./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 26d01a9c 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/ldv-memsafety/ArraysOfVariableLength2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 03:01:48,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 03:01:48,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 03:01:48,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 03:01:48,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 03:01:48,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 03:01:48,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 03:01:48,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 03:01:48,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 03:01:48,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 03:01:48,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 03:01:48,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 03:01:48,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 03:01:48,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 03:01:48,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 03:01:48,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 03:01:48,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 03:01:48,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 03:01:48,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 03:01:48,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 03:01:48,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 03:01:49,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 03:01:49,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 03:01:49,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 03:01:49,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 03:01:49,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 03:01:49,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 03:01:49,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 03:01:49,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 03:01:49,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 03:01:49,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 03:01:49,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 03:01:49,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 03:01:49,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 03:01:49,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 03:01:49,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 03:01:49,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 03:01:49,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 03:01:49,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 03:01:49,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 03:01:49,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 03:01:49,016 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 03:01:49,040 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 03:01:49,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 03:01:49,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 03:01:49,041 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 03:01:49,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 03:01:49,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 03:01:49,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 03:01:49,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 03:01:49,043 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 03:01:49,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 03:01:49,043 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 03:01:49,043 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 03:01:49,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 03:01:49,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 03:01:49,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 03:01:49,044 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 03:01:49,044 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 03:01:49,044 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 03:01:49,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 03:01:49,045 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 03:01:49,045 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 03:01:49,045 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 03:01:49,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 03:01:49,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 03:01:49,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 03:01:49,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 03:01:49,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 03:01:49,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 03:01:49,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 03:01:49,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 03:01:49,046 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 03:01:49,047 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 03:01:49,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 03:01:49,047 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 03:01:49,047 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 [2023-02-17 03:01:49,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 03:01:49,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 03:01:49,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 03:01:49,258 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 03:01:49,258 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 03:01:49,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2023-02-17 03:01:50,217 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 03:01:50,346 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 03:01:50,347 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2023-02-17 03:01:50,351 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67c369153/c8248476da934f10bece9584eabccfcc/FLAGa3a9f071f [2023-02-17 03:01:50,360 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67c369153/c8248476da934f10bece9584eabccfcc [2023-02-17 03:01:50,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 03:01:50,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 03:01:50,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 03:01:50,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 03:01:50,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 03:01:50,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 03:01:50" (1/1) ... [2023-02-17 03:01:50,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51b29d6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:01:50, skipping insertion in model container [2023-02-17 03:01:50,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 03:01:50" (1/1) ... [2023-02-17 03:01:50,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 03:01:50,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 03:01:50,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 03:01:50,505 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 03:01:50,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 03:01:50,536 INFO L208 MainTranslator]: Completed translation [2023-02-17 03:01:50,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:01:50 WrapperNode [2023-02-17 03:01:50,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 03:01:50,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 03:01:50,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 03:01:50,538 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 03:01:50,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:01:50" (1/1) ... [2023-02-17 03:01:50,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:01:50" (1/1) ... [2023-02-17 03:01:50,568 INFO L138 Inliner]: procedures = 9, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2023-02-17 03:01:50,569 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 03:01:50,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 03:01:50,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 03:01:50,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 03:01:50,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:01:50" (1/1) ... [2023-02-17 03:01:50,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:01:50" (1/1) ... [2023-02-17 03:01:50,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:01:50" (1/1) ... [2023-02-17 03:01:50,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:01:50" (1/1) ... [2023-02-17 03:01:50,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:01:50" (1/1) ... [2023-02-17 03:01:50,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:01:50" (1/1) ... [2023-02-17 03:01:50,603 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:01:50" (1/1) ... [2023-02-17 03:01:50,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:01:50" (1/1) ... [2023-02-17 03:01:50,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 03:01:50,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 03:01:50,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 03:01:50,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 03:01:50,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:01:50" (1/1) ... [2023-02-17 03:01:50,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 03:01:50,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:01:50,646 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) [2023-02-17 03:01:50,666 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 [2023-02-17 03:01:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 03:01:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 03:01:50,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 03:01:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 03:01:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 03:01:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 03:01:50,734 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 03:01:50,737 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 03:01:50,901 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 03:01:50,906 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 03:01:50,906 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-17 03:01:50,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 03:01:50 BoogieIcfgContainer [2023-02-17 03:01:50,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 03:01:50,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 03:01:50,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 03:01:50,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 03:01:50,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 03:01:50" (1/3) ... [2023-02-17 03:01:50,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df551da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 03:01:50, skipping insertion in model container [2023-02-17 03:01:50,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:01:50" (2/3) ... [2023-02-17 03:01:50,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df551da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 03:01:50, skipping insertion in model container [2023-02-17 03:01:50,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 03:01:50" (3/3) ... [2023-02-17 03:01:50,913 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2.c [2023-02-17 03:01:50,938 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 03:01:50,939 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-02-17 03:01:50,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 03:01:50,994 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;@2e8c7a8c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 03:01:50,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-02-17 03:01:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:51,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-17 03:01:51,012 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:51,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-17 03:01:51,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:51,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:51,017 INFO L85 PathProgramCache]: Analyzing trace with hash 28698921, now seen corresponding path program 1 times [2023-02-17 03:01:51,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:51,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002864849] [2023-02-17 03:01:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:51,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:51,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:51,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002864849] [2023-02-17 03:01:51,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002864849] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:01:51,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:01:51,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:01:51,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105303842] [2023-02-17 03:01:51,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:01:51,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:01:51,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:01:51,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:01:51,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:01:51,298 INFO L87 Difference]: Start difference. First operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:51,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:01:51,403 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2023-02-17 03:01:51,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 03:01:51,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2023-02-17 03:01:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:01:51,412 INFO L225 Difference]: With dead ends: 69 [2023-02-17 03:01:51,412 INFO L226 Difference]: Without dead ends: 65 [2023-02-17 03:01:51,414 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 [2023-02-17 03:01:51,418 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 70 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:01:51,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 84 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:01:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-17 03:01:51,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2023-02-17 03:01:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-02-17 03:01:51,449 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 5 [2023-02-17 03:01:51,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:01:51,449 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-02-17 03:01:51,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:51,450 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-02-17 03:01:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 03:01:51,450 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:51,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:01:51,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 03:01:51,452 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:51,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:51,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1809811544, now seen corresponding path program 1 times [2023-02-17 03:01:51,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:51,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566968357] [2023-02-17 03:01:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:51,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:51,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:51,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566968357] [2023-02-17 03:01:51,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566968357] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:01:51,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:01:51,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 03:01:51,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835463910] [2023-02-17 03:01:51,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:01:51,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:01:51,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:01:51,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:01:51,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:01:51,584 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:51,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:01:51,655 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2023-02-17 03:01:51,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 03:01:51,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-17 03:01:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:01:51,657 INFO L225 Difference]: With dead ends: 70 [2023-02-17 03:01:51,657 INFO L226 Difference]: Without dead ends: 70 [2023-02-17 03:01:51,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 03:01:51,658 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 83 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:01:51,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:01:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-17 03:01:51,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2023-02-17 