./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 a31fd051 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-?-a31fd05 [2023-02-15 13:02:32,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 13:02:32,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 13:02:32,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 13:02:32,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 13:02:32,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 13:02:33,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 13:02:33,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 13:02:33,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 13:02:33,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 13:02:33,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 13:02:33,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 13:02:33,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 13:02:33,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 13:02:33,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 13:02:33,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 13:02:33,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 13:02:33,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 13:02:33,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 13:02:33,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 13:02:33,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 13:02:33,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 13:02:33,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 13:02:33,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 13:02:33,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 13:02:33,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 13:02:33,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 13:02:33,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 13:02:33,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 13:02:33,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 13:02:33,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 13:02:33,038 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 13:02:33,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 13:02:33,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 13:02:33,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 13:02:33,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 13:02:33,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 13:02:33,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 13:02:33,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 13:02:33,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 13:02:33,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 13:02:33,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 13:02:33,062 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 13:02:33,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 13:02:33,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 13:02:33,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 13:02:33,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 13:02:33,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 13:02:33,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 13:02:33,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 13:02:33,068 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 13:02:33,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 13:02:33,069 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 13:02:33,069 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 13:02:33,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 13:02:33,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 13:02:33,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 13:02:33,070 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 13:02:33,070 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 13:02:33,070 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 13:02:33,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 13:02:33,070 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 13:02:33,070 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 13:02:33,071 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 13:02:33,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 13:02:33,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 13:02:33,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 13:02:33,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 13:02:33,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 13:02:33,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 13:02:33,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 13:02:33,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 13:02:33,072 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 13:02:33,073 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 13:02:33,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 13:02:33,073 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 13:02:33,073 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 [2023-02-15 13:02:33,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 13:02:33,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 13:02:33,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 13:02:33,261 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 13:02:33,261 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 13:02:33,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0214_1.i [2023-02-15 13:02:34,333 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 13:02:34,527 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 13:02:34,531 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2023-02-15 13:02:34,540 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/491d06132/9e1592373c094de5a3e880a93c29253c/FLAG853d4f6bb [2023-02-15 13:02:34,550 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/491d06132/9e1592373c094de5a3e880a93c29253c [2023-02-15 13:02:34,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 13:02:34,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 13:02:34,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 13:02:34,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 13:02:34,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 13:02:34,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:02:34" (1/1) ... [2023-02-15 13:02:34,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a6ca987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:02:34, skipping insertion in model container [2023-02-15 13:02:34,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:02:34" (1/1) ... [2023-02-15 13:02:34,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 13:02:34,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 13:02:34,782 WARN L623 FunctionHandler]: Unknown extern function abort [2023-02-15 13:02:34,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 13:02:34,821 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 13:02:34,850 WARN L623 FunctionHandler]: Unknown extern function abort [2023-02-15 13:02:34,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 13:02:34,900 INFO L208 MainTranslator]: Completed translation [2023-02-15 13:02:34,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:02:34 WrapperNode [2023-02-15 13:02:34,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 13:02:34,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 13:02:34,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 13:02:34,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 13:02:34,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:02:34" (1/1) ... [2023-02-15 13:02:34,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:02:34" (1/1) ... [2023-02-15 13:02:34,965 INFO L138 Inliner]: procedures = 181, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 215 [2023-02-15 13:02:34,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 13:02:34,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 13:02:34,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 13:02:34,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 13:02:34,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:02:34" (1/1) ... [2023-02-15 13:02:34,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:02:34" (1/1) ... [2023-02-15 13:02:34,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:02:34" (1/1) ... [2023-02-15 13:02:34,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:02:34" (1/1) ... [2023-02-15 13:02:34,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:02:34" (1/1) ... [2023-02-15 13:02:35,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:02:34" (1/1) ... [2023-02-15 13:02:35,005 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:02:34" (1/1) ... [2023-02-15 13:02:35,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:02:34" (1/1) ... [2023-02-15 13:02:35,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 13:02:35,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 13:02:35,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 13:02:35,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 13:02:35,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:02:34" (1/1) ... [2023-02-15 13:02:35,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 13:02:35,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:02:35,059 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) [2023-02-15 13:02:35,061 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 [2023-02-15 13:02:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-02-15 13:02:35,096 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-02-15 13:02:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 13:02:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 13:02:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 13:02:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 13:02:35,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 13:02:35,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 13:02:35,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-15 13:02:35,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 13:02:35,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 13:02:35,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 13:02:35,210 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 13:02:35,212 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 13:02:35,543 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 13:02:35,548 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 13:02:35,551 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-15 13:02:35,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:02:35 BoogieIcfgContainer [2023-02-15 13:02:35,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 13:02:35,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 13:02:35,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 13:02:35,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 13:02:35,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:02:34" (1/3) ... [2023-02-15 13:02:35,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f4c75e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:02:35, skipping insertion in model container [2023-02-15 13:02:35,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:02:34" (2/3) ... [2023-02-15 13:02:35,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f4c75e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:02:35, skipping insertion in model container [2023-02-15 13:02:35,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:02:35" (3/3) ... [2023-02-15 13:02:35,559 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2023-02-15 13:02:35,571 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 13:02:35,571 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2023-02-15 13:02:35,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 13:02:35,623 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=PETRI_NET, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@570d6ef8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 13:02:35,623 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2023-02-15 13:02:35,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 86 states have (on average 1.941860465116279) internal successors, (167), 143 states have internal predecessors, (167), 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) [2023-02-15 13:02:35,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 13:02:35,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:35,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 13:02:35,631 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:35,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:35,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1044165707, now seen corresponding path program 1 times [2023-02-15 13:02:35,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:35,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181877772] [2023-02-15 13:02:35,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:35,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:35,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:35,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181877772] [2023-02-15 13:02:35,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181877772] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:35,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:35,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:02:35,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520721717] [2023-02-15 13:02:35,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:35,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 13:02:35,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:35,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 13:02:35,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 13:02:35,784 INFO L87 Difference]: Start difference. First operand has 147 states, 86 states have (on average 1.941860465116279) internal successors, (167), 143 states have internal predecessors, (167), 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) [2023-02-15 13:02:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:35,814 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2023-02-15 13:02:35,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 13:02:35,817 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 [2023-02-15 13:02:35,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:35,823 INFO L225 Difference]: With dead ends: 147 [2023-02-15 13:02:35,823 INFO L226 Difference]: Without dead ends: 144 [2023-02-15 13:02:35,824 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 [2023-02-15 13:02:35,828 INFO L413 NwaCegarLoop]: 166 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, 166 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 [2023-02-15 13:02:35,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:02:35,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-15 13:02:35,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-02-15 13:02:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 84 states have (on average 1.880952380952381) internal successors, (158), 140 states have internal predecessors, (158), 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) [2023-02-15 13:02:35,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2023-02-15 13:02:35,888 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 6 [2023-02-15 13:02:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:35,888 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2023-02-15 13:02:35,888 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) [2023-02-15 13:02:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2023-02-15 13:02:35,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 13:02:35,889 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:35,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:02:35,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 13:02:35,890 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:35,891 INFO L85 PathProgramCache]: Analyzing trace with hash 594325856, now seen corresponding path program 1 times [2023-02-15 13:02:35,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:35,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861699804] [2023-02-15 13:02:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:35,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:35,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:35,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861699804] [2023-02-15 13:02:35,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861699804] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:35,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:35,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:02:35,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209257286] [2023-02-15 13:02:35,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:36,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:02:36,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:36,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:02:36,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:02:36,000 INFO L87 Difference]: Start difference. First operand 144 states and 162 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) [2023-02-15 13:02:36,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:36,034 INFO L93 Difference]: Finished difference Result 286 states and 321 transitions. [2023-02-15 13:02:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:02:36,034 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 [2023-02-15 13:02:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:36,036 INFO L225 Difference]: With dead ends: 286 [2023-02-15 13:02:36,036 INFO L226 Difference]: Without dead ends: 286 [2023-02-15 13:02:36,036 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 [2023-02-15 13:02:36,037 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 158 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:36,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 467 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:02:36,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-02-15 13:02:36,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 146. [2023-02-15 13:02:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 86 states have (on average 1.8604651162790697) internal successors, (160), 142 states have internal predecessors, (160), 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) [2023-02-15 13:02:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 164 transitions. [2023-02-15 13:02:36,044 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 164 transitions. Word has length 8 [2023-02-15 13:02:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:36,044 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 164 transitions. [2023-02-15 13:02:36,045 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) [2023-02-15 13:02:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 164 transitions. [2023-02-15 13:02:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 13:02:36,045 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:36,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:02:36,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 13:02:36,046 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:36,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash 592478814, now seen corresponding path program 1 times [2023-02-15 13:02:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:36,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006007900] [2023-02-15 13:02:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:36,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:36,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:36,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006007900] [2023-02-15 13:02:36,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006007900] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:36,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:36,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:02:36,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170183576] [2023-02-15 13:02:36,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:36,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:02:36,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:36,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:02:36,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:02:36,202 INFO L87 Difference]: Start difference. First operand 146 states and 164 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) [2023-02-15 13:02:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:36,353 INFO L93 Difference]: Finished difference Result 266 states and 297 transitions. [2023-02-15 13:02:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:02:36,353 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 [2023-02-15 13:02:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:36,360 INFO L225 Difference]: With dead ends: 266 [2023-02-15 13:02:36,360 INFO L226 Difference]: Without dead ends: 266 [2023-02-15 13:02:36,361 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 [2023-02-15 13:02:36,361 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 145 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 350 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 [2023-02-15 13:02:36,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 350 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-02-15 13:02:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 198. [2023-02-15 13:02:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 135 states have (on average 1.8592592592592592) internal successors, (251), 192 states have internal predecessors, (251), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 13:02:36,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2023-02-15 13:02:36,380 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 8 [2023-02-15 13:02:36,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:36,380 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2023-02-15 13:02:36,380 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) [2023-02-15 13:02:36,380 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2023-02-15 13:02:36,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 13:02:36,381 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:36,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:02:36,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 13:02:36,381 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash 592478813, now seen corresponding path program 1 times [2023-02-15 13:02:36,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:36,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774991447] [2023-02-15 13:02:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:36,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:36,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:36,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774991447] [2023-02-15 13:02:36,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774991447] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:36,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:36,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-02-15 13:02:36,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029104272] [2023-02-15 13:02:36,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:36,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:02:36,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:36,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:02:36,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:02:36,417 INFO L87 Difference]: Start difference. First operand 198 states and 259 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) [2023-02-15 13:02:36,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:36,553 INFO L93 Difference]: Finished difference Result 381 states and 498 transitions. [2023-02-15 13:02:36,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:02:36,554 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 [2023-02-15 13:02:36,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:36,556 INFO L225 Difference]: With dead ends: 381 [2023-02-15 13:02:36,556 INFO L226 Difference]: Without dead ends: 381 [2023-02-15 13:02:36,556 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 [2023-02-15 13:02:36,557 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 142 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 211 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 [2023-02-15 13:02:36,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 211 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:36,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-02-15 13:02:36,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 280. [2023-02-15 13:02:36,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 211 states have (on average 1.8056872037914693) internal successors, (381), 269 states have internal predecessors, (381), 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) [2023-02-15 13:02:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 397 transitions. [2023-02-15 13:02:36,569 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 397 transitions. Word has length 8 [2023-02-15 13:02:36,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:36,569 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 397 transitions. [2023-02-15 13:02:36,569 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) [2023-02-15 13:02:36,569 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 397 transitions. [2023-02-15 13:02:36,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 13:02:36,570 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:36,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:02:36,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 13:02:36,570 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)] === [2023-02-15 13:02:36,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:36,570 INFO L85 PathProgramCache]: Analyzing trace with hash 592478876, now seen corresponding path program 1 times [2023-02-15 13:02:36,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:36,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814261586] [2023-02-15 13:02:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:36,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:36,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:36,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814261586] [2023-02-15 13:02:36,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814261586] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:36,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:36,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:02:36,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280951054] [2023-02-15 13:02:36,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:36,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:02:36,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:36,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:02:36,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:02:36,647 INFO L87 Difference]: Start difference. First operand 280 states and 397 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) [2023-02-15 13:02:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:36,767 INFO L93 Difference]: Finished difference Result 351 states and 440 transitions. [2023-02-15 13:02:36,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:02:36,767 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 [2023-02-15 13:02:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:36,768 INFO L225 Difference]: With dead ends: 351 [2023-02-15 13:02:36,769 INFO L226 Difference]: Without dead ends: 351 [2023-02-15 13:02:36,769 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 [2023-02-15 13:02:36,770 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 127 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:36,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 365 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:36,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-02-15 13:02:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 280. [2023-02-15 13:02:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 211 states have (on average 1.8056872037914693) internal successors, (381), 269 states have internal predecessors, (381), 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) [2023-02-15 13:02:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 397 transitions. [2023-02-15 13:02:36,779 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 397 transitions. Word has length 8 [2023-02-15 13:02:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:36,779 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 397 transitions. [2023-02-15 13:02:36,779 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) [2023-02-15 13:02:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 397 transitions. [2023-02-15 13:02:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 13:02:36,780 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:36,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:02:36,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 13:02:36,780 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)] === [2023-02-15 13:02:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:36,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1779058665, now seen corresponding path program 1 times [2023-02-15 13:02:36,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:36,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795565749] [2023-02-15 13:02:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:36,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:36,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:36,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795565749] [2023-02-15 13:02:36,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795565749] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:36,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:36,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:02:36,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524794471] [2023-02-15 13:02:36,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:36,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:02:36,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:36,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:02:36,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:02:36,803 