessors, (190), 190 states have call successors, (190) [2022-07-12 18:47:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4021 states to 4021 states and 5172 transitions. [2022-07-12 18:47:18,005 INFO L78 Accepts]: Start accepts. Automaton has 4021 states and 5172 transitions. Word has length 54 [2022-07-12 18:47:18,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:18,006 INFO L495 AbstractCegarLoop]: Abstraction has 4021 states and 5172 transitions. [2022-07-12 18:47:18,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:47:18,006 INFO L276 IsEmpty]: Start isEmpty. Operand 4021 states and 5172 transitions. [2022-07-12 18:47:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 18:47:18,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:18,006 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:47:18,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-12 18:47:18,006 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:47:18,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:18,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1487364529, now seen corresponding path program 1 times [2022-07-12 18:47:18,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:18,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170983067] [2022-07-12 18:47:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:18,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:18,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:47:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:18,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:18,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170983067] [2022-07-12 18:47:18,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170983067] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:18,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24183742] [2022-07-12 18:47:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:18,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:18,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:18,036 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 18:47:18,037 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 18:47:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:18,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:47:18,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:18,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:47:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:18,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24183742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:47:18,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:47:18,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-07-12 18:47:18,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102901248] [2022-07-12 18:47:18,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:47:18,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:47:18,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:47:18,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:47:18,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:47:18,231 INFO L87 Difference]: Start difference. First operand 4021 states and 5172 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:47:18,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:47:18,264 INFO L93 Difference]: Finished difference Result 7844 states and 10183 transitions. [2022-07-12 18:47:18,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:47:18,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-07-12 18:47:18,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:47:18,273 INFO L225 Difference]: With dead ends: 7844 [2022-07-12 18:47:18,273 INFO L226 Difference]: Without dead ends: 7844 [2022-07-12 18:47:18,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:47:18,273 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 352 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:47:18,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 547 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:47:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7844 states. [2022-07-12 18:47:18,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7844 to 6171. [2022-07-12 18:47:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6171 states, 5818 states have (on average 1.289274664833276) internal successors, (7501), 5903 states have internal predecessors, (7501), 284 states have call successors, (284), 45 states have call predecessors, (284), 45 states have return successors, (284), 222 states have call predecessors, (284), 284 states have call successors, (284) [2022-07-12 18:47:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6171 states to 6171 states and 8069 transitions. [2022-07-12 18:47:18,336 INFO L78 Accepts]: Start accepts. Automaton has 6171 states and 8069 transitions. Word has length 55 [2022-07-12 18:47:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:47:18,336 INFO L495 AbstractCegarLoop]: Abstraction has 6171 states and 8069 transitions. [2022-07-12 18:47:18,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:47:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 6171 states and 8069 transitions. [2022-07-12 18:47:18,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 18:47:18,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:47:18,336 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:47:18,355 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 18:47:18,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:18,556 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:47:18,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:47:18,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1136338587, now seen corresponding path program 1 times [2022-07-12 18:47:18,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:47:18,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136455269] [2022-07-12 18:47:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:18,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:47:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:18,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:47:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:18,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:47:18,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136455269] [2022-07-12 18:47:18,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136455269] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:47:18,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222947331] [2022-07-12 18:47:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:47:18,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:47:18,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:47:18,986 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 18:47:18,987 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 18:47:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:47:19,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-12 18:47:19,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:47:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:19,351 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 18:47:19,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:19,368 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 18:47:19,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:19,377 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 18:47:19,543 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-12 18:47:19,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-07-12 18:47:19,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:19,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:19,855 INFO L356 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2022-07-12 18:47:19,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 83 [2022-07-12 18:47:19,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:47:19,859 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 98 treesize of output 97 [2022-07-12 18:47:20,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:47:20,228 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 47 [2022-07-12 18:47:20,232 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 56 treesize of output 44 [2022-07-12 18:47:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:47:20,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:47:20,713 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:47:20,714 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 74 