03:01:51,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:51,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2023-02-17 03:01:51,662 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 7 [2023-02-17 03:01:51,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:01:51,662 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2023-02-17 03:01:51,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:51,663 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2023-02-17 03:01:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 03:01:51,663 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:51,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:01:51,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 03:01:51,663 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:51,664 INFO L85 PathProgramCache]: Analyzing trace with hash -489510905, now seen corresponding path program 1 times [2023-02-17 03:01:51,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:51,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252733964] [2023-02-17 03:01:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:51,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:51,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:51,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252733964] [2023-02-17 03:01:51,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252733964] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:01:51,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:01:51,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 03:01:51,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297056309] [2023-02-17 03:01:51,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:01:51,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:01:51,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:01:51,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:01:51,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:01:51,726 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2023-02-17 03:01:51,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:01:51,760 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2023-02-17 03:01:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 03:01:51,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 [2023-02-17 03:01:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:01:51,761 INFO L225 Difference]: With dead ends: 75 [2023-02-17 03:01:51,762 INFO L226 Difference]: Without dead ends: 75 [2023-02-17 03:01:51,762 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 [2023-02-17 03:01:51,763 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 63 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:01:51,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 152 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:01:51,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-17 03:01:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2023-02-17 03:01:51,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2023-02-17 03:01:51,767 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 11 [2023-02-17 03:01:51,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:01:51,767 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2023-02-17 03:01:51,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2023-02-17 03:01:51,768 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2023-02-17 03:01:51,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 03:01:51,768 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:51,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:01:51,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 03:01:51,768 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:51,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:51,769 INFO L85 PathProgramCache]: Analyzing trace with hash -489508983, now seen corresponding path program 1 times [2023-02-17 03:01:51,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:51,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698018006] [2023-02-17 03:01:51,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:51,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:51,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:51,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698018006] [2023-02-17 03:01:51,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698018006] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:01:51,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:01:51,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 03:01:51,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041352525] [2023-02-17 03:01:51,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:01:51,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:01:51,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:01:51,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:01:51,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:01:51,875 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2023-02-17 03:01:51,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:01:51,913 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-02-17 03:01:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:01:51,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 [2023-02-17 03:01:51,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:01:51,914 INFO L225 Difference]: With dead ends: 43 [2023-02-17 03:01:51,914 INFO L226 Difference]: Without dead ends: 43 [2023-02-17 03:01:51,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:01:51,915 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:01:51,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:01:51,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-17 03:01:51,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-02-17 03:01:51,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.411764705882353) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-02-17 03:01:51,919 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 11 [2023-02-17 03:01:51,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:01:51,919 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-02-17 03:01:51,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2023-02-17 03:01:51,919 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-02-17 03:01:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 03:01:51,919 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:51,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:01:51,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 03:01:51,923 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:51,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash -489508982, now seen corresponding path program 1 times [2023-02-17 03:01:51,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:51,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283500537] [2023-02-17 03:01:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:51,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:52,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:52,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283500537] [2023-02-17 03:01:52,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283500537] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:01:52,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:01:52,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:01:52,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620095870] [2023-02-17 03:01:52,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:01:52,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:01:52,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:01:52,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:01:52,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:01:52,090 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2023-02-17 03:01:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:01:52,155 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2023-02-17 03:01:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:01:52,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 [2023-02-17 03:01:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:01:52,157 INFO L225 Difference]: With dead ends: 50 [2023-02-17 03:01:52,157 INFO L226 Difference]: Without dead ends: 50 [2023-02-17 03:01:52,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-02-17 03:01:52,168 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:01:52,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:01:52,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-17 03:01:52,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2023-02-17 03:01:52,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-02-17 03:01:52,171 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 11 [2023-02-17 03:01:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:01:52,172 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-02-17 03:01:52,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2023-02-17 03:01:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-02-17 03:01:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 03:01:52,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:52,172 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:01:52,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 03:01:52,172 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:52,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:52,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839934, now seen corresponding path program 1 times [2023-02-17 03:01:52,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:52,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691511302] [2023-02-17 03:01:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:52,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:52,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:52,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691511302] [2023-02-17 03:01:52,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691511302] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:01:52,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:01:52,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 03:01:52,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962996579] [2023-02-17 03:01:52,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:01:52,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:01:52,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:01:52,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:01:52,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:01:52,252 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:52,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:01:52,281 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2023-02-17 03:01:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:01:52,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-02-17 03:01:52,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:01:52,284 INFO L225 Difference]: With dead ends: 47 [2023-02-17 03:01:52,284 INFO L226 Difference]: Without dead ends: 47 [2023-02-17 03:01:52,284 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 [2023-02-17 03:01:52,286 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:01:52,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:01:52,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-17 03:01:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-02-17 03:01:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2023-02-17 03:01:52,299 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 16 [2023-02-17 03:01:52,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:01:52,300 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2023-02-17 03:01:52,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:52,300 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2023-02-17 03:01:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 03:01:52,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:52,300 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:01:52,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 03:01:52,301 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:52,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:52,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839933, now seen corresponding path program 1 times [2023-02-17 03:01:52,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:52,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692564596] [2023-02-17 03:01:52,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:52,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:52,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:52,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692564596] [2023-02-17 03:01:52,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692564596] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:01:52,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524354376] [2023-02-17 03:01:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:52,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:01:52,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:01:52,406 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) [2023-02-17 03:01:52,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 03:01:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:52,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 03:01:52,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:01:52,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:01:52,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-17 03:01:52,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:01:52,555 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 15 [2023-02-17 03:01:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:52,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:01:52,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2023-02-17 03:01:52,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:01:52,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 74 [2023-02-17 03:01:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:52,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524354376] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:01:52,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:01:52,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2023-02-17 03:01:52,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273306780] [2023-02-17 03:01:52,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:01:52,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 03:01:52,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:01:52,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 03:01:52,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-02-17 03:01:52,676 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:52,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:01:52,853 INFO L93 Difference]: Finished difference Result 147 states and 168 transitions. [2023-02-17 03:01:52,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 03:01:52,853 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 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 16 [2023-02-17 03:01:52,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:01:52,856 INFO L225 Difference]: With dead ends: 147 [2023-02-17 03:01:52,856 INFO L226 Difference]: Without dead ends: 147 [2023-02-17 03:01:52,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2023-02-17 03:01:52,857 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 355 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:01:52,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 75 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:01:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-17 03:01:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 56. [2023-02-17 03:01:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-02-17 03:01:52,869 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 16 [2023-02-17 03:01:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:01:52,869 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-02-17 03:01:52,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-02-17 03:01:52,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 03:01:52,871 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:52,871 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:01:52,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 03:01:53,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:01:53,077 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:53,078 INFO L85 PathProgramCache]: Analyzing trace with hash -411430410, now seen corresponding path program 1 times [2023-02-17 03:01:53,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:53,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095431201] [2023-02-17 03:01:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:53,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:01:53,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:53,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095431201] [2023-02-17 