INFO L87 Difference]: Start difference. First operand 280 states and 397 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) [2023-02-15 13:02:36,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:36,813 INFO L93 Difference]: Finished difference Result 383 states and 497 transitions. [2023-02-15 13:02:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:02:36,814 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 [2023-02-15 13:02:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:36,815 INFO L225 Difference]: With dead ends: 383 [2023-02-15 13:02:36,815 INFO L226 Difference]: Without dead ends: 383 [2023-02-15 13:02:36,815 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 [2023-02-15 13:02:36,816 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 133 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 316 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 [2023-02-15 13:02:36,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 316 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:02:36,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-02-15 13:02:36,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 282. [2023-02-15 13:02:36,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 213 states have (on average 1.7887323943661972) internal successors, (381), 271 states have internal predecessors, (381), 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) [2023-02-15 13:02:36,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 397 transitions. [2023-02-15 13:02:36,822 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 397 transitions. Word has length 11 [2023-02-15 13:02:36,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:36,823 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 397 transitions. [2023-02-15 13:02:36,823 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) [2023-02-15 13:02:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 397 transitions. [2023-02-15 13:02:36,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 13:02:36,823 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:36,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:02:36,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 13:02:36,824 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)] === [2023-02-15 13:02:36,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:36,824 INFO L85 PathProgramCache]: Analyzing trace with hash 683754949, now seen corresponding path program 1 times [2023-02-15 13:02:36,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:36,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847252009] [2023-02-15 13:02:36,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:36,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:36,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:36,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847252009] [2023-02-15 13:02:36,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847252009] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:36,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:36,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:02:36,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883775664] [2023-02-15 13:02:36,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:36,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:02:36,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:36,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:02:36,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:02:36,857 INFO L87 Difference]: Start difference. First operand 282 states and 397 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) [2023-02-15 13:02:36,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:36,926 INFO L93 Difference]: Finished difference Result 337 states and 448 transitions. [2023-02-15 13:02:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:02:36,927 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 [2023-02-15 13:02:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:36,929 INFO L225 Difference]: With dead ends: 337 [2023-02-15 13:02:36,929 INFO L226 Difference]: Without dead ends: 330 [2023-02-15 13:02:36,929 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 [2023-02-15 13:02:36,932 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 75 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 239 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 [2023-02-15 13:02:36,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 239 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-02-15 13:02:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 279. [2023-02-15 13:02:36,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 210 states have (on average 1.7904761904761906) internal successors, (376), 268 states have internal predecessors, (376), 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) [2023-02-15 13:02:36,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 392 transitions. [2023-02-15 13:02:36,939 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 392 transitions. Word has length 12 [2023-02-15 13:02:36,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:36,939 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 392 transitions. [2023-02-15 13:02:36,940 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) [2023-02-15 13:02:36,940 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 392 transitions. [2023-02-15 13:02:36,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 13:02:36,941 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:36,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:02:36,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 13:02:36,941 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)] === [2023-02-15 13:02:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash -930261550, now seen corresponding path program 1 times [2023-02-15 13:02:36,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:36,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673125230] [2023-02-15 13:02:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:36,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:36,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:37,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:37,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673125230] [2023-02-15 13:02:37,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673125230] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:37,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:37,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:02:37,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551958699] [2023-02-15 13:02:37,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:37,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:02:37,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:37,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:02:37,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:02:37,003 INFO L87 Difference]: Start difference. First operand 279 states and 392 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) [2023-02-15 13:02:37,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:37,030 INFO L93 Difference]: Finished difference Result 439 states and 602 transitions. [2023-02-15 13:02:37,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:02:37,031 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 [2023-02-15 13:02:37,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:37,032 INFO L225 Difference]: With dead ends: 439 [2023-02-15 13:02:37,032 INFO L226 Difference]: Without dead ends: 439 [2023-02-15 13:02:37,032 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 [2023-02-15 13:02:37,033 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 148 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:37,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 452 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:02:37,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-02-15 13:02:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 283. [2023-02-15 13:02:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 214 states have (on average 1.766355140186916) internal successors, (378), 272 states have internal predecessors, (378), 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) [2023-02-15 13:02:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 394 transitions. [2023-02-15 13:02:37,038 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 394 transitions. Word has length 14 [2023-02-15 13:02:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:37,038 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 394 transitions. [2023-02-15 13:02:37,039 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) [2023-02-15 13:02:37,039 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 394 transitions. [2023-02-15 13:02:37,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 13:02:37,039 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:37,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:02:37,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 13:02:37,040 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)] === [2023-02-15 13:02:37,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:37,040 INFO L85 PathProgramCache]: Analyzing trace with hash -120914924, now seen corresponding path program 1 times [2023-02-15 13:02:37,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:37,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515949197] [2023-02-15 13:02:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:37,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:37,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:37,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:37,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515949197] [2023-02-15 13:02:37,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515949197] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:37,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:37,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:02:37,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583530108] [2023-02-15 13:02:37,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:37,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:02:37,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:37,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:02:37,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:02:37,079 INFO L87 Difference]: Start difference. First operand 283 states and 394 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) [2023-02-15 13:02:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:37,252 INFO L93 Difference]: Finished difference Result 406 states and 490 transitions. [2023-02-15 13:02:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:02:37,255 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 [2023-02-15 13:02:37,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:37,256 INFO L225 Difference]: With dead ends: 406 [2023-02-15 13:02:37,256 INFO L226 Difference]: Without dead ends: 406 [2023-02-15 13:02:37,256 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 [2023-02-15 13:02:37,258 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 269 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 357 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 [2023-02-15 13:02:37,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 357 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:37,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-02-15 13:02:37,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 283. [2023-02-15 13:02:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 214 states have (on average 1.7383177570093458) internal successors, (372), 272 states have internal predecessors, (372), 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) [2023-02-15 13:02:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 388 transitions. [2023-02-15 13:02:37,264 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 388 transitions. Word has length 14 [2023-02-15 13:02:37,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:37,264 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 388 transitions. [2023-02-15 13:02:37,265 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) [2023-02-15 13:02:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 388 transitions. [2023-02-15 13:02:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 13:02:37,265 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:37,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:02:37,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 13:02:37,266 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)] === [2023-02-15 13:02:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:37,266 INFO L85 PathProgramCache]: Analyzing trace with hash -120914923, now seen corresponding path program 1 times [2023-02-15 13:02:37,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:37,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808322554] [2023-02-15 13:02:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:37,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:37,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:37,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:37,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808322554] [2023-02-15 13:02:37,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808322554] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:37,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:37,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:02:37,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408856863] [2023-02-15 13:02:37,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:37,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:02:37,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:37,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:02:37,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:02:37,434 INFO L87 Difference]: Start difference. First operand 283 states and 388 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) [2023-02-15 13:02:37,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:37,616 INFO L93 Difference]: Finished difference Result 323 states and 397 transitions. [2023-02-15 13:02:37,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 13:02:37,617 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 [2023-02-15 13:02:37,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:37,618 INFO L225 Difference]: With dead ends: 323 [2023-02-15 13:02:37,618 INFO L226 Difference]: Without dead ends: 323 [2023-02-15 13:02:37,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 13:02:37,619 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 97 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:37,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 609 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:37,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-02-15 13:02:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 287. [2023-02-15 13:02:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 218 states have (on average 1.7293577981651376) internal successors, (377), 274 states have internal predecessors, (377), 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) [2023-02-15 13:02:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 393 transitions. [2023-02-15 13:02:37,626 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 393 transitions. Word has length 14 [2023-02-15 13:02:37,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:37,626 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 393 transitions. [2023-02-15 13:02:37,626 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) [2023-02-15 13:02:37,626 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 393 transitions. [2023-02-15 13:02:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 13:02:37,628 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:37,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:02:37,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 13:02:37,628 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)] === [2023-02-15 13:02:37,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:37,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1042256562, now seen corresponding path program 1 times [2023-02-15 13:02:37,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:37,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505802528] [2023-02-15 13:02:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:37,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:37,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 13:02:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:37,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:37,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505802528] [2023-02-15 13:02:37,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505802528] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:37,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:37,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:02:37,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303302412] [2023-02-15 13:02:37,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:37,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:02:37,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:37,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:02:37,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:02:37,673 INFO L87 Difference]: Start difference. First operand 287 states and 393 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) [2023-02-15 13:02:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:37,831 INFO L93 Difference]: Finished difference Result 466 states and 595 transitions. [2023-02-15 13:02:37,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:02:37,832 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 [2023-02-15 13:02:37,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:37,834 INFO L225 Difference]: With dead ends: 466 [2023-02-15 13:02:37,834 INFO L226 Difference]: Without dead ends: 466 [2023-02-15 13:02:37,834 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 [2023-02-15 13:02:37,835 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 260 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 370 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 [2023-02-15 13:02:37,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 370 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:37,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-02-15 13:02:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 293. [2023-02-15 13:02:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 224 states have (on average 1.7098214285714286) internal successors, (383), 280 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) [2023-02-15 13:02:37,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 399 transitions. [2023-02-15 13:02:37,841 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 399 transitions. Word has length 17 [2023-02-15 13:02:37,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:37,841 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 399 transitions. [2023-02-15 13:02:37,842 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) [2023-02-15 13:02:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 399 transitions. [2023-02-15 13:02:37,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 13:02:37,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:37,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 13:02:37,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 13:02:37,843 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)] === [2023-02-15 13:02:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:37,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1042256563, now seen corresponding path program 1 times [2023-02-15 13:02:37,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:37,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425113618] [2023-02-15 13:02:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:37,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:37,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 13:02:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:37,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:37,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425113618] [2023-02-15 13:02:37,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425113618] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:37,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:37,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:02:37,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671139464] [2023-02-15 13:02:37,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:37,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:02:37,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:37,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:02:37,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:02:37,916 INFO L87 Difference]: Start difference. First operand 293 states and 399 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) [2023-02-15 13:02:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:38,034 INFO L93 Difference]: Finished difference Result 342 states and 419 transitions. [2023-02-15 13:02:38,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:02:38,034 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 [2023-02-15 13:02:38,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:38,035 INFO L225 Difference]: With dead ends: 342 [2023-02-15 13:02:38,036 INFO L226 Difference]: Without dead ends: 342 [2023-02-15 13:02:38,036 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 [2023-02-15 13:02:38,036 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 178 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 374 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 [2023-02-15 13:02:38,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 374 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-02-15 13:02:38,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 293. [2023-02-15 13:02:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 224 states have (on average 1.6830357142857142) internal successors, (377), 280 states have internal predecessors, (377), 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) [2023-02-15 13:02:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 393 transitions. [2023-02-15 13:02:38,043 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 393 transitions. Word has length 17 [2023-02-15 13:02:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:38,044 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 393 transitions. [2023-02-15 13:02:38,045 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) [2023-02-15 13:02:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 393 transitions. [2023-02-15 13:02:38,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 13:02:38,047 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:38,047 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] [2023-02-15 13:02:38,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-15 13:02:38,048 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)] === [2023-02-15 13:02:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:38,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1738140034, now seen corresponding path program 1 times [2023-02-15 13:02:38,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:38,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119742152] [2023-02-15 13:02:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:38,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:38,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:38,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:38,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119742152] [2023-02-15 13:02:38,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119742152] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:38,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:38,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 13:02:38,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981806923] [2023-02-15 13:02:38,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:38,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:02:38,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:38,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:02:38,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:02:38,083 INFO L87 Difference]: Start difference. First operand 293 states and 393 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) [2023-02-15 13:02:38,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:38,153 INFO L93 Difference]: Finished difference Result 385 states and 494 transitions. [2023-02-15 13:02:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:02:38,154 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 [2023-02-15 13:02:38,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:38,156 INFO L225 Difference]: With dead ends: 385 [2023-02-15 13:02:38,156 INFO L226 Difference]: Without dead ends: 385 [2023-02-15 13:02:38,156 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 [2023-02-15 13:02:38,157 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 135 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 263 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 [2023-02-15 13:02:38,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 263 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:38,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-02-15 13:02:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 290. [2023-02-15 13:02:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 224 states have (on average 1.65625) internal successors, (371), 277 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) [2023-02-15 13:02:38,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 387 transitions. [2023-02-15 13:02:38,164 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 387 transitions. Word has length 20 [2023-02-15 13:02:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:38,165 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 387 transitions. [2023-02-15 13:02:38,165 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) [2023-02-15 13:02:38,165 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 387 transitions. [2023-02-15 13:02:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 13:02:38,166 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:38,166 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] [2023-02-15 13:02:38,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-15 13:02:38,167 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)] === [2023-02-15 13:02:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:38,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1738140033, now seen corresponding path program 1 times [2023-02-15 13:02:38,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:38,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789797806] [2023-02-15 13:02:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:38,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:38,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:38,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:38,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789797806] [2023-02-15 13:02:38,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789797806] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:38,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:38,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:02:38,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102578837] [2023-02-15 13:02:38,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:38,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:02:38,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:38,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:02:38,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:02:38,264 INFO L87 Difference]: Start difference. First operand 290 states and 387 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) [2023-02-15 13:02:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:38,382 INFO L93 Difference]: Finished difference Result 505 states and 618 transitions. [2023-02-15 13:02:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:02:38,383 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 [2023-02-15 13:02:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:38,384 INFO L225 Difference]: With dead ends: 505 [2023-02-15 13:02:38,384 INFO L226 Difference]: Without dead ends: 505 [2023-02-15 13:02:38,385 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 [2023-02-15 13:02:38,385 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 361 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:38,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 423 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:38,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-02-15 13:02:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 293. [2023-02-15 13:02:38,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 228 states have (on average 1.6359649122807018) internal successors, (373), 280 states have internal predecessors, (373), 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) [2023-02-15 13:02:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 389 transitions. [2023-02-15 13:02:38,391 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 389 transitions. Word has length 20 [2023-02-15 13:02:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:38,392 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 389 transitions. [2023-02-15 13:02:38,392 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) [2023-02-15 13:02:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 389 transitions. [2023-02-15 13:02:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 13:02:38,393 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:38,393 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] [2023-02-15 13:02:38,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-15 