treesize of output 77 [2022-07-12 18:47:35,094 WARN L233 SmtUtils]: Spent 14.25s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:47:49,082 WARN L233 SmtUtils]: Spent 11.90s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:48:06,343 WARN L233 SmtUtils]: Spent 15.10s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:48:22,822 WARN L233 SmtUtils]: Spent 11.50s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:48:30,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222947331] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:30,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:48:30,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 33 [2022-07-12 18:48:30,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233148252] [2022-07-12 18:48:30,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:30,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 18:48:30,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:30,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 18:48:30,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2073, Unknown=11, NotChecked=0, Total=2256 [2022-07-12 18:48:30,727 INFO L87 Difference]: Start difference. First operand 6171 states and 8069 transitions. Second operand has 34 states, 33 states have (on average 3.272727272727273) internal successors, (108), 32 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:48:32,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:32,039 INFO L93 Difference]: Finished difference Result 6725 states and 8765 transitions. [2022-07-12 18:48:32,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 18:48:32,040 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.272727272727273) internal successors, (108), 32 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-07-12 18:48:32,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:32,047 INFO L225 Difference]: With dead ends: 6725 [2022-07-12 18:48:32,047 INFO L226 Difference]: Without dead ends: 6714 [2022-07-12 18:48:32,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 71.5s TimeCoverageRelationStatistics Valid=416, Invalid=4129, Unknown=11, NotChecked=0, Total=4556 [2022-07-12 18:48:32,048 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 398 mSDsluCounter, 2454 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2572 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 681 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:32,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 2572 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 750 Invalid, 0 Unknown, 681 Unchecked, 0.3s Time] [2022-07-12 18:48:32,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6714 states. [2022-07-12 18:48:32,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6714 to 6490. [2022-07-12 18:48:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6490 states, 6116 states have (on average 1.2930019620667104) internal successors, (7908), 6204 states have internal predecessors, (7908), 295 states have call successors, (295), 55 states have call predecessors, (295), 55 states have return successors, (295), 230 states have call predecessors, (295), 295 states have call successors, (295) [2022-07-12 18:48:32,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6490 states to 6490 states and 8498 transitions. [2022-07-12 18:48:32,116 INFO L78 Accepts]: Start accepts. Automaton has 6490 states and 8498 transitions. Word has length 56 [2022-07-12 18:48:32,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:32,117 INFO L495 AbstractCegarLoop]: Abstraction has 6490 states and 8498 transitions. [2022-07-12 18:48:32,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.272727272727273) internal successors, (108), 32 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:48:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 6490 states and 8498 transitions. [2022-07-12 18:48:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 18:48:32,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:32,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:48:32,135 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 18:48:32,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-12 18:48:32,331 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:48:32,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:32,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1394504025, now seen corresponding path program 1 times [2022-07-12 18:48:32,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:32,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176705507] [2022-07-12 18:48:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:32,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:32,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:48:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:32,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:32,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176705507] [2022-07-12 18:48:32,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176705507] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:32,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417024532] [2022-07-12 18:48:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:32,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:32,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:32,525 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 18:48:32,527 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 18:48:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:32,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 18:48:32,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:33,004 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 15 treesize of output 11 [2022-07-12 18:48:33,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:48:33,262 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 39 treesize of output 15 [2022-07-12 18:48:33,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 18:48:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:33,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:33,340 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 62 treesize of output 54 [2022-07-12 18:48:59,471 WARN L233 SmtUtils]: Spent 26.09s on a formula simplification. DAG size of input: 35 DAG size of output: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:49:05,575 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:49:28,123 WARN L233 SmtUtils]: Spent 10.15s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:49:34,243 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:49:34,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417024532] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:34,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:49:34,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-12 18:49:34,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344528623] [2022-07-12 18:49:34,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:34,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 18:49:34,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:49:34,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 18:49:34,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 18:49:34,260 INFO L87 Difference]: Start difference. First operand 6490 states and 8498 transitions. Second operand has 25 states, 24 states have (on average 4.25) internal successors, (102), 25 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:49:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:34,642 INFO L93 Difference]: Finished difference Result 6561 states and 8578 transitions. [2022-07-12 18:49:34,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:49:34,642 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.25) internal successors, (102), 25 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-07-12 18:49:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:34,649 INFO L225 Difference]: With dead ends: 6561 [2022-07-12 18:49:34,649 INFO L226 Difference]: Without dead ends: 6547 [2022-07-12 18:49:34,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 61.1s TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 18:49:34,649 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 123 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:34,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 1792 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 400 Invalid, 0 Unknown, 342 Unchecked, 0.2s Time] [2022-07-12 