03:01:53,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095431201] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:01:53,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:01:53,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 03:01:53,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330573350] [2023-02-17 03:01:53,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:01:53,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 03:01:53,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:01:53,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 03:01:53,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:01:53,147 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:01:53,169 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2023-02-17 03:01:53,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:01:53,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-17 03:01:53,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:01:53,170 INFO L225 Difference]: With dead ends: 55 [2023-02-17 03:01:53,170 INFO L226 Difference]: Without dead ends: 55 [2023-02-17 03:01:53,170 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 [2023-02-17 03:01:53,171 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:01:53,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:01:53,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-17 03:01:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-02-17 03:01:53,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 48 states have (on average 1.3125) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:53,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2023-02-17 03:01:53,177 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 17 [2023-02-17 03:01:53,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:01:53,177 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2023-02-17 03:01:53,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2023-02-17 03:01:53,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 03:01:53,178 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:53,178 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:01:53,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 03:01:53,179 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:53,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:53,179 INFO L85 PathProgramCache]: Analyzing trace with hash -411430409, now seen corresponding path program 1 times [2023-02-17 03:01:53,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:53,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535777316] [2023-02-17 03:01:53,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:53,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:53,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:53,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535777316] [2023-02-17 03:01:53,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535777316] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:01:53,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649167562] [2023-02-17 03:01:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:53,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:01:53,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:01:53,304 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) [2023-02-17 03:01:53,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 03:01:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:53,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 03:01:53,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:01:53,391 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 6 treesize of output 5 [2023-02-17 03:01:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:53,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:01:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:53,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649167562] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:01:53,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:01:53,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-17 03:01:53,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152140295] [2023-02-17 03:01:53,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:01:53,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 03:01:53,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:01:53,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 03:01:53,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-17 03:01:53,434 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:53,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:01:53,553 INFO L93 Difference]: Finished difference Result 190 states and 222 transitions. [2023-02-17 03:01:53,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 03:01:53,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-17 03:01:53,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:01:53,555 INFO L225 Difference]: With dead ends: 190 [2023-02-17 03:01:53,555 INFO L226 Difference]: Without dead ends: 190 [2023-02-17 03:01:53,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2023-02-17 03:01:53,557 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 325 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:01:53,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 105 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:01:53,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-02-17 03:01:53,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 104. [2023-02-17 03:01:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 97 states have (on average 1.3711340206185567) internal successors, (133), 103 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2023-02-17 03:01:53,569 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 17 [2023-02-17 03:01:53,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:01:53,569 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2023-02-17 03:01:53,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:53,570 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2023-02-17 03:01:53,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 03:01:53,570 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:53,570 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:01:53,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 03:01:53,776 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,SelfDestructingSolverStorable8 [2023-02-17 03:01:53,776 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:53,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:53,777 INFO L85 PathProgramCache]: Analyzing trace with hash 130511665, now seen corresponding path program 1 times [2023-02-17 03:01:53,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:53,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215522355] [2023-02-17 03:01:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:53,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:01:53,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:53,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215522355] [2023-02-17 03:01:53,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215522355] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:01:53,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:01:53,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 03:01:53,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846265417] [2023-02-17 03:01:53,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:01:53,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:01:53,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:01:53,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:01:53,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:01:53,831 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:53,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:01:53,848 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2023-02-17 03:01:53,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:01:53,848 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), 0 states have call successors, (0), 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 18 [2023-02-17 03:01:53,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:01:53,849 INFO L225 Difference]: With dead ends: 103 [2023-02-17 03:01:53,849 INFO L226 Difference]: Without dead ends: 103 [2023-02-17 03:01:53,849 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 [2023-02-17 03:01:53,850 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:01:53,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 53 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:01:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-17 03:01:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-02-17 03:01:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 102 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2023-02-17 03:01:53,855 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 18 [2023-02-17 03:01:53,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:01:53,857 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2023-02-17 03:01:53,857 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:53,857 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2023-02-17 03:01:53,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 03:01:53,858 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:53,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:01:53,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 03:01:53,859 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:53,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:53,859 INFO L85 PathProgramCache]: Analyzing trace with hash 130511666, now seen corresponding path program 1 times [2023-02-17 03:01:53,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:53,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695044560] [2023-02-17 03:01:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:53,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:53,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:53,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695044560] [2023-02-17 03:01:53,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695044560] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:01:53,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538925324] [2023-02-17 03:01:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:53,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:01:53,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:01:53,915 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) [2023-02-17 03:01:53,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 03:01:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:53,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 03:01:53,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:01:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:53,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:01:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:53,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538925324] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:01:53,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:01:53,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-17 03:01:53,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659582179] [2023-02-17 03:01:53,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:01:53,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 03:01:53,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:01:53,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 03:01:53,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-17 03:01:53,996 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:54,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:01:54,050 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2023-02-17 03:01:54,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:01:54,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 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 18 [2023-02-17 03:01:54,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:01:54,052 INFO L225 Difference]: With dead ends: 111 [2023-02-17 03:01:54,053 INFO L226 Difference]: Without dead ends: 111 [2023-02-17 03:01:54,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-02-17 03:01:54,053 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:01:54,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 117 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:01:54,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-17 03:01:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2023-02-17 03:01:54,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.2989690721649485) internal successors, (126), 102 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2023-02-17 03:01:54,057 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 18 [2023-02-17 03:01:54,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:01:54,057 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2023-02-17 03:01:54,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:54,057 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2023-02-17 03:01:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 03:01:54,058 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:54,058 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:01:54,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 03:01:54,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:01:54,264 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:54,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:54,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1752050598, now seen corresponding path program 1 times [2023-02-17 03:01:54,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:54,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987514835] [2023-02-17 03:01:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:54,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:54,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:54,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987514835] [2023-02-17 03:01:54,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987514835] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:01:54,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350092528] [2023-02-17 03:01:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:54,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:01:54,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:01:54,356 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) [2023-02-17 03:01:54,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 03:01:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:54,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 03:01:54,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:01:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:54,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:01:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:54,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350092528] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:01:54,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:01:54,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-02-17 03:01:54,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158099872] [2023-02-17 03:01:54,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:01:54,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 03:01:54,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:01:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 03:01:54,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-17 03:01:54,461 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:01:54,535 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2023-02-17 03:01:54,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 03:01:54,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-17 03:01:54,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:01:54,536 INFO L225 Difference]: With dead ends: 111 [2023-02-17 03:01:54,536 INFO L226 Difference]: Without dead ends: 111 [2023-02-17 03:01:54,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2023-02-17 03:01:54,537 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 173 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:01:54,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 106 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:01:54,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-17 03:01:54,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2023-02-17 03:01:54,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 100 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:54,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2023-02-17 03:01:54,541 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 21 [2023-02-17 