13:02:38,393 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)] === [2023-02-15 13:02:38,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1952233834, now seen corresponding path program 1 times [2023-02-15 13:02:38,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:38,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918606910] [2023-02-15 13:02:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:38,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:38,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:38,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:38,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918606910] [2023-02-15 13:02:38,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918606910] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:38,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:38,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:02:38,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989496290] [2023-02-15 13:02:38,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:38,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:02:38,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:38,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:02:38,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:02:38,473 INFO L87 Difference]: Start difference. First operand 293 states and 389 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) [2023-02-15 13:02:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:38,605 INFO L93 Difference]: Finished difference Result 504 states and 616 transitions. [2023-02-15 13:02:38,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:02:38,606 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 [2023-02-15 13:02:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:38,607 INFO L225 Difference]: With dead ends: 504 [2023-02-15 13:02:38,607 INFO L226 Difference]: Without dead ends: 504 [2023-02-15 13:02:38,607 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 [2023-02-15 13:02:38,608 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 285 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:38,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 492 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-02-15 13:02:38,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 295. [2023-02-15 13:02:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 230 states have (on average 1.6304347826086956) internal successors, (375), 282 states have internal predecessors, (375), 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) [2023-02-15 13:02:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 391 transitions. [2023-02-15 13:02:38,613 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 391 transitions. Word has length 21 [2023-02-15 13:02:38,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:38,613 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 391 transitions. [2023-02-15 13:02:38,613 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) [2023-02-15 13:02:38,613 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 391 transitions. [2023-02-15 13:02:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 13:02:38,613 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:38,614 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] [2023-02-15 13:02:38,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-15 13:02:38,614 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)] === [2023-02-15 13:02:38,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:38,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1952289538, now seen corresponding path program 1 times [2023-02-15 13:02:38,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:38,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6119772] [2023-02-15 13:02:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:38,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:38,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:38,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:38,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6119772] [2023-02-15 13:02:38,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6119772] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:38,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:38,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 13:02:38,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282292964] [2023-02-15 13:02:38,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:38,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:02:38,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:38,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:02:38,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:02:38,691 INFO L87 Difference]: Start difference. First operand 295 states and 391 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) [2023-02-15 13:02:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:38,781 INFO L93 Difference]: Finished difference Result 328 states and 393 transitions. [2023-02-15 13:02:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 13:02:38,781 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 [2023-02-15 13:02:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:38,782 INFO L225 Difference]: With dead ends: 328 [2023-02-15 13:02:38,782 INFO L226 Difference]: Without dead ends: 328 [2023-02-15 13:02:38,782 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 [2023-02-15 13:02:38,783 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 337 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:38,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 991 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-02-15 13:02:38,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 295. [2023-02-15 13:02:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 230 states have (on average 1.6217391304347826) internal successors, (373), 282 states have internal predecessors, (373), 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) [2023-02-15 13:02:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 389 transitions. [2023-02-15 13:02:38,787 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 389 transitions. Word has length 21 [2023-02-15 13:02:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:38,788 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 389 transitions. [2023-02-15 13:02:38,788 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) [2023-02-15 13:02:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 389 transitions. [2023-02-15 13:02:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 13:02:38,788 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:38,788 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] [2023-02-15 13:02:38,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-15 13:02:38,789 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)] === [2023-02-15 13:02:38,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:38,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1952291460, now seen corresponding path program 1 times [2023-02-15 13:02:38,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:38,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156043000] [2023-02-15 13:02:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:38,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:38,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:38,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:38,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156043000] [2023-02-15 13:02:38,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156043000] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:38,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:38,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 13:02:38,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813772324] [2023-02-15 13:02:38,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:38,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:02:38,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:38,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:02:38,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:02:38,875 INFO L87 Difference]: Start difference. First operand 295 states and 389 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) [2023-02-15 13:02:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:38,950 INFO L93 Difference]: Finished difference Result 318 states and 379 transitions. [2023-02-15 13:02:38,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 13:02:38,951 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 [2023-02-15 13:02:38,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:38,952 INFO L225 Difference]: With dead ends: 318 [2023-02-15 13:02:38,952 INFO L226 Difference]: Without dead ends: 318 [2023-02-15 13:02:38,952 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 [2023-02-15 13:02:38,952 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 326 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:38,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 998 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:02:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-02-15 13:02:38,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 285. [2023-02-15 13:02:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 222 states have (on average 1.617117117117117) internal successors, (359), 272 states have internal predecessors, (359), 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) [2023-02-15 13:02:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 375 transitions. [2023-02-15 13:02:38,957 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 375 transitions. Word has length 21 [2023-02-15 13:02:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:38,957 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 375 transitions. [2023-02-15 13:02:38,957 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) [2023-02-15 13:02:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 375 transitions. [2023-02-15 13:02:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 13:02:38,958 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:38,958 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] [2023-02-15 13:02:38,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-15 13:02:38,958 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)] === [2023-02-15 13:02:38,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:38,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1056785802, now seen corresponding path program 1 times [2023-02-15 13:02:38,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:38,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769938964] [2023-02-15 13:02:38,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:38,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:39,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 13:02:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:39,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:39,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769938964] [2023-02-15 13:02:39,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769938964] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:39,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:39,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 13:02:39,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443297268] [2023-02-15 13:02:39,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:39,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 13:02:39,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:39,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 13:02:39,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-15 13:02:39,290 INFO L87 Difference]: Start difference. First operand 285 states and 375 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) [2023-02-15 13:02:39,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:39,835 INFO L93 Difference]: Finished difference Result 398 states and 505 transitions. [2023-02-15 13:02:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 13:02:39,835 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 [2023-02-15 13:02:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:39,837 INFO L225 Difference]: With dead ends: 398 [2023-02-15 13:02:39,837 INFO L226 Difference]: Without dead ends: 396 [2023-02-15 13:02:39,837 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 [2023-02-15 13:02:39,837 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 234 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:39,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 805 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:02:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-02-15 13:02:39,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 337. [2023-02-15 13:02:39,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 269 states have (on average 1.5910780669144982) internal successors, (428), 320 states have internal predecessors, (428), 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) [2023-02-15 13:02:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 450 transitions. [2023-02-15 13:02:39,843 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 450 transitions. Word has length 23 [2023-02-15 13:02:39,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:39,843 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 450 transitions. [2023-02-15 13:02:39,843 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) [2023-02-15 13:02:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 450 transitions. [2023-02-15 13:02:39,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 13:02:39,844 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:39,844 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] [2023-02-15 13:02:39,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-15 13:02:39,844 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)] === [2023-02-15 13:02:39,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:39,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1951233503, now seen corresponding path program 1 times [2023-02-15 13:02:39,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:39,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054091455] [2023-02-15 13:02:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:39,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:39,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 13:02:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:39,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054091455] [2023-02-15 13:02:39,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054091455] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:39,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:39,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:02:39,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947336134] [2023-02-15 13:02:39,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:39,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:02:39,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:39,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:02:39,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:02:39,884 INFO L87 Difference]: Start difference. First operand 337 states and 450 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) [2023-02-15 13:02:40,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:40,022 INFO L93 Difference]: Finished difference Result 504 states and 649 transitions. [2023-02-15 13:02:40,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:02:40,022 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 [2023-02-15 13:02:40,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:40,024 INFO L225 Difference]: With dead ends: 504 [2023-02-15 13:02:40,024 INFO L226 Difference]: Without dead ends: 504 [2023-02-15 13:02:40,024 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 [2023-02-15 13:02:40,025 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 224 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 354 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 [2023-02-15 13:02:40,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 354 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:40,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-02-15 13:02:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 361. [2023-02-15 13:02:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 293 states have (on average 1.6245733788395904) internal successors, (476), 344 states have internal predecessors, (476), 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) [2023-02-15 13:02:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 498 transitions. [2023-02-15 13:02:40,031 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 498 transitions. Word has length 25 [2023-02-15 13:02:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:40,031 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 498 transitions. [2023-02-15 13:02:40,032 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) [2023-02-15 13:02:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 498 transitions. [2023-02-15 13:02:40,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 13:02:40,032 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:40,032 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] [2023-02-15 13:02:40,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-15 13:02:40,032 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)] === [2023-02-15 13:02:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:40,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1951233502, now seen corresponding path program 1 times [2023-02-15 13:02:40,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:40,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046216059] [2023-02-15 13:02:40,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:40,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:40,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 13:02:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:40,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:40,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046216059] [2023-02-15 13:02:40,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046216059] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:40,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:40,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:02:40,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15164006] [2023-02-15 13:02:40,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:40,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:02:40,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:40,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:02:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:02:40,154 INFO L87 Difference]: Start difference. First operand 361 states and 498 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) [2023-02-15 13:02:40,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:40,338 INFO L93 Difference]: Finished difference Result 412 states and 520 transitions. [2023-02-15 13:02:40,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:02:40,338 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 [2023-02-15 13:02:40,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:40,339 INFO L225 Difference]: With dead ends: 412 [2023-02-15 13:02:40,340 INFO L226 Difference]: Without dead ends: 412 [2023-02-15 13:02:40,340 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 [2023-02-15 13:02:40,340 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 331 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:40,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 434 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:40,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-02-15 13:02:40,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 361. [2023-02-15 13:02:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 293 states have (on average 1.583617747440273) internal successors, (464), 344 states have internal predecessors, (464), 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) [2023-02-15 13:02:40,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 486 transitions. [2023-02-15 13:02:40,345 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 486 transitions. Word has length 25 [2023-02-15 13:02:40,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:40,346 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 486 transitions. [2023-02-15 13:02:40,346 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) [2023-02-15 13:02:40,346 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 486 transitions. [2023-02-15 13:02:40,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 13:02:40,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:40,346 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] [2023-02-15 13:02:40,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-15 13:02:40,347 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)] === [2023-02-15 13:02:40,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:40,347 INFO L85 PathProgramCache]: Analyzing trace with hash 456369005, now seen corresponding path program 1 times [2023-02-15 13:02:40,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:40,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137606443] [2023-02-15 13:02:40,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:40,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:40,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:40,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:40,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137606443] [2023-02-15 13:02:40,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137606443] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:40,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:40,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 13:02:40,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938374231] [2023-02-15 13:02:40,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:40,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 13:02:40,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:40,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 13:02:40,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:02:40,557 INFO L87 Difference]: Start difference. First operand 361 states and 486 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) [2023-02-15 13:02:40,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:40,828 INFO L93 Difference]: Finished difference Result 639 states and 825 transitions. [2023-02-15 13:02:40,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:02:40,828 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 [2023-02-15 13:02:40,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:40,830 INFO L225 Difference]: With dead ends: 639 [2023-02-15 13:02:40,830 INFO L226 Difference]: Without dead ends: 639 [2023-02-15 13:02:40,830 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 [2023-02-15 13:02:40,831 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 504 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:40,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1099 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:02:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2023-02-15 13:02:40,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 423. [2023-02-15 13:02:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 352 states have (on average 1.5482954545454546) internal successors, (545), 403 states have internal predecessors, (545), 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) [2023-02-15 13:02:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 571 transitions. [2023-02-15 13:02:40,838 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 571 transitions. Word has length 25 [2023-02-15 13:02:40,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:40,838 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 571 transitions. [2023-02-15 13:02:40,838 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) [2023-02-15 13:02:40,838 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 571 transitions. [2023-02-15 13:02:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 13:02:40,839 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:40,839 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] [2023-02-15 13:02:40,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-15 13:02:40,839 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)] === [2023-02-15 13:02:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:40,839 INFO L85 PathProgramCache]: Analyzing trace with hash 484106160, now seen corresponding path program 1 times [2023-02-15 13:02:40,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:40,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194330347] [2023-02-15 13:02:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:40,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:41,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:41,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:41,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194330347] [2023-02-15 13:02:41,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194330347] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:41,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:41,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 13:02:41,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617494620] [2023-02-15 13:02:41,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:41,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:02:41,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:41,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:02:41,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:02:41,005 INFO L87 Difference]: Start difference. First operand 423 states and 571 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) [2023-02-15 13:02:41,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:41,216 INFO L93 Difference]: Finished difference Result 532 states and 666 transitions. [2023-02-15 13:02:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 13:02:41,217 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 [2023-02-15 13:02:41,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:41,219 INFO L225 Difference]: With dead ends: 532 [2023-02-15 13:02:41,219 INFO L226 Difference]: Without dead ends: 532 [2023-02-15 13:02:41,219 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 [2023-02-15 13:02:41,220 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 948 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:41,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 342 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:41,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-02-15 13:02:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 439. [2023-02-15 13:02:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 373 states have (on average 1.5308310991957104) internal successors, (571), 418 states have internal predecessors, (571), 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) [2023-02-15 13:02:41,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 599 transitions. [2023-02-15 13:02:41,227 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 599 transitions. Word has length 27 [2023-02-15 13:02:41,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:41,227 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 599 transitions. [2023-02-15 13:02:41,228 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) [2023-02-15 13:02:41,228 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 599 transitions. [2023-02-15 13:02:41,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 13:02:41,228 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:41,228 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] [2023-02-15 13:02:41,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-15 13:02:41,229 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:41,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:41,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1109766870, now seen corresponding path program 1 times [2023-02-15 13:02:41,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:41,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724434718] [2023-02-15 13:02:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:41,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:41,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 13:02:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:41,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:41,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724434718] [2023-02-15 13:02:41,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724434718] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:41,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:41,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 13:02:41,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480925454] [2023-02-15 13:02:41,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:41,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:02:41,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:41,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:02:41,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:02:41,342 INFO L87 Difference]: Start difference. First operand 439 states and 599 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) [2023-02-15 13:02:41,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:41,534 INFO L93 Difference]: Finished difference Result 691 states and 907 transitions. [2023-02-15 13:02:41,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:02:41,535 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 [2023-02-15 13:02:41,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:41,536 INFO L225 Difference]: With dead ends: 691 [2023-02-15 13:02:41,536 INFO L226 Difference]: Without dead ends: 691 [2023-02-15 13:02:41,537 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 [2023-02-15 13:02:41,537 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 466 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:41,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 