18:49:34,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6547 states. [2022-07-12 18:49:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6547 to 6484. [2022-07-12 18:49:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6484 states, 6110 states have (on average 1.2927986906710311) internal successors, (7899), 6198 states have internal predecessors, (7899), 295 states have call successors, (295), 55 states have call predecessors, (295), 55 states have return successors, (295), 230 states have call predecessors, (295), 295 states have call successors, (295) [2022-07-12 18:49:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6484 states to 6484 states and 8489 transitions. [2022-07-12 18:49:34,729 INFO L78 Accepts]: Start accepts. Automaton has 6484 states and 8489 transitions. Word has length 56 [2022-07-12 18:49:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:34,729 INFO L495 AbstractCegarLoop]: Abstraction has 6484 states and 8489 transitions. [2022-07-12 18:49:34,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.25) internal successors, (102), 25 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:49:34,729 INFO L276 IsEmpty]: Start isEmpty. Operand 6484 states and 8489 transitions. [2022-07-12 18:49:34,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-12 18:49:34,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:34,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:49:34,748 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 18:49:34,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-12 18:49:34,949 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:49:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:34,950 INFO L85 PathProgramCache]: Analyzing trace with hash 471291546, now seen corresponding path program 1 times [2022-07-12 18:49:34,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:34,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603454421] [2022-07-12 18:49:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:34,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:35,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:49:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:35,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-12 18:49:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:49:35,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:35,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603454421] [2022-07-12 18:49:35,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603454421] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:49:35,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:49:35,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 18:49:35,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897909187] [2022-07-12 18:49:35,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:49:35,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:49:35,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:49:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:49:35,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:49:35,135 INFO L87 Difference]: Start difference. First operand 6484 states and 8489 transitions. Second operand has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:49:35,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:35,708 INFO L93 Difference]: Finished difference Result 7606 states and 9884 transitions. [2022-07-12 18:49:35,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:49:35,719 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2022-07-12 18:49:35,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:35,726 INFO L225 Difference]: With dead ends: 7606 [2022-07-12 18:49:35,726 INFO L226 Difference]: Without dead ends: 7606 [2022-07-12 18:49:35,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=660, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:49:35,730 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 919 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:35,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 1217 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:49:35,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7606 states. [2022-07-12 18:49:35,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7606 to 6646. [2022-07-12 18:49:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6646 states, 6269 states have (on average 1.292710161110225) internal successors, (8104), 6358 states have internal predecessors, (8104), 297 states have call successors, (297), 56 states have call predecessors, (297), 56 states have return successors, (297), 231 states have call predecessors, (297), 297 states have call successors, (297) [2022-07-12 18:49:35,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6646 states to 6646 states and 8698 transitions. [2022-07-12 18:49:35,790 INFO L78 Accepts]: Start accepts. Automaton has 6646 states and 8698 transitions. Word has length 57 [2022-07-12 18:49:35,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:35,790 INFO L495 AbstractCegarLoop]: Abstraction has 6646 states and 8698 transitions. [2022-07-12 18:49:35,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:49:35,790 INFO L276 IsEmpty]: Start isEmpty. Operand 6646 states and 8698 transitions. [2022-07-12 18:49:35,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-12 18:49:35,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:35,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:49:35,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-07-12 18:49:35,794 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:49:35,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1725136247, now seen corresponding path program 1 times [2022-07-12 18:49:35,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:35,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910091736] [2022-07-12 18:49:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:35,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:36,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:49:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:36,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-12 18:49:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:49:36,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:36,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910091736] [2022-07-12 18:49:36,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910091736] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:36,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478563186] [2022-07-12 18:49:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:36,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:36,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:36,113 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 18:49:36,115 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 18:49:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:36,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-12 18:49:36,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:36,454 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:49:36,455 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 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 18:49:36,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:49:36,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:49:36,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:49:36,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:49:36,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:49:36,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:49:36,703 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-12 18:49:36,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-07-12 18:49:36,713 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-07-12 18:49:36,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-07-12 18:49:36,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:49:36,803 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 117 treesize of output 105 [2022-07-12 18:49:37,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:37,096 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 50 treesize of output 33 [2022-07-12 18:49:37,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:49:37,327 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 33 treesize of output 15 [2022-07-12 18:49:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:37,381 INFO L328 TraceCheckSpWp]: Computing backward predicates...