03:01:54,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:01:54,541 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2023-02-17 03:01:54,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:54,541 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2023-02-17 03:01:54,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 03:01:54,542 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:54,542 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] [2023-02-17 03:01:54,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 03:01:54,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:01:54,743 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:54,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:54,744 INFO L85 PathProgramCache]: Analyzing trace with hash -93493367, now seen corresponding path program 1 times [2023-02-17 03:01:54,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:54,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722594011] [2023-02-17 03:01:54,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:54,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:01:54,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:54,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722594011] [2023-02-17 03:01:54,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722594011] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:01:54,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272655108] [2023-02-17 03:01:54,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:54,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:01:54,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:01:54,816 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) [2023-02-17 03:01:54,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 03:01:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:54,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 03:01:54,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:01:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:01:54,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:01:54,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2023-02-17 03:01:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:01:54,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272655108] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:01:54,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:01:54,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-02-17 03:01:54,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979872420] [2023-02-17 03:01:54,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:01:54,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 03:01:54,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:01:54,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 03:01:54,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-17 03:01:54,917 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:55,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:01:55,006 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2023-02-17 03:01:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 03:01:55,007 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 23 [2023-02-17 03:01:55,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:01:55,008 INFO L225 Difference]: With dead ends: 140 [2023-02-17 03:01:55,008 INFO L226 Difference]: Without dead ends: 140 [2023-02-17 03:01:55,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-02-17 03:01:55,009 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 117 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:01:55,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 99 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:01:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-17 03:01:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 104. [2023-02-17 03:01:55,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.2653061224489797) internal successors, (124), 103 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:55,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2023-02-17 03:01:55,013 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 23 [2023-02-17 03:01:55,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:01:55,014 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2023-02-17 03:01:55,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:55,014 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2023-02-17 03:01:55,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 03:01:55,016 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:55,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:01:55,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 03:01:55,222 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,SelfDestructingSolverStorable12 [2023-02-17 03:01:55,222 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:55,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:55,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1409452358, now seen corresponding path program 1 times [2023-02-17 03:01:55,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:55,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712759527] [2023-02-17 03:01:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:55,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:01:55,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:55,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712759527] [2023-02-17 03:01:55,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712759527] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:01:55,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792347355] [2023-02-17 03:01:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:55,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:01:55,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:01:55,280 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) [2023-02-17 03:01:55,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 03:01:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:55,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 03:01:55,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:01:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:01:55,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:01:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:01:55,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792347355] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:01:55,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:01:55,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2023-02-17 03:01:55,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388814403] [2023-02-17 03:01:55,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:01:55,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 03:01:55,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:01:55,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 03:01:55,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-17 03:01:55,392 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:55,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:01:55,437 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2023-02-17 03:01:55,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 03:01:55,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-17 03:01:55,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:01:55,439 INFO L225 Difference]: With dead ends: 101 [2023-02-17 03:01:55,439 INFO L226 Difference]: Without dead ends: 101 [2023-02-17 03:01:55,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-02-17 03:01:55,440 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 102 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:01:55,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 82 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:01:55,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-17 03:01:55,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2023-02-17 03:01:55,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.2584269662921348) internal successors, (112), 94 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:55,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2023-02-17 03:01:55,442 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 27 [2023-02-17 03:01:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:01:55,442 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2023-02-17 03:01:55,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:55,443 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2023-02-17 03:01:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 03:01:55,445 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:55,445 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] [2023-02-17 03:01:55,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 03:01:55,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:01:55,651 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:55,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:55,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1360755252, now seen corresponding path program 1 times [2023-02-17 03:01:55,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:55,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748506707] [2023-02-17 03:01:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:55,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:01:55,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:55,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748506707] [2023-02-17 03:01:55,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748506707] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:01:55,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114230745] [2023-02-17 03:01:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:55,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:01:55,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:01:55,734 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) [2023-02-17 03:01:55,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 03:01:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:55,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 03:01:55,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:01:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:01:55,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:01:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:01:55,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114230745] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:01:55,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:01:55,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-17 03:01:55,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377823799] [2023-02-17 03:01:55,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:01:55,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 03:01:55,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:01:55,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 03:01:55,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-02-17 03:01:55,836 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:01:55,910 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2023-02-17 03:01:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 03:01:55,910 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-17 03:01:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:01:55,911 INFO L225 Difference]: With dead ends: 105 [2023-02-17 03:01:55,911 INFO L226 Difference]: Without dead ends: 105 [2023-02-17 03:01:55,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2023-02-17 03:01:55,912 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 180 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:01:55,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 180 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:01:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-17 03:01:55,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2023-02-17 03:01:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 93 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2023-02-17 03:01:55,914 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 27 [2023-02-17 03:01:55,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:01:55,914 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2023-02-17 03:01:55,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:01:55,914 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2023-02-17 03:01:55,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 03:01:55,914 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:01:55,914 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] [2023-02-17 03:01:55,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 03:01:56,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:01:56,121 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:01:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:01:56,121 INFO L85 PathProgramCache]: Analyzing trace with hash -144329733, now seen corresponding path program 1 times [2023-02-17 03:01:56,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:01:56,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435518317] [2023-02-17 03:01:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:56,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:01:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:01:56,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:01:56,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435518317] [2023-02-17 03:01:56,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435518317] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:01:56,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094845010] [2023-02-17 03:01:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:01:56,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:01:56,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:01:56,284 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) [2023-02-17 03:01:56,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 03:01:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:01:56,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-17 03:01:56,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:01:56,370 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 [2023-02-17 03:01:56,404 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 03:01:56,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:01:56,405 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 35 treesize of output 46 [2023-02-17 03:01:56,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:01:56,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 46 [2023-02-17 03:01:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:01:56,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:03,139 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 24 treesize of output 22 [2023-02-17 03:02:03,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2023-02-17 03:02:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:02:03,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094845010] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:03,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:03,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 15] total 32 [2023-02-17 03:02:03,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791252792] [2023-02-17 03:02:03,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:03,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 03:02:03,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:03,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 03:02:03,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=893, Unknown=2, NotChecked=0, Total=992 [2023-02-17 03:02:03,217 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:04,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:04,099 INFO L93 Difference]: Finished difference Result 157 states and 177 transitions. [2023-02-17 03:02:04,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-17 03:02:04,100 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-17 03:02:04,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:04,100 INFO L225 Difference]: With dead ends: 157 [2023-02-17 03:02:04,100 INFO L226 Difference]: Without dead ends: 157 [2023-02-17 03:02:04,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=610, Invalid=3678, Unknown=2, NotChecked=0, Total=4290 [2023-02-17 03:02:04,102 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 350 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:04,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 239 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 03:02:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-02-17 03:02:04,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 106. [2023-02-17 03:02:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.21) internal successors, (121), 105 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2023-02-17 