939 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:41,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2023-02-15 13:02:41,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 436. [2023-02-15 13:02:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 373 states have (on average 1.5040214477211795) internal successors, (561), 415 states have internal predecessors, (561), 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) [2023-02-15 13:02:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 589 transitions. [2023-02-15 13:02:41,544 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 589 transitions. Word has length 28 [2023-02-15 13:02:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:41,544 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 589 transitions. [2023-02-15 13:02:41,544 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) [2023-02-15 13:02:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 589 transitions. [2023-02-15 13:02:41,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 13:02:41,545 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:41,545 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] [2023-02-15 13:02:41,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-15 13:02:41,545 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:41,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:41,546 INFO L85 PathProgramCache]: Analyzing trace with hash 2122389103, now seen corresponding path program 1 times [2023-02-15 13:02:41,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:41,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404625301] [2023-02-15 13:02:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:41,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:41,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:41,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:41,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404625301] [2023-02-15 13:02:41,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404625301] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:41,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:41,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:02:41,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901800848] [2023-02-15 13:02:41,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:41,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:02:41,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:41,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:02:41,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:02:41,627 INFO L87 Difference]: Start difference. First operand 436 states and 589 transitions. Second operand has 6 states, 5 states have (on average 5.2) 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) [2023-02-15 13:02:41,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:41,707 INFO L93 Difference]: Finished difference Result 459 states and 587 transitions. [2023-02-15 13:02:41,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:02:41,707 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) 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 [2023-02-15 13:02:41,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:41,708 INFO L225 Difference]: With dead ends: 459 [2023-02-15 13:02:41,709 INFO L226 Difference]: Without dead ends: 459 [2023-02-15 13:02:41,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:02:41,709 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 522 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:41,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 437 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-02-15 13:02:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 434. [2023-02-15 13:02:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 373 states have (on average 1.4932975871313674) internal successors, (557), 413 states have internal predecessors, (557), 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) [2023-02-15 13:02:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 585 transitions. [2023-02-15 13:02:41,716 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 585 transitions. Word has length 28 [2023-02-15 13:02:41,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:41,716 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 585 transitions. [2023-02-15 13:02:41,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) 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) [2023-02-15 13:02:41,716 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 585 transitions. [2023-02-15 13:02:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 13:02:41,716 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:41,717 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] [2023-02-15 13:02:41,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-15 13:02:41,717 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:41,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:41,717 INFO L85 PathProgramCache]: Analyzing trace with hash -43057304, now seen corresponding path program 1 times [2023-02-15 13:02:41,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:41,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822155577] [2023-02-15 13:02:41,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:41,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:41,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 13:02:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:41,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:41,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822155577] [2023-02-15 13:02:41,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822155577] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:41,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:41,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:02:41,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213876440] [2023-02-15 13:02:41,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:41,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:02:41,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:41,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:02:41,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:02:41,794 INFO L87 Difference]: Start difference. First operand 434 states and 585 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) [2023-02-15 13:02:41,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:41,891 INFO L93 Difference]: Finished difference Result 493 states and 639 transitions. [2023-02-15 13:02:41,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:02:41,891 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 [2023-02-15 13:02:41,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:41,893 INFO L225 Difference]: With dead ends: 493 [2023-02-15 13:02:41,893 INFO L226 Difference]: Without dead ends: 493 [2023-02-15 13:02:41,893 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 [2023-02-15 13:02:41,893 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 154 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:41,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 520 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-02-15 13:02:41,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 434. [2023-02-15 13:02:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 373 states have (on average 1.4879356568364612) internal successors, (555), 413 states have internal predecessors, (555), 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) [2023-02-15 13:02:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 583 transitions. [2023-02-15 13:02:41,899 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 583 transitions. Word has length 29 [2023-02-15 13:02:41,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:41,900 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 583 transitions. [2023-02-15 13:02:41,900 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) [2023-02-15 13:02:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 583 transitions. [2023-02-15 13:02:41,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 13:02:41,900 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:41,900 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] [2023-02-15 13:02:41,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-15 13:02:41,900 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:41,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:41,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1334068214, now seen corresponding path program 1 times [2023-02-15 13:02:41,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:41,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047335573] [2023-02-15 13:02:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:41,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:42,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 13:02:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:42,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:42,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047335573] [2023-02-15 13:02:42,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047335573] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:42,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:42,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 13:02:42,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138368320] [2023-02-15 13:02:42,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:42,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:02:42,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:42,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:02:42,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:02:42,136 INFO L87 Difference]: Start difference. First operand 434 states and 583 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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) [2023-02-15 13:02:42,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:42,297 INFO L93 Difference]: Finished difference Result 475 states and 613 transitions. [2023-02-15 13:02:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:02:42,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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 [2023-02-15 13:02:42,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:42,299 INFO L225 Difference]: With dead ends: 475 [2023-02-15 13:02:42,299 INFO L226 Difference]: Without dead ends: 475 [2023-02-15 13:02:42,299 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 [2023-02-15 13:02:42,299 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 130 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:42,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 657 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:42,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-02-15 13:02:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 428. [2023-02-15 13:02:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 367 states have (on average 1.4741144414168936) internal successors, (541), 407 states have internal predecessors, (541), 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) [2023-02-15 13:02:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 569 transitions. [2023-02-15 13:02:42,307 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 569 transitions. Word has length 30 [2023-02-15 13:02:42,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:42,307 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 569 transitions. [2023-02-15 13:02:42,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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) [2023-02-15 13:02:42,307 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 569 transitions. [2023-02-15 13:02:42,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 13:02:42,307 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:42,307 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] [2023-02-15 13:02:42,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-15 13:02:42,307 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:42,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:42,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1334776215, now seen corresponding path program 1 times [2023-02-15 13:02:42,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:42,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798367049] [2023-02-15 13:02:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:42,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:42,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 13:02:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:42,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:42,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798367049] [2023-02-15 13:02:42,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798367049] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:42,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:42,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:02:42,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164738797] [2023-02-15 13:02:42,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:42,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:02:42,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:42,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:02:42,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:02:42,411 INFO L87 Difference]: Start difference. First operand 428 states and 569 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) [2023-02-15 13:02:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:42,540 INFO L93 Difference]: Finished difference Result 534 states and 690 transitions. [2023-02-15 13:02:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:02:42,540 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 [2023-02-15 13:02:42,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:42,542 INFO L225 Difference]: With dead ends: 534 [2023-02-15 13:02:42,542 INFO L226 Difference]: Without dead ends: 534 [2023-02-15 13:02:42,542 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 [2023-02-15 13:02:42,542 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 147 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:42,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 473 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2023-02-15 13:02:42,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 468. [2023-02-15 13:02:42,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 404 states have (on average 1.4678217821782178) internal successors, (593), 445 states have internal predecessors, (593), 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) [2023-02-15 13:02:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 625 transitions. [2023-02-15 13:02:42,550 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 625 transitions. Word has length 30 [2023-02-15 13:02:42,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:42,550 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 625 transitions. [2023-02-15 13:02:42,551 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) [2023-02-15 13:02:42,551 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 625 transitions. [2023-02-15 13:02:42,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 13:02:42,551 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:42,551 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] [2023-02-15 13:02:42,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-15 13:02:42,551 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:42,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:42,552 INFO L85 PathProgramCache]: Analyzing trace with hash -493536303, now seen corresponding path program 1 times [2023-02-15 13:02:42,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:42,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153829591] [2023-02-15 13:02:42,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:42,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:42,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:42,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:42,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153829591] [2023-02-15 13:02:42,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153829591] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:42,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:42,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 13:02:42,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092709970] [2023-02-15 13:02:42,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:42,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 13:02:42,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:42,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 13:02:42,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:02:42,700 INFO L87 Difference]: Start difference. First operand 468 states and 625 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 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) [2023-02-15 13:02:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:42,934 INFO L93 Difference]: Finished difference Result 555 states and 683 transitions. [2023-02-15 13:02:42,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 13:02:42,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 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 [2023-02-15 13:02:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:42,936 INFO L225 Difference]: With dead ends: 555 [2023-02-15 13:02:42,936 INFO L226 Difference]: Without dead ends: 555 [2023-02-15 13:02:42,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2023-02-15 13:02:42,936 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 793 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:42,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 344 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:42,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2023-02-15 13:02:42,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 469. [2023-02-15 13:02:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 406 states have (on average 1.458128078817734) internal successors, (592), 445 states have internal predecessors, (592), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-15 13:02:42,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 626 transitions. [2023-02-15 13:02:42,948 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 626 transitions. Word has length 30 [2023-02-15 13:02:42,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:42,948 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 626 transitions. [2023-02-15 13:02:42,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 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) [2023-02-15 13:02:42,949 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 626 transitions. [2023-02-15 13:02:42,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 13:02:42,949 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:42,949 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] [2023-02-15 13:02:42,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-15 13:02:42,949 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)] === [2023-02-15 13:02:42,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:42,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1475285643, now seen corresponding path program 1 times [2023-02-15 13:02:42,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:42,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675716883] [2023-02-15 13:02:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:42,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:43,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 13:02:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:43,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:43,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675716883] [2023-02-15 13:02:43,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675716883] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:43,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:43,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 13:02:43,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884699322] [2023-02-15 13:02:43,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:43,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 13:02:43,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:43,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 13:02:43,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:02:43,126 INFO L87 Difference]: Start difference. First operand 469 states and 626 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) [2023-02-15 13:02:43,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:43,460 INFO L93 Difference]: Finished difference Result 893 states and 1179 transitions. [2023-02-15 13:02:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 13:02:43,460 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 [2023-02-15 13:02:43,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:43,462 INFO L225 Difference]: With dead ends: 893 [2023-02-15 13:02:43,462 INFO L226 Difference]: Without dead ends: 893 [2023-02-15 13:02:43,462 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 [2023-02-15 13:02:43,463 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 340 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:43,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 754 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:02:43,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2023-02-15 13:02:43,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 544. [2023-02-15 13:02:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 475 states have (on average 1.4442105263157894) internal successors, (686), 516 states have internal predecessors, (686), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-15 13:02:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 728 transitions. [2023-02-15 13:02:43,472 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 728 transitions. Word has length 32 [2023-02-15 13:02:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:43,473 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 728 transitions. [2023-02-15 13:02:43,473 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) [2023-02-15 13:02:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 728 transitions. [2023-02-15 13:02:43,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 13:02:43,473 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:43,473 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] [2023-02-15 13:02:43,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-15 13:02:43,474 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)] === [2023-02-15 13:02:43,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:43,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1918246339, now seen corresponding path program 1 times [2023-02-15 13:02:43,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:43,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032389106] [2023-02-15 13:02:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:43,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:43,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-15 13:02:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:43,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:43,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032389106] [2023-02-15 13:02:43,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032389106] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:02:43,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31888211] [2023-02-15 13:02:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:43,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:02:43,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:02:43,506 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) [2023-02-15 13:02:43,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 13:02:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:43,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 13:02:43,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:02:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 13:02:43,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 13:02:43,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31888211] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:43,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 13:02:43,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-02-15 13:02:43,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975024000] [2023-02-15 13:02:43,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:43,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:02:43,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:43,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:02:43,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 13:02:43,620 INFO L87 Difference]: Start difference. First operand 544 states and 728 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) [2023-02-15 13:02:43,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:43,631 INFO L93 Difference]: Finished difference Result 553 states and 736 transitions. [2023-02-15 13:02:43,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:02:43,631 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 [2023-02-15 13:02:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:43,633 INFO L225 Difference]: With dead ends: 553 [2023-02-15 13:02:43,633 INFO L226 Difference]: Without dead ends: 552 [2023-02-15 13:02:43,633 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 [2023-02-15 13:02:43,649 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 273 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 [2023-02-15 13:02:43,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 273 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:02:43,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2023-02-15 13:02:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 548. [2023-02-15 13:02:43,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 479 states have (on average 1.4384133611691023) internal successors, (689), 520 states have internal predecessors, (689), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-15 13:02:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 731 transitions. [2023-02-15 13:02:43,656 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 731 transitions. Word has length 33 [2023-02-15 13:02:43,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:43,656 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 731 transitions. [2023-02-15 13:02:43,656 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) [2023-02-15 13:02:43,656 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 731 transitions. [2023-02-15 13:02:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 13:02:43,657 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:43,657 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] [2023-02-15 13:02:43,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 13:02:43,861 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 [2023-02-15 13:02:43,862 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)] === [2023-02-15 13:02:43,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:43,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1559072507, now seen corresponding path program 1 times [2023-02-15 13:02:43,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:43,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790796262] [2023-02-15 13:02:43,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:43,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:44,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-15 13:02:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:02:44,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:44,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790796262] [2023-02-15 13:02:44,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790796262] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:44,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:44,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 13:02:44,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321160786] [2023-02-15 13:02:44,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:44,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 13:02:44,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:44,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 13:02:44,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-15 13:02:44,258 INFO L87 Difference]: Start difference. First operand 548 states and 731 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) [2023-02-15 13:02:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:44,763 INFO L93 Difference]: Finished difference Result 555 states and 726 transitions. [2023-02-15 13:02:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 13:02:44,764 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 [2023-02-15 13:02:44,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:44,765 INFO L225 Difference]: With dead ends: 555 [2023-02-15 13:02:44,765 INFO L226 Difference]: Without dead ends: 553 [2023-02-15 13:02:44,766 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 [2023-02-15 13:02:44,766 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 196 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:44,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 857 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:02:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2023-02-15 13:02:44,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 505. [2023-02-15 13:02:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 439 states have (on average 1.4328018223234624) internal successors, (629), 479 states have internal predecessors, (629), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-15 13:02:44,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 667 transitions. [2023-02-15 13:02:44,773 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 667 transitions. Word has length 33 [2023-02-15 13:02:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:44,773 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 667 transitions. [2023-02-15 