03:02:04,104 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 31 [2023-02-17 03:02:04,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:04,104 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2023-02-17 03:02:04,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:04,105 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2023-02-17 03:02:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 03:02:04,105 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:04,105 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-17 03:02:04,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:04,308 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,SelfDestructingSolverStorable15 [2023-02-17 03:02:04,308 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:04,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:04,309 INFO L85 PathProgramCache]: Analyzing trace with hash 484636092, now seen corresponding path program 1 times [2023-02-17 03:02:04,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:04,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438652508] [2023-02-17 03:02:04,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:04,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 03:02:04,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:04,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438652508] [2023-02-17 03:02:04,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438652508] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:04,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854760582] [2023-02-17 03:02:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:04,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:04,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:04,386 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) [2023-02-17 03:02:04,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 03:02:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:04,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 03:02:04,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 03:02:04,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 03:02:04,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854760582] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:04,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:04,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2023-02-17 03:02:04,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800394206] [2023-02-17 03:02:04,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:04,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 03:02:04,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:04,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 03:02:04,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-17 03:02:04,490 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:04,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:04,722 INFO L93 Difference]: Finished difference Result 169 states and 184 transitions. [2023-02-17 03:02:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 03:02:04,723 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 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 37 [2023-02-17 03:02:04,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:04,723 INFO L225 Difference]: With dead ends: 169 [2023-02-17 03:02:04,723 INFO L226 Difference]: Without dead ends: 169 [2023-02-17 03:02:04,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2023-02-17 03:02:04,724 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 228 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:04,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 143 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:04,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-17 03:02:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 147. [2023-02-17 03:02:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.2253521126760563) internal successors, (174), 146 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2023-02-17 03:02:04,727 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 37 [2023-02-17 03:02:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:04,727 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2023-02-17 03:02:04,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2023-02-17 03:02:04,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 03:02:04,727 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:04,727 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:04,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:04,928 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,SelfDestructingSolverStorable16 [2023-02-17 03:02:04,928 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:04,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:04,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2032716941, now seen corresponding path program 1 times [2023-02-17 03:02:04,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:04,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430101312] [2023-02-17 03:02:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:04,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:02:05,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:05,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430101312] [2023-02-17 03:02:05,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430101312] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:05,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764022028] [2023-02-17 03:02:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:05,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:05,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:05,096 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) [2023-02-17 03:02:05,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 03:02:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:05,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 03:02:05,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:05,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:02:05,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-17 03:02:05,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:05,207 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 15 [2023-02-17 03:02:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 03:02:05,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:05,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2023-02-17 03:02:05,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:05,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 80 [2023-02-17 03:02:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 03:02:05,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764022028] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:05,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:05,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-02-17 03:02:05,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731103975] [2023-02-17 03:02:05,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:05,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 03:02:05,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:05,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 03:02:05,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-02-17 03:02:05,326 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:05,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:05,512 INFO L93 Difference]: Finished difference Result 242 states and 291 transitions. [2023-02-17 03:02:05,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 03:02:05,513 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-02-17 03:02:05,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:05,513 INFO L225 Difference]: With dead ends: 242 [2023-02-17 03:02:05,513 INFO L226 Difference]: Without dead ends: 242 [2023-02-17 03:02:05,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2023-02-17 03:02:05,514 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 285 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:05,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 177 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:05,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-02-17 03:02:05,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 162. [2023-02-17 03:02:05,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2356687898089171) internal successors, (194), 161 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:05,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 194 transitions. [2023-02-17 03:02:05,517 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 194 transitions. Word has length 41 [2023-02-17 03:02:05,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:05,517 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 194 transitions. [2023-02-17 03:02:05,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:05,517 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 194 transitions. [2023-02-17 03:02:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 03:02:05,518 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:05,518 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:05,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:05,718 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,SelfDestructingSolverStorable17 [2023-02-17 03:02:05,718 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:05,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:05,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1410284307, now seen corresponding path program 1 times [2023-02-17 03:02:05,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:05,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475734143] [2023-02-17 03:02:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:05,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 03:02:05,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:05,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475734143] [2023-02-17 03:02:05,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475734143] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:05,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813262146] [2023-02-17 03:02:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:05,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:05,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:05,828 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) [2023-02-17 03:02:05,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 03:02:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:05,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-17 03:02:05,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:05,930 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 10 treesize of output 9 [2023-02-17 03:02:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 03:02:05,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 03:02:06,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813262146] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:06,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:06,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-02-17 03:02:06,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114209362] [2023-02-17 03:02:06,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:06,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 03:02:06,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:06,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 03:02:06,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-02-17 03:02:06,033 INFO L87 Difference]: Start difference. First operand 162 states and 194 transitions. Second operand has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 16 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:06,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:06,476 INFO L93 Difference]: Finished difference Result 289 states and 326 transitions. [2023-02-17 03:02:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-17 03:02:06,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 16 states have internal predecessors, (92), 0 states have call successors, (0), 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 42 [2023-02-17 03:02:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:06,477 INFO L225 Difference]: With dead ends: 289 [2023-02-17 03:02:06,477 INFO L226 Difference]: Without dead ends: 289 [2023-02-17 03:02:06,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=879, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 03:02:06,478 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 504 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:06,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 331 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:02:06,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-02-17 03:02:06,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 183. [2023-02-17 03:02:06,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.2415730337078652) internal successors, (221), 182 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 221 transitions. [2023-02-17 03:02:06,482 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 221 transitions. Word has length 42 [2023-02-17 03:02:06,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:06,482 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 221 transitions. [2023-02-17 03:02:06,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 16 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 221 transitions. [2023-02-17 03:02:06,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 03:02:06,483 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:06,483 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:06,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:06,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:06,692 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:06,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:06,692 INFO L85 PathProgramCache]: Analyzing trace with hash 183114832, now seen corresponding path program 2 times [2023-02-17 03:02:06,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:06,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91746599] [2023-02-17 03:02:06,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:06,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 03:02:06,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:06,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91746599] [2023-02-17 03:02:06,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91746599] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:06,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668965804] [2023-02-17 03:02:06,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:02:06,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:06,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:06,783 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) [2023-02-17 03:02:06,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 03:02:06,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:02:06,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:06,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 03:02:06,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 03:02:06,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 03:02:06,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668965804] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:06,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:06,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-02-17 03:02:06,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912630549] [2023-02-17 03:02:06,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:06,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 03:02:06,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:06,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 03:02:06,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-02-17 03:02:06,905 INFO L87 Difference]: Start difference. First operand 183 states and 221 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:07,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:07,021 INFO L93 Difference]: Finished difference Result 187 states and 217 transitions. [2023-02-17 03:02:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 03:02:07,021 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 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 46 [2023-02-17 03:02:07,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:07,022 INFO L225 Difference]: With dead ends: 187 [2023-02-17 03:02:07,022 INFO L226 Difference]: Without dead ends: 187 [2023-02-17 03:02:07,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 80 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2023-02-17 03:02:07,023 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 196 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:07,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 202 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-02-17 03:02:07,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 171. [2023-02-17 03:02:07,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2108433734939759) internal successors, (201), 170 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 201 transitions. [2023-02-17 03:02:07,026 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 201 transitions. Word has length 46 [2023-02-17 03:02:07,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:07,026 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 201 transitions. [2023-02-17 03:02:07,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:07,026 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 201 transitions. [2023-02-17 03:02:07,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-17 03:02:07,027 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:07,027 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2023-02-17 03:02:07,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:07,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:07,232 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:07,233 INFO L85 PathProgramCache]: Analyzing trace with hash 457132991, now seen corresponding path program 2 times [2023-02-17 03:02:07,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:07,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907358409] [2023-02-17 03:02:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:07,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 03:02:07,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:07,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907358409] [2023-02-17 03:02:07,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907358409] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:07,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001526271] [2023-02-17 03:02:07,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:02:07,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:07,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:07,317 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) [2023-02-17 03:02:07,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 03:02:07,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:02:07,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:07,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 03:02:07,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 03:02:07,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 03:02:07,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001526271] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:07,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:07,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-17 03:02:07,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710321124] [2023-02-17 03:02:07,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:07,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 03:02:07,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 03:02:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-17 03:02:07,432 INFO L87 Difference]: Start difference. First operand 171 states and 201 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:07,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:07,515 INFO L93 Difference]: Finished difference Result 171 states and 194 transitions. [2023-02-17 03:02:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 03:02:07,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-17 03:02:07,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:07,517 INFO L225 Difference]: With dead ends: 171 [2023-02-17 03:02:07,517 INFO L226 Difference]: Without dead ends: 171 [2023-02-17 03:02:07,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-02-17 03:02:07,518 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 67 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:07,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 195 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:07,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-17 03:02:07,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2023-02-17 03:02:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.1847133757961783) internal successors, (186), 161 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 186 transitions. [2023-02-17 03:02:07,520 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 186 transitions. Word has length 47 [2023-02-17 03:02:07,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:07,521 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 186 transitions. [2023-02-17 03:02:07,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 186 transitions. [2023-02-17 03:02:07,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-17 03:02:07,521 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:07,521 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2023-02-17 03:02:07,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:07,727 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,SelfDestructingSolverStorable20 [2023-02-17 03:02:07,727 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:07,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:07,727 INFO L85 PathProgramCache]: Analyzing trace with hash -269976254, now seen corresponding path program 3 times [2023-02-17 03:02:07,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:07,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191376960] [2023-02-17 03:02:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:07,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:02:07,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:07,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191376960] [2023-02-17 03:02:07,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191376960] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:07,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513616582] [2023-02-17 03:02:07,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:02:07,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:07,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:07,924 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) [2023-02-17 03:02:07,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 03:02:07,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 03:02:07,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:07,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 03:02:07,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:08,002 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 6 treesize of output 5 [2023-02-17 03:02:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 03:02:08,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 03:02:08,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513616582] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:08,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:08,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2023-02-17 03:02:08,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308163977] [2023-02-17 03:02:08,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:08,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 03:02:08,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:08,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 03:02:08,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2023-02-17 03:02:08,188 INFO L87 Difference]: Start difference. First operand 162 states and 186 transitions. Second operand has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:08,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:08,568 INFO L93 Difference]: Finished difference Result 225 states and 258 transitions. [2023-02-17 03:02:08,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 03:02:08,569 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 states have internal predecessors, (105), 0 states have call successors, (0), 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 52 [2023-02-17 03:02:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:08,570 INFO L225 Difference]: With dead ends: 225 [2023-02-17 03:02:08,570 INFO L226 Difference]: Without dead ends: 225 [2023-02-17 03:02:08,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2023-02-17 03:02:08,571 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 350 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:08,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 187 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:02:08,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-02-17 03:02:08,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 157. [2023-02-17 03:02:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 153 states have (on average 1.1633986928104576) internal successors, (178), 156 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 178 transitions. [2023-02-17 03:02:08,574 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 178 transitions. Word has length 52 [2023-02-17 03:02:08,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:08,574 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 178 transitions. [2023-02-17 03:02:08,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:08,575 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 178 transitions. [2023-02-17 03:02:08,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-17 03:02:08,575 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:08,575 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-02-17 03:02:08,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:08,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:08,781 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:08,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1642790799, now seen corresponding path program 2 times [2023-02-17 03:02:08,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:08,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254052446] [2023-02-17 03:02:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:08,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 03:02:08,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:08,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254052446] [2023-02-17 03:02:08,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254052446] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:08,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793145101] [2023-02-17 03:02:08,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:02:08,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:08,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:08,866 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) [2023-02-17 03:02:08,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 03:02:08,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:02:08,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 03:02:08,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 03:02:08,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 03:02:08,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793145101] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:08,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:08,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-02-17 03:02:08,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196272769] [2023-02-17 03:02:08,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:08,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 03:02:08,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:08,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 03:02:08,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-02-17 03:02:08,992 INFO L87 Difference]: Start difference. First operand 157 states and 178 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:09,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:09,081 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2023-02-17 03:02:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 03:02:09,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-17 03:02:09,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:09,082 INFO L225 Difference]: With dead ends: 185 [2023-02-17 03:02:09,082 INFO L226 Difference]: Without dead ends: 185 [2023-02-17 03:02:09,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-02-17 03:02:09,083 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 75 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:09,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 233 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-17 03:02:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2023-02-17 03:02:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.1479289940828403) internal successors, (194), 172 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 194 transitions. [2023-02-17 03:02:09,085 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 194 transitions. Word has length 56 [2023-02-17 03:02:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:09,085 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 194 transitions. [2023-02-17 03:02:09,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 194 transitions. [2023-02-17 03:02:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-17 03:02:09,086 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:09,086 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-02-17 03:02:09,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:09,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:09,292 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:09,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:09,293 INFO L85 PathProgramCache]: Analyzing trace with hash 74449076, now seen corresponding path program 3 times [2023-02-17 03:02:09,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:09,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26373454] [2023-02-17 03:02:09,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:09,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 03:02:09,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:09,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26373454] [2023-02-17 03:02:09,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26373454] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:09,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937881509] [2023-02-17 03:02:09,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:02:09,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:09,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:09,601 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) [2023-02-17 03:02:09,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 03:02:09,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 03:02:09,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:09,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-17 03:02:09,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:09,723 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 6 treesize of output 5 [2023-02-17 03:02:09,725 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 6 treesize of output 5 [2023-02-17 03:02:09,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:02:09,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:02:09,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:09,740 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 15 [2023-02-17 03:02:09,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:09,768 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 15 [2023-02-17 03:02:09,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:02:09,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:09,828 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 15 [2023-02-17 03:02:09,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:02:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 03:02:09,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:09,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:09,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 74 [2023-02-17 03:02:10,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:10,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 74 [2023-02-17 03:02:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 03:02:10,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937881509] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:10,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:10,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 28 [2023-02-17 03:02:10,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347716793] [2023-02-17 03:02:10,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:10,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-17 03:02:10,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:10,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-17 03:02:10,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2023-02-17 03:02:10,890 INFO L87 Difference]: Start difference. First operand 