13:02:44,773 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) [2023-02-15 13:02:44,773 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 667 transitions. [2023-02-15 13:02:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 13:02:44,774 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:44,774 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] [2023-02-15 13:02:44,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-15 13:02:44,774 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)] === [2023-02-15 13:02:44,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:44,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1510785108, now seen corresponding path program 1 times [2023-02-15 13:02:44,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:44,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920999977] [2023-02-15 13:02:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:44,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:45,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 13:02:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:45,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:45,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920999977] [2023-02-15 13:02:45,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920999977] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:45,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:45,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 13:02:45,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185700395] [2023-02-15 13:02:45,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:45,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:02:45,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:45,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:02:45,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:02:45,046 INFO L87 Difference]: Start difference. First operand 505 states and 667 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) [2023-02-15 13:02:45,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:45,331 INFO L93 Difference]: Finished difference Result 566 states and 708 transitions. [2023-02-15 13:02:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 13:02:45,331 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 [2023-02-15 13:02:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:45,333 INFO L225 Difference]: With dead ends: 566 [2023-02-15 13:02:45,333 INFO L226 Difference]: Without dead ends: 566 [2023-02-15 13:02:45,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-02-15 13:02:45,333 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 403 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:45,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 535 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:02:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-02-15 13:02:45,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 505. [2023-02-15 13:02:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 439 states have (on average 1.4214123006833712) internal successors, (624), 479 states have internal predecessors, (624), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-15 13:02:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 662 transitions. [2023-02-15 13:02:45,340 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 662 transitions. Word has length 33 [2023-02-15 13:02:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:45,341 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 662 transitions. [2023-02-15 13:02:45,341 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) [2023-02-15 13:02:45,341 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 662 transitions. [2023-02-15 13:02:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 13:02:45,341 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:45,342 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] [2023-02-15 13:02:45,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-15 13:02:45,342 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:45,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:45,342 INFO L85 PathProgramCache]: Analyzing trace with hash 896646995, now seen corresponding path program 1 times [2023-02-15 13:02:45,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:45,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479089040] [2023-02-15 13:02:45,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:45,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:45,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:45,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 13:02:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 13:02:45,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:45,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479089040] [2023-02-15 13:02:45,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479089040] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:45,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:45,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 13:02:45,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055381265] [2023-02-15 13:02:45,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:45,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 13:02:45,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:45,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 13:02:45,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 13:02:45,367 INFO L87 Difference]: Start difference. First operand 505 states and 662 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) [2023-02-15 13:02:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:45,373 INFO L93 Difference]: Finished difference Result 507 states and 664 transitions. [2023-02-15 13:02:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 13:02:45,373 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 [2023-02-15 13:02:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:45,375 INFO L225 Difference]: With dead ends: 507 [2023-02-15 13:02:45,375 INFO L226 Difference]: Without dead ends: 507 [2023-02-15 13:02:45,375 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 [2023-02-15 13:02:45,375 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 274 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 [2023-02-15 13:02:45,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 274 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:02:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-02-15 13:02:45,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2023-02-15 13:02:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 441 states have (on average 1.4195011337868482) internal successors, (626), 481 states have internal predecessors, (626), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-15 13:02:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 664 transitions. [2023-02-15 13:02:45,381 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 664 transitions. Word has length 41 [2023-02-15 13:02:45,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:45,382 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 664 transitions. [2023-02-15 13:02:45,382 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) [2023-02-15 13:02:45,382 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 664 transitions. [2023-02-15 13:02:45,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 13:02:45,382 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:45,383 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] [2023-02-15 13:02:45,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-15 13:02:45,383 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)] === [2023-02-15 13:02:45,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:45,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1705993621, now seen corresponding path program 1 times [2023-02-15 13:02:45,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:45,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356482897] [2023-02-15 13:02:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:45,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:45,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:45,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 13:02:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:02:45,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:45,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356482897] [2023-02-15 13:02:45,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356482897] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:02:45,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727947307] [2023-02-15 13:02:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:45,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:02:45,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:02:45,766 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) [2023-02-15 13:02:45,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 13:02:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:45,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 13:02:45,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:02:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:46,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:02:46,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:02:46,202 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 36 [2023-02-15 13:02:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:02:46,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727947307] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:02:46,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:02:46,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 8] total 23 [2023-02-15 13:02:46,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092812292] [2023-02-15 13:02:46,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:02:46,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 13:02:46,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:46,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 13:02:46,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-02-15 13:02:46,359 INFO L87 Difference]: Start difference. First operand 507 states and 664 transitions. Second operand has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 22 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 13:02:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:46,791 INFO L93 Difference]: Finished difference Result 532 states and 664 transitions. [2023-02-15 13:02:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:02:46,792 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 22 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2023-02-15 13:02:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:46,793 INFO L225 Difference]: With dead ends: 532 [2023-02-15 13:02:46,793 INFO L226 Difference]: Without dead ends: 532 [2023-02-15 13:02:46,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2023-02-15 13:02:46,794 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 1239 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:46,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1239 Valid, 1574 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:02:46,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-02-15 13:02:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 504. [2023-02-15 13:02:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 439 states have (on average 1.4123006833712983) internal successors, (620), 479 states have internal predecessors, (620), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-15 13:02:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 658 transitions. [2023-02-15 13:02:46,800 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 658 transitions. Word has length 41 [2023-02-15 13:02:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:46,801 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 658 transitions. [2023-02-15 13:02:46,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 22 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 13:02:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 658 transitions. [2023-02-15 13:02:46,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 13:02:46,801 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:46,801 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] [2023-02-15 13:02:46,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 13:02:47,006 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,SelfDestructingSolverStorable33 [2023-02-15 13:02:47,006 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:47,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:47,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1350180533, now seen corresponding path program 1 times [2023-02-15 13:02:47,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:47,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162327638] [2023-02-15 13:02:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:47,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:47,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:47,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-15 13:02:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 13:02:47,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:47,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162327638] [2023-02-15 13:02:47,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162327638] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:02:47,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279959058] [2023-02-15 13:02:47,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:47,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:02:47,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:02:47,083 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) [2023-02-15 13:02:47,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 13:02:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:47,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 13:02:47,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:02:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:47,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:02:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 13:02:47,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279959058] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:02:47,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:02:47,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-15 13:02:47,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604019285] [2023-02-15 13:02:47,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:02:47,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 13:02:47,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:47,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 13:02:47,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-15 13:02:47,310 INFO L87 Difference]: Start difference. First operand 504 states and 658 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) [2023-02-15 13:02:47,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:47,359 INFO L93 Difference]: Finished difference Result 1164 states and 1506 transitions. [2023-02-15 13:02:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:02:47,360 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 [2023-02-15 13:02:47,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:47,363 INFO L225 Difference]: With dead ends: 1164 [2023-02-15 13:02:47,363 INFO L226 Difference]: Without dead ends: 1164 [2023-02-15 13:02:47,363 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 [2023-02-15 13:02:47,366 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 718 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:47,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 722 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:02:47,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2023-02-15 13:02:47,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 666. [2023-02-15 13:02:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 595 states have (on average 1.3647058823529412) internal successors, (812), 635 states have internal predecessors, (812), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-15 13:02:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 862 transitions. [2023-02-15 13:02:47,383 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 862 transitions. Word has length 44 [2023-02-15 13:02:47,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:47,383 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 862 transitions. [2023-02-15 13:02:47,384 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) [2023-02-15 13:02:47,384 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 862 transitions. [2023-02-15 13:02:47,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 13:02:47,384 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:47,384 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] [2023-02-15 13:02:47,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 13:02:47,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:02:47,592 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)] === [2023-02-15 13:02:47,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:47,592 INFO L85 PathProgramCache]: Analyzing trace with hash 649115955, now seen corresponding path program 1 times [2023-02-15 13:02:47,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:47,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136920751] [2023-02-15 13:02:47,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:47,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:47,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:47,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-15 13:02:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 13:02:47,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136920751] [2023-02-15 13:02:47,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136920751] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:02:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844462493] [2023-02-15 13:02:47,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:47,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:02:47,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:02:47,728 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) [2023-02-15 13:02:47,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 13:02:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:47,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 13:02:47,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:02:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:48,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 13:02:48,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844462493] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:48,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 13:02:48,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-02-15 13:02:48,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376559205] [2023-02-15 13:02:48,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:48,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:02:48,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:48,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:02:48,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-15 13:02:48,016 INFO L87 Difference]: Start difference. First operand 666 states and 862 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) [2023-02-15 13:02:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:48,198 INFO L93 Difference]: Finished difference Result 860 states and 1070 transitions. [2023-02-15 13:02:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:02:48,199 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 [2023-02-15 13:02:48,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:48,201 INFO L225 Difference]: With dead ends: 860 [2023-02-15 13:02:48,201 INFO L226 Difference]: Without dead ends: 860 [2023-02-15 13:02:48,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-02-15 13:02:48,201 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 457 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:48,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 412 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2023-02-15 13:02:48,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 663. [2023-02-15 13:02:48,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 595 states have (on average 1.3512605042016808) internal successors, (804), 632 states have internal predecessors, (804), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-15 13:02:48,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 854 transitions. [2023-02-15 13:02:48,209 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 854 transitions. Word has length 44 [2023-02-15 13:02:48,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:48,210 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 854 transitions. [2023-02-15 13:02:48,210 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) [2023-02-15 13:02:48,210 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 854 transitions. [2023-02-15 13:02:48,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 13:02:48,210 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:48,211 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] [2023-02-15 13:02:48,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 13:02:48,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:02:48,419 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:48,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:48,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1877190129, now seen corresponding path program 1 times [2023-02-15 13:02:48,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:48,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538261059] [2023-02-15 13:02:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:48,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:48,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 13:02:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:48,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-15 13:02:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 13:02:48,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:48,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538261059] [2023-02-15 13:02:48,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538261059] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:02:48,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883174263] [2023-02-15 13:02:48,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:48,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:02:48,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:02:48,528 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) [2023-02-15 13:02:48,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 13:02:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:48,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 13:02:48,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:02:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:48,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:02:48,789 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 13:02:48,790 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:02:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 13:02:48,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883174263] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:02:48,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:02:48,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-02-15 13:02:48,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442592503] [2023-02-15 13:02:48,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:02:48,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 13:02:48,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:48,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 13:02:48,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-02-15 13:02:48,812 INFO L87 Difference]: Start difference. First operand 663 states and 854 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) [2023-02-15 13:02:49,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:49,320 INFO L93 Difference]: Finished difference Result 2142 states and 2679 transitions. [2023-02-15 13:02:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 13:02:49,320 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 [2023-02-15 13:02:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:49,325 INFO L225 Difference]: With dead ends: 2142 [2023-02-15 13:02:49,325 INFO L226 Difference]: Without dead ends: 2142 [2023-02-15 13:02:49,325 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 [2023-02-15 13:02:49,325 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 1770 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:49,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1772 Valid, 1030 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 13:02:49,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2023-02-15 13:02:49,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 851. [2023-02-15 13:02:49,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 775 states have (on average 1.2967741935483872) internal successors, (1005), 808 states have internal predecessors, (1005), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 30 states have call predecessors, (36), 36 states have call successors, (36) [2023-02-15 13:02:49,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1077 transitions. [2023-02-15 13:02:49,340 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1077 transitions. Word has length 46 [2023-02-15 13:02:49,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:49,341 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1077 transitions. [2023-02-15 13:02:49,341 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) [2023-02-15 13:02:49,341 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1077 transitions. [2023-02-15 13:02:49,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 13:02:49,341 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:49,341 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] [2023-02-15 13:02:49,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 13:02:49,546 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,SelfDestructingSolverStorable36 [2023-02-15 13:02:49,546 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:49,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:49,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1534969807, now seen corresponding path program 1 times [2023-02-15 13:02:49,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:49,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521548385] [2023-02-15 13:02:49,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:49,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:49,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 13:02:49,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:49,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521548385] [2023-02-15 13:02:49,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521548385] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:02:49,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099346355] [2023-02-15 13:02:49,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:49,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:02:49,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:02:49,591 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) [2023-02-15 13:02:49,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 13:02:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:49,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 13:02:49,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:02:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 13:02:49,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:02:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 13:02:49,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099346355] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:02:49,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:02:49,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 7 [2023-02-15 13:02:49,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923371078] [2023-02-15 13:02:49,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:02:49,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:02:49,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:49,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:02:49,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 13:02:49,748 INFO L87 Difference]: Start difference. First operand 851 states and 1077 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) [2023-02-15 13:02:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:49,789 INFO L93 Difference]: Finished difference Result 2768 states and 3486 transitions. [2023-02-15 13:02:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 13:02:49,790 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 [2023-02-15 13:02:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:49,795 INFO L225 Difference]: With dead ends: 2768 [2023-02-15 13:02:49,795 INFO L226 Difference]: Without dead ends: 2768 [2023-02-15 13:02:49,796 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 [2023-02-15 13:02:49,796 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 427 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:49,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 616 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:02:49,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2023-02-15 13:02:49,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 1928. [2023-02-15 13:02:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1792 states have (on average 1.29296875) internal successors, (2317), 1829 states have internal predecessors, (2317), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-15 13:02:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2473 transitions. [2023-02-15 13:02:49,821 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2473 transitions. Word has length 45 [2023-02-15 13:02:49,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:49,821 INFO L495 AbstractCegarLoop]: Abstraction has 1928 states and 2473 transitions. [2023-02-15 13:02:49,822 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) [2023-02-15 13:02:49,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2473 transitions. [2023-02-15 13:02:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 13:02:49,822 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:49,822 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] [2023-02-15 13:02:49,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 13:02:50,027 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,SelfDestructingSolverStorable37 [2023-02-15 13:02:50,027 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)] === [2023-02-15 13:02:50,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:50,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1536816849, now seen corresponding path program 1 times [2023-02-15 13:02:50,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:50,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158157410] [2023-02-15 13:02:50,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:50,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:50,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:50,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:50,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158157410] [2023-02-15 13:02:50,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158157410] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:02:50,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060172053] [2023-02-15 13:02:50,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:50,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:02:50,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:02:50,323 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) [2023-02-15 13:02:50,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 13:02:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:50,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 13:02:50,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:02:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:50,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 13:02:50,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060172053] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:50,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 13:02:50,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2023-02-15 13:02:50,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89356630] [2023-02-15 13:02:50,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:50,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:02:50,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:50,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:02:50,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-02-15 13:02:50,613 INFO L87 Difference]: Start difference. First operand 1928 states and 2473 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) [2023-02-15 13:02:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:50,753 INFO L93 Difference]: Finished difference Result 1976 states and 2504 transitions. [2023-02-15 13:02:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:02:50,753 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 [2023-02-15 13:02:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:50,760 INFO L225 Difference]: With dead ends: 1976 [2023-02-15 13:02:50,760 INFO L226 Difference]: Without dead ends: 1976 [2023-02-15 13:02:50,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-02-15 13:02:50,761 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 419 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:50,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 397 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2023-02-15 13:02:50,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2023-02-15 13:02:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1794 states have (on average 1.2931995540691192) internal successors, (2320), 1831 states have internal predecessors, (2320), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-15 13:02:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2476 transitions. [2023-02-15 13:02:50,788 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2476 transitions. Word has length 45 [2023-02-15 13:02:50,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:50,788 INFO L495 AbstractCegarLoop]: Abstraction has 1930 states and 2476 transitions. [2023-02-15 13:02:50,788 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) [2023-02-15 13:02:50,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2476 transitions. [2023-02-15 13:02:50,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 13:02:50,789 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:50,789 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] [2023-02-15 13:02:50,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 13:02:50,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:02:50,994 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)] === [2023-02-15 13:02:50,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:50,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1536816787, now seen corresponding path program 1 times [2023-02-15 13:02:50,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:50,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967118758] [2023-02-15 13:02:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:50,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:51,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:51,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:51,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967118758] [2023-02-15 13:02:51,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967118758] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:02:51,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568328522] [2023-02-15 13:02:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:51,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:02:51,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:02:51,130 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) [2023-02-15 13:02:51,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 13:02:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:51,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 13:02:51,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:02:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:51,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 13:02:51,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568328522] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:51,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 13:02:51,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-02-15 13:02:51,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427481331] [2023-02-15 13:02:51,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:51,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 13:02:51,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:51,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 13:02:51,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-15 13:02:51,377 INFO L87 Difference]: Start difference. First operand 1930 states and 2476 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) [2023-02-15 13:02:51,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:51,495 INFO L93 Difference]: Finished difference Result 1975 states and 2502 transitions. [2023-02-15 13:02:51,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 13:02:51,495 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 [2023-02-15 13:02:51,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:51,505 INFO L225 Difference]: With dead ends: 1975 [2023-02-15 13:02:51,505 INFO L226 Difference]: Without dead ends: 1975 [2023-02-15 13:02:51,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2023-02-15 13:02:51,505 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 427 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:51,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 354 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2023-02-15 13:02:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1927. [2023-02-15 13:02:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1792 states have (on average 1.2918526785714286) internal successors, (2315), 1828 states have internal predecessors, (2315), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-15 13:02:51,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2471 transitions. [2023-02-15 13:02:51,530 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2471 transitions. Word has length 45 [2023-02-15 13:02:51,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:51,530 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 2471 transitions. [2023-02-15 13:02:51,531 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) [2023-02-15 13:02:51,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2471 transitions. [2023-02-15 13:02:51,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 13:02:51,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:51,535 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] [2023-02-15 13:02:51,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 13:02:51,739 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,SelfDestructingSolverStorable39 [2023-02-15 13:02:51,739 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:51,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:51,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1040806822, now seen corresponding path program 1 times [2023-02-15 13:02:51,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:51,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953328136] [2023-02-15 13:02:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:51,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:53,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:53,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:53,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953328136] [2023-02-15 13:02:53,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953328136] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:53,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:53,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-15 13:02:53,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119349272] [2023-02-15 13:02:53,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:53,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 13:02:53,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:53,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 13:02:53,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-02-15 13:02:53,023 INFO L87 Difference]: Start difference. First operand 1927 states and 2471 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2023-02-15 13:02:53,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:53,541 INFO L93 Difference]: Finished difference Result 1976 states and 2523 transitions. [2023-02-15 13:02:53,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 13:02:53,541 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 [2023-02-15 13:02:53,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:53,544 INFO L225 Difference]: With dead ends: 1976 [2023-02-15 13:02:53,545 INFO L226 Difference]: Without dead ends: 1976 [2023-02-15 13:02:53,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-02-15 13:02:53,545 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 103 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:53,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 717 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:53,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2023-02-15 13:02:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1957. [2023-02-15 13:02:53,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1822 states have (on average 1.2892425905598244) internal successors, (2349), 1858 states have internal predecessors, (2349), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-15 13:02:53,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 2505 transitions. [2023-02-15 13:02:53,595 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 2505 transitions. Word has length 48 [2023-02-15 13:02:53,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:53,596 INFO L495 AbstractCegarLoop]: Abstraction has 1957 states and 2505 transitions. [2023-02-15 13:02:53,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2023-02-15 13:02:53,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 2505 transitions. [2023-02-15 13:02:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 13:02:53,597 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:53,597 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] [2023-02-15 13:02:53,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-02-15 13:02:53,597 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)] === [2023-02-15 13:02:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:53,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1279480752, now seen corresponding path program 1 times [2023-02-15 13:02:53,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:53,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784990675] [2023-02-15 13:02:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:53,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:53,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:53,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:53,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784990675] [2023-02-15 13:02:53,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784990675] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:53,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:53,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 13:02:53,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872488337] [2023-02-15 13:02:53,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:53,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 13:02:53,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:53,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 13:02:53,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-15 13:02:53,775 INFO L87 Difference]: Start difference. First operand 1957 states and 2505 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 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) [2023-02-15 13:02:53,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:53,969 INFO L93 Difference]: Finished difference Result 2179 states and 2767 transitions. [2023-02-15 13:02:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:02:53,970 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 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 [2023-02-15 13:02:53,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:53,980 INFO L225 Difference]: With dead ends: 2179 [2023-02-15 13:02:53,980 INFO L226 Difference]: Without dead ends: 2179 [2023-02-15 13:02:53,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-02-15 13:02:53,981 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 1225 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:53,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1225 Valid, 899 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:02:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2023-02-15 13:02:53,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 1927. [2023-02-15 13:02:53,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1792 states have (on average 1.2756696428571428) internal successors, (2286), 1828 states have internal predecessors, (2286), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-15 13:02:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2442 transitions. [2023-02-15 13:02:54,001 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2442 transitions. Word has length 49 [2023-02-15 13:02:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:54,001 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 2442 transitions. [2023-02-15 13:02:54,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 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) [2023-02-15 13:02:54,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2442 transitions. [2023-02-15 13:02:54,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 13:02:54,002 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:54,002 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] [2023-02-15 13:02:54,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-02-15 13:02:54,003 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:54,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:54,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1385225816, now seen corresponding path program 1 times [2023-02-15 13:02:54,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:54,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250336167] [2023-02-15 13:02:54,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:54,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:54,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:54,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:54,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250336167] [2023-02-15 13:02:54,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250336167] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:54,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:54,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-15 13:02:54,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037968500] [2023-02-15 13:02:54,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:54,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 13:02:54,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:54,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 13:02:54,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-02-15 13:02:54,616 INFO L87 Difference]: Start difference. First operand 1927 states and 2442 transitions. Second operand has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 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) [2023-02-15 13:02:55,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:55,352 INFO L93 Difference]: Finished difference Result 2078 states and 2605 transitions. [2023-02-15 13:02:55,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 13:02:55,352 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 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 [2023-02-15 13:02:55,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:55,355 INFO L225 Difference]: With dead ends: 2078 [2023-02-15 13:02:55,355 INFO L226 Difference]: Without dead ends: 2078 [2023-02-15 13:02:55,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2023-02-15 13:02:55,356 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 1291 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:55,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 1034 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:02:55,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2023-02-15 13:02:55,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1796. [2023-02-15 13:02:55,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1664 states have (on average 1.28125) internal successors, (2132), 1699 states have internal predecessors, (2132), 73 states have call successors, (73), 33 states have call predecessors, (73), 33 states have return successors, (73), 63 states have call predecessors, (73), 73 states have call successors, (73) [2023-02-15 13:02:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2278 transitions. [2023-02-15 13:02:55,375 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2278 transitions. Word has length 49 [2023-02-15 13:02:55,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:55,376 INFO L495 AbstractCegarLoop]: Abstraction has 1796 states and 2278 transitions. [2023-02-15 13:02:55,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 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) [2023-02-15 13:02:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2278 transitions. [2023-02-15 13:02:55,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 13:02:55,377 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:55,377 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] [2023-02-15 13:02:55,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-02-15 13:02:55,377 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:02:55,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:55,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1385225817, now seen corresponding path program 1 times [2023-02-15 13:02:55,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:55,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606921596] [2023-02-15 13:02:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:55,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:56,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:56,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:56,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606921596] [2023-02-15 13:02:56,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606921596] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:56,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:56,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-02-15 13:02:56,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732834830] [2023-02-15 13:02:56,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:56,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 13:02:56,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:56,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 13:02:56,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-02-15 13:02:56,237 INFO L87 Difference]: Start difference. First operand 1796 states and 2278 transitions. Second operand has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 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) [2023-02-15 13:02:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:57,602 INFO L93 Difference]: Finished difference Result 2635 states and 3366 transitions. [2023-02-15 13:02:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 13:02:57,603 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 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 [2023-02-15 13:02:57,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:57,606 INFO L225 Difference]: With dead ends: 2635 [2023-02-15 13:02:57,606 INFO L226 Difference]: Without dead ends: 2635 [2023-02-15 13:02:57,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=482, Invalid=1078, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 13:02:57,607 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 2261 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2261 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:57,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2261 Valid, 1262 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 13:02:57,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2023-02-15 13:02:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2000. [2023-02-15 13:02:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1852 states have (on average 1.2975161987041037) internal successors, (2403), 1891 states have internal predecessors, (2403), 83 states have call successors, (83), 39 states have call predecessors, (83), 39 states have return successors, (83), 69 states have call predecessors, (83), 83 states have call successors, (83) [2023-02-15 13:02:57,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 2569 transitions. [2023-02-15 13:02:57,647 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 2569 transitions. Word has length 49 [2023-02-15 13:02:57,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:57,648 INFO L495 AbstractCegarLoop]: Abstraction has 2000 states and 2569 transitions. [2023-02-15 13:02:57,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 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) [2023-02-15 13:02:57,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 2569 transitions. [2023-02-15 13:02:57,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 13:02:57,649 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:57,649 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] [2023-02-15 13:02:57,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-02-15 13:02:57,649 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)] === [2023-02-15 13:02:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:57,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1387072858, now seen corresponding path program 1 times [2023-02-15 13:02:57,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:57,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538942155] [2023-02-15 13:02:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:57,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:57,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:57,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:57,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538942155] [2023-02-15 13:02:57,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538942155] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:57,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:57,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 13:02:57,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972238115] [2023-02-15 13:02:57,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:57,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 13:02:57,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:57,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 13:02:57,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-15 13:02:57,964 INFO L87 Difference]: Start difference. First operand 2000 states and 2569 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) [2023-02-15 13:02:58,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:58,513 INFO L93 Difference]: Finished difference Result 2610 states and 3303 transitions. [2023-02-15 13:02:58,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 13:02:58,514 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 [2023-02-15 13:02:58,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:58,517 INFO L225 Difference]: With dead ends: 2610 [2023-02-15 13:02:58,517 INFO L226 Difference]: Without dead ends: 2610 [2023-02-15 13:02:58,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2023-02-15 13:02:58,517 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 934 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:58,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 1168 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:02:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2023-02-15 13:02:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 2254. [2023-02-15 13:02:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2074 states have (on average 1.2974927675988428) internal successors, (2691), 2133 states have internal predecessors, (2691), 109 states have call successors, (109), 45 states have call predecessors, (109), 45 states have return successors, (109), 75 states have call predecessors, (109), 109 states have call successors, (109) [2023-02-15 13:02:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 2909 transitions. [2023-02-15 13:02:58,537 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 2909 transitions. Word has length 49 [2023-02-15 13:02:58,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:58,537 INFO L495 AbstractCegarLoop]: Abstraction has 2254 states and 2909 transitions. [2023-02-15 13:02:58,538 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) [2023-02-15 13:02:58,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 2909 transitions. [2023-02-15 13:02:58,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 13:02:58,538 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:58,538 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] [2023-02-15 13:02:58,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-02-15 13:02:58,539 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)] === [2023-02-15 13:02:58,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:58,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1387072859, now seen corresponding path program 1 times [2023-02-15 13:02:58,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:58,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123679273] [2023-02-15 13:02:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:58,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:59,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:59,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:59,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123679273] [2023-02-15 13:02:59,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123679273] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:59,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:02:59,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 13:02:59,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919343539] [2023-02-15 13:02:59,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:59,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 13:02:59,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:59,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 13:02:59,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-15 13:02:59,008 INFO L87 Difference]: Start difference. First operand 2254 states and 2909 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) [2023-02-15 13:02:59,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:59,587 INFO L93 Difference]: Finished difference Result 2745 states and 3475 transitions. [2023-02-15 13:02:59,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 13:02:59,588 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 [2023-02-15 13:02:59,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:59,591 INFO L225 Difference]: With dead ends: 2745 [2023-02-15 13:02:59,591 INFO L226 Difference]: Without dead ends: 2745 [2023-02-15 13:02:59,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2023-02-15 13:02:59,592 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 946 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:59,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [946 Valid, 883 