173 states and 194 transitions. Second operand has 29 states, 28 states have (on average 5.607142857142857) internal successors, (157), 29 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:11,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:11,631 INFO L93 Difference]: Finished difference Result 201 states and 218 transitions. [2023-02-17 03:02:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 03:02:11,632 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.607142857142857) internal successors, (157), 29 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-02-17 03:02:11,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:11,633 INFO L225 Difference]: With dead ends: 201 [2023-02-17 03:02:11,633 INFO L226 Difference]: Without dead ends: 201 [2023-02-17 03:02:11,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2023-02-17 03:02:11,634 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 355 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:11,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 324 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 03:02:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-02-17 03:02:11,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 193. [2023-02-17 03:02:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 189 states have (on average 1.1428571428571428) internal successors, (216), 192 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 216 transitions. [2023-02-17 03:02:11,636 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 216 transitions. Word has length 60 [2023-02-17 03:02:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:11,636 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 216 transitions. [2023-02-17 03:02:11,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.607142857142857) internal successors, (157), 29 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 216 transitions. [2023-02-17 03:02:11,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-17 03:02:11,637 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:11,637 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2023-02-17 03:02:11,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:11,845 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,SelfDestructingSolverStorable23 [2023-02-17 03:02:11,845 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:11,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:11,845 INFO L85 PathProgramCache]: Analyzing trace with hash -809246151, now seen corresponding path program 1 times [2023-02-17 03:02:11,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:11,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979488919] [2023-02-17 03:02:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:11,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 33 proven. 92 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 03:02:12,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:12,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979488919] [2023-02-17 03:02:12,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979488919] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:12,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280278042] [2023-02-17 03:02:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:12,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:12,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:12,074 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) [2023-02-17 03:02:12,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 03:02:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:12,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-17 03:02:12,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:02:12,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2023-02-17 03:02:12,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:12,205 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 15 [2023-02-17 03:02:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 03:02:12,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:12,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2023-02-17 03:02:12,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:12,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 86 [2023-02-17 03:02:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 03:02:12,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280278042] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:12,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:12,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-02-17 03:02:12,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216679367] [2023-02-17 03:02:12,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:12,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 03:02:12,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:12,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 03:02:12,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-02-17 03:02:12,348 INFO L87 Difference]: Start difference. First operand 193 states and 216 transitions. Second operand has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:12,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:12,646 INFO L93 Difference]: Finished difference Result 302 states and 340 transitions. [2023-02-17 03:02:12,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 03:02:12,647 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 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 75 [2023-02-17 03:02:12,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:12,647 INFO L225 Difference]: With dead ends: 302 [2023-02-17 03:02:12,648 INFO L226 Difference]: Without dead ends: 302 [2023-02-17 03:02:12,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=1109, Unknown=0, NotChecked=0, Total=1406 [2023-02-17 03:02:12,648 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 276 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:12,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 335 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:02:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-02-17 03:02:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 210. [2023-02-17 03:02:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 206 states have (on average 1.1553398058252426) internal successors, (238), 209 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:12,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 238 transitions. [2023-02-17 03:02:12,652 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 238 transitions. Word has length 75 [2023-02-17 03:02:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:12,652 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 238 transitions. [2023-02-17 03:02:12,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 238 transitions. [2023-02-17 03:02:12,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-17 03:02:12,653 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:12,653 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2023-02-17 03:02:12,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:12,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:12,869 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:12,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:12,869 INFO L85 PathProgramCache]: Analyzing trace with hash 683173057, now seen corresponding path program 1 times [2023-02-17 03:02:12,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:12,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631690383] [2023-02-17 03:02:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:12,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 03:02:13,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:13,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631690383] [2023-02-17 03:02:13,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631690383] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:13,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754466016] [2023-02-17 03:02:13,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:13,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:13,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:13,083 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:13,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 03:02:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:13,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-17 03:02:13,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:13,208 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 10 treesize of output 9 [2023-02-17 03:02:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 03:02:13,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 03:02:13,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754466016] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:13,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:13,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 20 [2023-02-17 03:02:13,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483195950] [2023-02-17 03:02:13,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:13,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 03:02:13,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:13,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 03:02:13,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-02-17 03:02:13,402 INFO L87 Difference]: Start difference. First operand 210 states and 238 transitions. Second operand has 21 states, 20 states have (on average 7.35) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:14,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:14,446 INFO L93 Difference]: Finished difference Result 431 states and 481 transitions. [2023-02-17 03:02:14,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-17 03:02:14,447 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 7.35) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-02-17 03:02:14,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:14,449 INFO L225 Difference]: With dead ends: 431 [2023-02-17 03:02:14,449 INFO L226 Difference]: Without dead ends: 431 [2023-02-17 03:02:14,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=517, Invalid=2239, Unknown=0, NotChecked=0, Total=2756 [2023-02-17 03:02:14,451 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 750 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:14,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 496 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 03:02:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-02-17 03:02:14,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 280. [2023-02-17 03:02:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 276 states have (on average 1.184782608695652) internal successors, (327), 279 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 327 transitions. [2023-02-17 03:02:14,461 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 327 transitions. Word has length 76 [2023-02-17 03:02:14,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:14,461 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 327 transitions. [2023-02-17 03:02:14,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 7.35) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 327 transitions. [2023-02-17 03:02:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-17 03:02:14,462 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:14,462 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2023-02-17 03:02:14,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:14,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:14,668 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:14,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:14,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1737117148, now seen corresponding path program 2 times [2023-02-17 03:02:14,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:14,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906897020] [2023-02-17 03:02:14,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:14,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 13 proven. 137 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 03:02:14,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:14,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906897020] [2023-02-17 03:02:14,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906897020] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:14,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241613063] [2023-02-17 03:02:14,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:02:14,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:14,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:14,773 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:14,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 03:02:14,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:02:14,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:14,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 03:02:14,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 03:02:14,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 03:02:14,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241613063] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:14,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:14,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-02-17 03:02:14,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908968374] [2023-02-17 03:02:14,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:14,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 03:02:14,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:14,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 03:02:14,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-02-17 03:02:14,957 INFO L87 Difference]: Start difference. First operand 280 states and 327 transitions. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:15,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:15,118 INFO L93 Difference]: Finished difference Result 281 states and 320 transitions. [2023-02-17 03:02:15,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 03:02:15,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 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 80 [2023-02-17 03:02:15,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:15,119 INFO L225 Difference]: With dead ends: 281 [2023-02-17 03:02:15,119 INFO L226 Difference]: Without dead ends: 281 [2023-02-17 03:02:15,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 144 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2023-02-17 03:02:15,120 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 334 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:15,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 226 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:15,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-02-17 03:02:15,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 263. [2023-02-17 03:02:15,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.1583011583011582) internal successors, (300), 262 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 300 transitions. [2023-02-17 03:02:15,124 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 300 transitions. Word has length 80 [2023-02-17 03:02:15,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:15,124 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 300 transitions. [2023-02-17 03:02:15,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:15,124 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 300 transitions. [2023-02-17 03:02:15,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-17 03:02:15,124 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:15,124 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1] [2023-02-17 03:02:15,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:15,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:15,325 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:15,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1306836429, now seen corresponding path program 3 times [2023-02-17 03:02:15,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:15,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607863049] [2023-02-17 03:02:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:15,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 202 proven. 