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:02:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2023-02-15 13:02:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2447. [2023-02-15 13:02:59,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2251 states have (on average 1.3091959129275876) internal successors, (2947), 2314 states have internal predecessors, (2947), 119 states have call successors, (119), 51 states have call predecessors, (119), 51 states have return successors, (119), 81 states have call predecessors, (119), 119 states have call successors, (119) [2023-02-15 13:02:59,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3185 transitions. [2023-02-15 13:02:59,614 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3185 transitions. Word has length 49 [2023-02-15 13:02:59,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:59,614 INFO L495 AbstractCegarLoop]: Abstraction has 2447 states and 3185 transitions. [2023-02-15 13:02:59,614 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) [2023-02-15 13:02:59,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3185 transitions. [2023-02-15 13:02:59,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 13:02:59,615 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:59,615 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] [2023-02-15 13:02:59,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-02-15 13:02:59,615 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)] === [2023-02-15 13:02:59,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:02:59,616 INFO L85 PathProgramCache]: Analyzing trace with hash -7673948, now seen corresponding path program 1 times [2023-02-15 13:02:59,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:02:59,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071070948] [2023-02-15 13:02:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:59,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:02:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:59,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:02:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:59,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:02:59,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071070948] [2023-02-15 13:02:59,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071070948] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:02:59,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031570961] [2023-02-15 13:02:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:02:59,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:02:59,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:02:59,670 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) [2023-02-15 13:02:59,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 13:02:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:02:59,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 13:02:59,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:02:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:02:59,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 13:02:59,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031570961] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:02:59,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 13:02:59,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-02-15 13:02:59,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023527555] [2023-02-15 13:02:59,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:02:59,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:02:59,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:02:59,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:02:59,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:02:59,807 INFO L87 Difference]: Start difference. First operand 2447 states and 3185 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) [2023-02-15 13:02:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:02:59,822 INFO L93 Difference]: Finished difference Result 2964 states and 3885 transitions. [2023-02-15 13:02:59,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:02:59,822 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 [2023-02-15 13:02:59,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:02:59,826 INFO L225 Difference]: With dead ends: 2964 [2023-02-15 13:02:59,826 INFO L226 Difference]: Without dead ends: 2964 [2023-02-15 13:02:59,826 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 [2023-02-15 13:02:59,828 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 195 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:02:59,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 318 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:02:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2023-02-15 13:02:59,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2870. [2023-02-15 13:02:59,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2662 states have (on average 1.3260706235912847) internal successors, (3530), 2725 states have internal predecessors, (3530), 131 states have call successors, (131), 51 states have call predecessors, (131), 51 states have return successors, (131), 93 states have call predecessors, (131), 131 states have call successors, (131) [2023-02-15 13:02:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 3792 transitions. [2023-02-15 13:02:59,853 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 3792 transitions. Word has length 50 [2023-02-15 13:02:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:02:59,853 INFO L495 AbstractCegarLoop]: Abstraction has 2870 states and 3792 transitions. [2023-02-15 13:02:59,853 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) [2023-02-15 13:02:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 3792 transitions. [2023-02-15 13:02:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 13:02:59,854 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:02:59,855 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] [2023-02-15 13:02:59,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 13:03:00,059 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 [2023-02-15 13:03:00,060 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)] === [2023-02-15 13:03:00,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:03:00,061 INFO L85 PathProgramCache]: Analyzing trace with hash -384530648, now seen corresponding path program 1 times [2023-02-15 13:03:00,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:03:00,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482044022] [2023-02-15 13:03:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:00,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:03:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:00,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:03:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:00,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-15 13:03:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 13:03:00,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:03:00,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482044022] [2023-02-15 13:03:00,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482044022] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:03:00,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243529669] [2023-02-15 13:03:00,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:00,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:03:00,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:03:00,985 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) [2023-02-15 13:03:00,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 13:03:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:01,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-15 13:03:01,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:03:01,270 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 13:03:01,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 13:03:01,373 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:01,387 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:01,404 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:01,414 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:01,436 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:01,445 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:01,622 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2023-02-15 13:03:01,622 INFO L350 Elim1Store]: Elim1 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 28 [2023-02-15 13:03:01,632 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2023-02-15 13:03:01,632 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:01,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:03:01,848 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2023-02-15 13:03:01,854 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:03:01,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:03:01,855 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2023-02-15 13:03:01,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:03:01,996 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 19 [2023-02-15 13:03:02,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:03:02,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:03:02,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:03:02,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 13:03:02,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2023-02-15 13:03:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:03:02,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:03:16,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243529669] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:03:16,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 13:03:16,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2023-02-15 13:03:16,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684230712] [2023-02-15 13:03:16,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 13:03:16,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 13:03:16,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:03:16,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 13:03:16,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2385, Unknown=5, NotChecked=0, Total=2550 [2023-02-15 13:03:16,186 INFO L87 Difference]: Start difference. First operand 2870 states and 3792 transitions. Second operand has 35 states, 35 states have (on average 2.6) internal successors, (91), 35 states have internal predecessors, (91), 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) [2023-02-15 13:03:22,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:03:22,861 INFO L93 Difference]: Finished difference Result 3280 states and 4241 transitions. [2023-02-15 13:03:22,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-15 13:03:22,862 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6) internal successors, (91), 35 states have internal predecessors, (91), 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 51 [2023-02-15 13:03:22,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:03:22,867 INFO L225 Difference]: With dead ends: 3280 [2023-02-15 13:03:22,867 INFO L226 Difference]: Without dead ends: 3276 [2023-02-15 13:03:22,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=1342, Invalid=8159, Unknown=5, NotChecked=0, Total=9506 [2023-02-15 13:03:22,874 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 2302 mSDsluCounter, 4435 mSDsCounter, 0 mSdLazyCounter, 2918 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2302 SdHoareTripleChecker+Valid, 4602 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-15 13:03:22,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2302 Valid, 4602 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2918 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-15 13:03:22,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2023-02-15 13:03:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2864. [2023-02-15 13:03:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2656 states have (on average 1.3226656626506024) internal successors, (3513), 2718 states have internal predecessors, (3513), 131 states have call successors, (131), 51 states have call predecessors, (131), 51 states have return successors, (131), 94 states have call predecessors, (131), 131 states have call successors, (131) [2023-02-15 13:03:22,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 3775 transitions. [2023-02-15 13:03:22,968 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 3775 transitions. Word has length 51 [2023-02-15 13:03:22,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:03:22,969 INFO L495 AbstractCegarLoop]: Abstraction has 2864 states and 3775 transitions. [2023-02-15 13:03:22,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6) internal successors, (91), 35 states have internal predecessors, (91), 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) [2023-02-15 13:03:22,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 3775 transitions. [2023-02-15 13:03:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 13:03:22,971 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:03:22,972 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] [2023-02-15 13:03:22,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-15 13:03:23,177 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,SelfDestructingSolverStorable47 [2023-02-15 13:03:23,178 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)] === [2023-02-15 13:03:23,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:03:23,179 INFO L85 PathProgramCache]: Analyzing trace with hash -987996839, now seen corresponding path program 1 times [2023-02-15 13:03:23,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:03:23,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560433354] [2023-02-15 13:03:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:23,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:03:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:23,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 13:03:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:03:23,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:03:23,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560433354] [2023-02-15 13:03:23,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560433354] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:03:23,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:03:23,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 13:03:23,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657205273] [2023-02-15 13:03:23,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:03:23,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 13:03:23,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:03:23,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 13:03:23,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 13:03:23,265 INFO L87 Difference]: Start difference. First operand 2864 states and 3775 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) [2023-02-15 13:03:23,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:03:23,281 INFO L93 Difference]: Finished difference Result 3639 states and 4858 transitions. [2023-02-15 13:03:23,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 13:03:23,282 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 [2023-02-15 13:03:23,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:03:23,287 INFO L225 Difference]: With dead ends: 3639 [2023-02-15 13:03:23,287 INFO L226 Difference]: Without dead ends: 3639 [2023-02-15 13:03:23,287 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 [2023-02-15 13:03:23,288 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 116 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:03:23,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 441 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:03:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2023-02-15 13:03:23,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2490. [2023-02-15 13:03:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2306 states have (on average 1.303122289679098) internal successors, (3005), 2364 states have internal predecessors, (3005), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2023-02-15 13:03:23,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3237 transitions. [2023-02-15 13:03:23,319 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3237 transitions. Word has length 51 [2023-02-15 13:03:23,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:03:23,319 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 3237 transitions. [2023-02-15 13:03:23,319 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) [2023-02-15 13:03:23,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3237 transitions. [2023-02-15 13:03:23,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 13:03:23,320 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:03:23,320 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] [2023-02-15 13:03:23,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-02-15 13:03:23,320 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)] === [2023-02-15 13:03:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:03:23,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1781712484, now seen corresponding path program 1 times [2023-02-15 13:03:23,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:03:23,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443268654] [2023-02-15 13:03:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:23,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:03:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:23,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 13:03:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:03:23,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:03:23,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443268654] [2023-02-15 13:03:23,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443268654] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:03:23,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047130997] [2023-02-15 13:03:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:23,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:03:23,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:03:23,445 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) [2023-02-15 13:03:23,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 13:03:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:23,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 13:03:23,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:03:23,816 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:03:23,817 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:03:23,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:03:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:03:23,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047130997] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:03:23,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:03:23,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 15 [2023-02-15 13:03:23,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762330352] [2023-02-15 13:03:23,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:03:23,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 13:03:23,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:03:23,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 13:03:23,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-15 13:03:23,984 INFO L87 Difference]: Start difference. First operand 2490 states and 3237 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) [2023-02-15 13:03:24,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:03:24,495 INFO L93 Difference]: Finished difference Result 3674 states and 4798 transitions. [2023-02-15 13:03:24,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 13:03:24,496 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 [2023-02-15 13:03:24,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:03:24,524 INFO L225 Difference]: With dead ends: 3674 [2023-02-15 13:03:24,524 INFO L226 Difference]: Without dead ends: 3666 [2023-02-15 13:03:24,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-02-15 13:03:24,526 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 470 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:03:24,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1382 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:03:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2023-02-15 13:03:24,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 2502. [2023-02-15 13:03:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2318 states have (on average 1.3002588438308886) internal successors, (3014), 2376 states have internal predecessors, (3014), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2023-02-15 13:03:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 3246 transitions. [2023-02-15 13:03:24,589 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 3246 transitions. Word has length 52 [2023-02-15 13:03:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:03:24,589 INFO L495 AbstractCegarLoop]: Abstraction has 2502 states and 3246 transitions. [2023-02-15 13:03:24,589 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) [2023-02-15 13:03:24,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 3246 transitions. [2023-02-15 13:03:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 13:03:24,591 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:03:24,591 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] [2023-02-15 13:03:24,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 13:03:24,796 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,SelfDestructingSolverStorable49 [2023-02-15 13:03:24,796 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)] === [2023-02-15 13:03:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:03:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1216726984, now seen corresponding path program 1 times [2023-02-15 13:03:24,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:03:24,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248645915] [2023-02-15 13:03:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:24,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:03:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:25,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:03:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:03:25,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:03:25,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248645915] [2023-02-15 13:03:25,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248645915] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:03:25,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:03:25,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-02-15 13:03:25,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593991162] [2023-02-15 13:03:25,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:03:25,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 13:03:25,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:03:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 13:03:25,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-02-15 13:03:25,354 INFO L87 Difference]: Start difference. First operand 2502 states and 3246 transitions. Second operand has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 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) [2023-02-15 13:03:25,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:03:25,901 INFO L93 Difference]: Finished difference Result 2673 states and 3431 transitions. [2023-02-15 13:03:25,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 13:03:25,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 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 [2023-02-15 13:03:25,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:03:25,924 INFO L225 Difference]: With dead ends: 2673 [2023-02-15 13:03:25,924 INFO L226 Difference]: Without dead ends: 2673 [2023-02-15 13:03:25,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2023-02-15 13:03:25,925 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 1207 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 13:03:25,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 917 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 13:03:25,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2023-02-15 13:03:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2516. [2023-02-15 13:03:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2332 states have (on average 1.300171526586621) internal successors, (3032), 2390 states have internal predecessors, (3032), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2023-02-15 13:03:25,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 3264 transitions. [2023-02-15 13:03:25,985 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 3264 transitions. Word has length 52 [2023-02-15 13:03:25,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:03:25,985 INFO L495 AbstractCegarLoop]: Abstraction has 2516 states and 3264 transitions. [2023-02-15 13:03:25,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 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) [2023-02-15 13:03:25,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 3264 transitions. [2023-02-15 13:03:25,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 13:03:25,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:03:25,986 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] [2023-02-15 13:03:25,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-02-15 13:03:25,987 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)] === [2023-02-15 13:03:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:03:25,987 INFO L85 PathProgramCache]: Analyzing trace with hash 407380358, now seen corresponding path program 1 times [2023-02-15 13:03:25,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:03:25,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349128687] [2023-02-15 13:03:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:25,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:03:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:26,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:03:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:03:26,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:03:26,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349128687] [2023-02-15 13:03:26,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349128687] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:03:26,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 13:03:26,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 13:03:26,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570345895] [2023-02-15 13:03:26,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:03:26,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 13:03:26,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:03:26,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 13:03:26,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-15 13:03:26,419 INFO L87 Difference]: Start difference. First operand 2516 states and 3264 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) [2023-02-15 13:03:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:03:26,874 INFO L93 Difference]: Finished difference Result 2880 states and 3681 transitions. [2023-02-15 13:03:26,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 13:03:26,901 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 [2023-02-15 13:03:26,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:03:26,905 INFO L225 Difference]: With dead ends: 2880 [2023-02-15 13:03:26,905 INFO L226 Difference]: Without dead ends: 2880 [2023-02-15 13:03:26,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2023-02-15 13:03:26,906 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 984 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:03:26,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 894 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:03:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2023-02-15 13:03:26,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2503. [2023-02-15 13:03:26,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2319 states have (on average 1.3001293661060802) internal successors, (3015), 2377 states have internal predecessors, (3015), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2023-02-15 13:03:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 3247 transitions. [2023-02-15 13:03:26,931 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 3247 transitions. Word has length 52 [2023-02-15 13:03:26,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:03:26,932 INFO L495 AbstractCegarLoop]: Abstraction has 2503 states and 3247 transitions. [2023-02-15 13:03:26,932 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) [2023-02-15 13:03:26,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 3247 transitions. [2023-02-15 13:03:26,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 13:03:26,933 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:03:26,933 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] [2023-02-15 13:03:26,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-02-15 13:03:26,933 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)] === [2023-02-15 13:03:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:03:26,933 INFO L85 PathProgramCache]: Analyzing trace with hash -159124908, now seen corresponding path program 1 times [2023-02-15 13:03:26,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:03:26,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685813008] [2023-02-15 13:03:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:26,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:03:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:27,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:03:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:27,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-15 13:03:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 13:03:27,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:03:27,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685813008] [2023-02-15 13:03:27,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685813008] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:03:27,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499099403] [2023-02-15 13:03:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:27,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:03:27,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:03:27,139 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) [2023-02-15 13:03:27,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 13:03:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:27,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 13:03:27,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:03:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:03:27,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 13:03:27,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499099403] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:03:27,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 13:03:27,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 15 [2023-02-15 13:03:27,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786155148] [2023-02-15 13:03:27,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:03:27,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 13:03:27,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:03:27,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 13:03:27,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-02-15 13:03:27,548 INFO L87 Difference]: Start difference. First operand 2503 states and 3247 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) [2023-02-15 13:03:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:03:27,850 INFO L93 Difference]: Finished difference Result 2911 states and 3718 transitions. [2023-02-15 13:03:27,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 13:03:27,851 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 [2023-02-15 13:03:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:03:27,855 INFO L225 Difference]: With dead ends: 2911 [2023-02-15 13:03:27,855 INFO L226 Difference]: Without dead ends: 2911 [2023-02-15 13:03:27,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-02-15 13:03:27,856 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 439 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 13:03:27,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 475 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 13:03:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2023-02-15 13:03:27,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2501. [2023-02-15 13:03:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2319 states have (on average 1.2923673997412677) internal successors, (2997), 2375 states have internal predecessors, (2997), 116 states have call successors, (116), 42 states have call predecessors, (116), 42 states have return successors, (116), 83 states have call predecessors, (116), 116 states have call successors, (116) [2023-02-15 13:03:27,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 3229 transitions. [2023-02-15 13:03:27,880 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 3229 transitions. Word has length 53 [2023-02-15 13:03:27,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:03:27,880 INFO L495 AbstractCegarLoop]: Abstraction has 2501 states and 3229 transitions. [2023-02-15 13:03:27,880 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) [2023-02-15 13:03:27,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 3229 transitions. [2023-02-15 13:03:27,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 13:03:27,881 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:03:27,881 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] [2023-02-15 13:03:27,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 13:03:28,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:03:28,086 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)] === [2023-02-15 13:03:28,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:03:28,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2046489697, now seen corresponding path program 1 times [2023-02-15 13:03:28,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:03:28,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627257711] [2023-02-15 13:03:28,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:28,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:03:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:28,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:03:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:28,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 13:03:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:03:28,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:03:28,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627257711] [2023-02-15 13:03:28,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627257711] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:03:28,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682450029] [2023-02-15 13:03:28,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:28,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:03:28,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:03:28,823 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) [2023-02-15 13:03:28,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 13:03:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:28,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-15 13:03:28,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:03:29,153 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 13:03:29,154 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:29,265 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:29,269 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:29,283 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:29,289 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:29,297 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:29,310 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:29,494 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 13:03:29,495 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:29,507 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 13:03:29,507 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:29,612 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:03:29,612 INFO L350 Elim1Store]: Elim1 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 89 treesize of output 77 [2023-02-15 13:03:29,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:03:29,782 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 28 [2023-02-15 13:03:29,966 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:03:29,966 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 13 [2023-02-15 13:03:30,021 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-02-15 13:03:30,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-02-15 13:03:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:03:30,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:03:30,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682450029] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:03:30,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 13:03:30,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 32 [2023-02-15 13:03:30,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259123930] [2023-02-15 13:03:30,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 13:03:30,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 13:03:30,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:03:30,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 13:03:30,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 13:03:30,254 INFO L87 Difference]: Start difference. First operand 2501 states and 3229 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) [2023-02-15 13:03:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:03:33,280 INFO L93 Difference]: Finished difference Result 4064 states and 5287 transitions. [2023-02-15 13:03:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-15 13:03:33,280 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 [2023-02-15 13:03:33,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:03:33,290 INFO L225 Difference]: With dead ends: 4064 [2023-02-15 13:03:33,291 INFO L226 Difference]: Without dead ends: 4064 [2023-02-15 13:03:33,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=979, Invalid=5183, Unknown=0, NotChecked=0, Total=6162 [2023-02-15 13:03:33,292 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 2225 mSDsluCounter, 3554 mSDsCounter, 0 mSdLazyCounter, 2821 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2229 SdHoareTripleChecker+Valid, 3800 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 13:03:33,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2229 Valid, 3800 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2821 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 13:03:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2023-02-15 13:03:33,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 2637. [2023-02-15 13:03:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2445 states have (on average 1.2834355828220858) internal successors, (3138), 2505 states have internal predecessors, (3138), 124 states have call successors, (124), 44 states have call predecessors, (124), 44 states have return successors, (124), 87 states have call predecessors, (124), 124 states have call successors, (124) [2023-02-15 13:03:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 3386 transitions. [2023-02-15 13:03:33,322 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 3386 transitions. Word has length 53 [2023-02-15 13:03:33,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:03:33,322 INFO L495 AbstractCegarLoop]: Abstraction has 2637 states and 3386 transitions. [2023-02-15 13:03:33,322 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) [2023-02-15 13:03:33,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 3386 transitions. [2023-02-15 13:03:33,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 13:03:33,323 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:03:33,323 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] [2023-02-15 13:03:33,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-15 13:03:33,528 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,SelfDestructingSolverStorable53 [2023-02-15 13:03:33,528 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)] === [2023-02-15 13:03:33,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:03:33,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2046489696, now seen corresponding path program 1 times [2023-02-15 13:03:33,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:03:33,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449489332] [2023-02-15 13:03:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:33,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:03:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:34,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:03:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:34,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 13:03:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 13:03:34,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:03:34,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449489332] [2023-02-15 13:03:34,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449489332] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:03:34,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092185542] [2023-02-15 13:03:34,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:34,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:03:34,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:03:34,779 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) [2023-02-15 13:03:34,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 13:03:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:34,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 97 conjunts are in the unsatisfiable core [2023-02-15 13:03:34,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:03:35,113 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 13:03:35,113 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:35,127 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:35,250 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:35,260 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:35,270 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:35,280 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:35,300 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:35,305 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:35,515 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 13:03:35,515 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:35,527 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-02-15 13:03:35,527 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:35,863 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:03:35,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:03:35,865 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 37 [2023-02-15 13:03:35,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:03:35,876 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 22 [2023-02-15 13:03:36,143 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:03:36,144 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:36,147 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:03:36,148 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 22 [2023-02-15 13:03:36,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:03:36,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 13:03:36,226 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-02-15 13:03:36,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 13:03:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:03:36,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:03:38,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092185542] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:03:38,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 13:03:38,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 36 [2023-02-15 13:03:38,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154120237] [2023-02-15 13:03:38,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 13:03:38,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 13:03:38,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:03:38,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 13:03:38,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 13:03:38,753 INFO L87 Difference]: Start difference. First operand 2637 states and 3386 transitions. Second operand has 37 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 35 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) [2023-02-15 13:03:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:03:44,750 INFO L93 Difference]: Finished difference Result 5255 states and 6918 transitions. [2023-02-15 13:03:44,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-15 13:03:44,750 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 35 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 [2023-02-15 13:03:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:03:44,757 INFO L225 Difference]: With dead ends: 5255 [2023-02-15 13:03:44,758 INFO L226 Difference]: Without dead ends: 5255 [2023-02-15 13:03:44,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1564, Invalid=8536, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 13:03:44,759 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 3421 mSDsluCounter, 4917 mSDsCounter, 0 mSdLazyCounter, 4631 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3425 SdHoareTripleChecker+Valid, 5196 SdHoareTripleChecker+Invalid, 4837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 4631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:03:44,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3425 Valid, 5196 Invalid, 4837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 4631 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-02-15 13:03:44,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5255 states. [2023-02-15 13:03:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5255 to 2685. [2023-02-15 13:03:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2493 states have (on average 1.2691536301644606) internal successors, (3164), 2549 states have internal predecessors, (3164), 124 states have call successors, (124), 44 states have call predecessors, (124), 44 states have return successors, (124), 91 states have call predecessors, (124), 124 states have call successors, (124) [2023-02-15 13:03:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 3412 transitions. [2023-02-15 13:03:44,828 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 3412 transitions. Word has length 53 [2023-02-15 13:03:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:03:44,829 INFO L495 AbstractCegarLoop]: Abstraction has 2685 states and 3412 transitions. [2023-02-15 13:03:44,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 35 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) [2023-02-15 13:03:44,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 3412 transitions. [2023-02-15 13:03:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 13:03:44,830 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:03:44,830 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] [2023-02-15 13:03:44,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 13:03:45,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:03:45,039 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)] === [2023-02-15 13:03:45,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:03:45,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2096673869, now seen corresponding path program 1 times [2023-02-15 13:03:45,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:03:45,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021471979] [2023-02-15 13:03:45,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:45,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:03:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:45,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 13:03:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:45,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 13:03:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 13:03:45,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:03:45,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021471979] [2023-02-15 13:03:45,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021471979] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:03:45,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112388715] [2023-02-15 13:03:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:45,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:03:45,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:03:45,136 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) [2023-02-15 13:03:45,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 13:03:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:45,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 13:03:45,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:03:45,380 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:03:45,381 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 7 [2023-02-15 13:03:45,384 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 13:03:45,384 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 7 [2023-02-15 13:03:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 13:03:45,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 13:03:45,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112388715] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 13:03:45,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 13:03:45,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2023-02-15 13:03:45,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284769036] [2023-02-15 13:03:45,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 13:03:45,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 13:03:45,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:03:45,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 13:03:45,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-02-15 13:03:45,434 INFO L87 Difference]: Start difference. First operand 2685 states and 3412 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) [2023-02-15 13:03:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:03:45,703 INFO L93 Difference]: Finished difference Result 2540 states and 3177 transitions. [2023-02-15 13:03:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 13:03:45,704 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 [2023-02-15 13:03:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:03:45,706 INFO L225 Difference]: With dead ends: 2540 [2023-02-15 13:03:45,707 INFO L226 Difference]: Without dead ends: 2540 [2023-02-15 13:03:45,707 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 [2023-02-15 13:03:45,707 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 222 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 13:03:45,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 1017 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 13:03:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2023-02-15 13:03:45,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2130. [2023-02-15 13:03:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 1978 states have (on average 1.2553083923154702) internal successors, (2483), 2024 states have internal predecessors, (2483), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 76 states have call predecessors, (99), 99 states have call successors, (99) [2023-02-15 13:03:45,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 2681 transitions. [2023-02-15 13:03:45,727 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 2681 transitions. Word has length 54 [2023-02-15 13:03:45,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:03:45,727 INFO L495 AbstractCegarLoop]: Abstraction has 2130 states and 2681 transitions. [2023-02-15 13:03:45,727 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) [2023-02-15 13:03:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 2681 transitions. [2023-02-15 13:03:45,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 13:03:45,728 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:03:45,728 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] [2023-02-15 13:03:45,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 13:03:45,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:03:45,934 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:03:45,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:03:45,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2010110243, now seen corresponding path program 1 times [2023-02-15 13:03:45,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:03:45,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742457828] [2023-02-15 13:03:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:45,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:03:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:45,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:03:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:03:45,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:03:45,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742457828] [2023-02-15 13:03:45,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742457828] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:03:45,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229475842] [2023-02-15 13:03:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:45,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:03:45,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:03:45,979 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) [2023-02-15 13:03:46,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 13:03:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:46,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 13:03:46,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:03:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:03:46,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:03:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:03:46,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229475842] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 13:03:46,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 13:03:46,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-02-15 13:03:46,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961283728] [2023-02-15 13:03:46,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 13:03:46,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 13:03:46,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 13:03:46,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 13:03:46,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:03:46,258 INFO L87 Difference]: Start difference. First operand 2130 states and 2681 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) [2023-02-15 13:03:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 13:03:46,287 INFO L93 Difference]: Finished difference Result 4141 states and 5286 transitions. [2023-02-15 13:03:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 13:03:46,288 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 [2023-02-15 13:03:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 13:03:46,292 INFO L225 Difference]: With dead ends: 4141 [2023-02-15 13:03:46,292 INFO L226 Difference]: Without dead ends: 4141 [2023-02-15 13:03:46,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-15 13:03:46,292 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 270 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 13:03:46,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 596 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 13:03:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2023-02-15 13:03:46,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3226. [2023-02-15 13:03:46,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 3026 states have (on average 1.2785855915399869) internal successors, (3869), 3078 states have internal predecessors, (3869), 147 states have call successors, (147), 29 states have call predecessors, (147), 29 states have return successors, (147), 118 states have call predecessors, (147), 147 states have call successors, (147) [2023-02-15 13:03:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 4163 transitions. [2023-02-15 13:03:46,328 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 4163 transitions. Word has length 55 [2023-02-15 13:03:46,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 13:03:46,329 INFO L495 AbstractCegarLoop]: Abstraction has 3226 states and 4163 transitions. [2023-02-15 13:03:46,329 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) [2023-02-15 13:03:46,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 4163 transitions. [2023-02-15 13:03:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 13:03:46,330 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 13:03:46,330 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] [2023-02-15 13:03:46,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 13:03:46,535 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,SelfDestructingSolverStorable56 [2023-02-15 13:03:46,535 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-15 13:03:46,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 13:03:46,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2111090623, now seen corresponding path program 1 times [2023-02-15 13:03:46,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 13:03:46,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775601529] [2023-02-15 13:03:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:46,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 13:03:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:47,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 13:03:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:03:47,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 13:03:47,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775601529] [2023-02-15 13:03:47,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775601529] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 13:03:47,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405941896] [2023-02-15 13:03:47,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 13:03:47,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 13:03:47,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 13:03:47,247 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) [2023-02-15 13:03:47,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 13:03:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 13:03:47,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 13:03:47,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 13:03:47,821 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:47,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 13:03:47,920 INFO L350 Elim1Store]: Elim1 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 43 treesize of output 34 [2023-02-15 13:03:48,083 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 15 [2023-02-15 13:03:48,113 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 13:03:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 13:03:48,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 13:03:48,212 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1324 Int)) (= (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_1324)) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2023-02-15 13:03:48,253 INFO L350 Elim1Store]: Elim1 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 150 treesize of output 142 [2023-02-15 13:05:50,570 WARN L233 SmtUtils]: Spent 2.04m on a formula simplification. DAG size of input: 73 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 13:06:33,849 WARN L233 SmtUtils]: Spent 39.22s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)