78 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 03:02:15,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:15,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607863049] [2023-02-17 03:02:15,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607863049] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:15,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105675644] [2023-02-17 03:02:15,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:02:15,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:15,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:15,470 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:15,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-17 03:02:15,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 03:02:15,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:15,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 03:02:15,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:15,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:02:15,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-17 03:02:15,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:15,586 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 15 [2023-02-17 03:02:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 120 proven. 3 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-02-17 03:02:15,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 111 proven. 12 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-02-17 03:02:15,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105675644] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:15,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:15,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-02-17 03:02:15,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714462651] [2023-02-17 03:02:15,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:15,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 03:02:15,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:15,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 03:02:15,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-02-17 03:02:15,731 INFO L87 Difference]: Start difference. First operand 263 states and 300 transitions. Second operand has 21 states, 21 states have (on average 6.523809523809524) internal successors, (137), 21 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:16,109 INFO L93 Difference]: Finished difference Result 264 states and 290 transitions. [2023-02-17 03:02:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-17 03:02:16,110 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.523809523809524) internal successors, (137), 21 states have internal predecessors, (137), 0 states have call successors, (0), 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 109 [2023-02-17 03:02:16,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:16,110 INFO L225 Difference]: With dead ends: 264 [2023-02-17 03:02:16,111 INFO L226 Difference]: Without dead ends: 264 [2023-02-17 03:02:16,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=432, Invalid=1548, Unknown=0, NotChecked=0, Total=1980 [2023-02-17 03:02:16,112 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 203 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:16,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 274 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:02:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-02-17 03:02:16,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 261. [2023-02-17 03:02:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 258 states have (on average 1.12015503875969) internal successors, (289), 260 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 289 transitions. [2023-02-17 03:02:16,116 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 289 transitions. Word has length 109 [2023-02-17 03:02:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:16,116 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 289 transitions. [2023-02-17 03:02:16,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.523809523809524) internal successors, (137), 21 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:16,116 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 289 transitions. [2023-02-17 03:02:16,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-17 03:02:16,118 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:16,119 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1] [2023-02-17 03:02:16,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:16,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-17 03:02:16,325 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:16,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:16,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1962904546, now seen corresponding path program 2 times [2023-02-17 03:02:16,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:16,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369986758] [2023-02-17 03:02:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:16,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 186 proven. 134 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-17 03:02:16,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:16,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369986758] [2023-02-17 03:02:16,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369986758] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:16,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566250031] [2023-02-17 03:02:16,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:02:16,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:16,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:16,500 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:16,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-17 03:02:16,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-17 03:02:16,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:16,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 03:02:16,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:16,617 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 6 treesize of output 5 [2023-02-17 03:02:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2023-02-17 03:02:16,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2023-02-17 03:02:17,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566250031] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:17,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:17,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 18 [2023-02-17 03:02:17,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392068318] [2023-02-17 03:02:17,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:17,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 03:02:17,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:17,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 03:02:17,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-17 03:02:17,130 INFO L87 Difference]: Start difference. First operand 261 states and 289 transitions. Second operand has 18 states, 18 states have (on average 8.11111111111111) internal successors, (146), 18 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:17,520 INFO L93 Difference]: Finished difference Result 295 states and 315 transitions. [2023-02-17 03:02:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 03:02:17,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.11111111111111) internal successors, (146), 18 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-02-17 03:02:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:17,521 INFO L225 Difference]: With dead ends: 295 [2023-02-17 03:02:17,521 INFO L226 Difference]: Without dead ends: 295 [2023-02-17 03:02:17,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2023-02-17 03:02:17,522 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 119 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:17,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 255 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:02:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-02-17 03:02:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 220. [2023-02-17 03:02:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 218 states have (on average 1.073394495412844) internal successors, (234), 219 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:17,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 234 transitions. [2023-02-17 03:02:17,533 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 234 transitions. Word has length 115 [2023-02-17 03:02:17,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:17,533 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 234 transitions. [2023-02-17 03:02:17,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.11111111111111) internal successors, (146), 18 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:17,533 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 234 transitions. [2023-02-17 03:02:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-17 03:02:17,534 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:17,534 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:17,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:17,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-17 03:02:17,740 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:17,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:17,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1985613403, now seen corresponding path program 1 times [2023-02-17 03:02:17,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:17,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191295114] [2023-02-17 03:02:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:17,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 539 proven. 87 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2023-02-17 03:02:17,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:17,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191295114] [2023-02-17 03:02:17,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191295114] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:17,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134304510] [2023-02-17 03:02:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:17,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:17,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:17,962 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:17,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-17 03:02:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:18,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 03:02:18,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 631 proven. 130 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-17 03:02:18,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 631 proven. 130 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-17 03:02:18,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134304510] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:18,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:18,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-02-17 03:02:18,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845219990] [2023-02-17 03:02:18,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:18,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 03:02:18,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:18,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 03:02:18,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-02-17 03:02:18,277 INFO L87 Difference]: Start difference. First operand 220 states and 234 transitions. Second operand has 19 states, 19 states have (on average 9.157894736842104) internal successors, (174), 19 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:18,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:18,548 INFO L93 Difference]: Finished difference Result 247 states and 261 transitions. [2023-02-17 03:02:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 03:02:18,548 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 9.157894736842104) internal successors, (174), 19 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2023-02-17 03:02:18,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:18,549 INFO L225 Difference]: With dead ends: 247 [2023-02-17 03:02:18,549 INFO L226 Difference]: Without dead ends: 247 [2023-02-17 03:02:18,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 349 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 03:02:18,550 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 110 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:18,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 396 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:02:18,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-02-17 03:02:18,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 235. [2023-02-17 03:02:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 233 states have (on average 1.0686695278969958) internal successors, (249), 234 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:18,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 249 transitions. [2023-02-17 03:02:18,553 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 249 transitions. Word has length 183 [2023-02-17 03:02:18,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:18,553 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 249 transitions. [2023-02-17 03:02:18,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.157894736842104) internal successors, (174), 19 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:18,553 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 249 transitions. [2023-02-17 03:02:18,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-02-17 03:02:18,554 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:18,554 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:18,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:18,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:18,760 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:18,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:18,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1035428845, now seen corresponding path program 2 times [2023-02-17 03:02:18,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:18,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835602069] [2023-02-17 03:02:18,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:18,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 602 proven. 305 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-02-17 03:02:19,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:19,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835602069] [2023-02-17 03:02:19,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835602069] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:19,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863795946] [2023-02-17 03:02:19,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:02:19,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:19,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:19,025 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:19,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-17 03:02:19,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:02:19,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:19,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 03:02:19,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 648 proven. 259 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-02-17 03:02:19,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 648 proven. 259 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-02-17 03:02:19,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863795946] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:19,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:19,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2023-02-17 03:02:19,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820048804] [2023-02-17 03:02:19,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:19,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 03:02:19,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:19,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 03:02:19,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2023-02-17 03:02:19,335 INFO L87 Difference]: Start difference. First operand 235 states and 249 transitions. Second operand has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:19,541 INFO L93 Difference]: Finished difference Result 256 states and 270 transitions. [2023-02-17 03:02:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 03:02:19,569 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2023-02-17 03:02:19,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:19,570 INFO L225 Difference]: With dead ends: 256 [2023-02-17 03:02:19,570 INFO L226 Difference]: Without dead ends: 256 [2023-02-17 03:02:19,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 367 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2023-02-17 03:02:19,570 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 91 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:19,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 523 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:02:19,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-02-17 03:02:19,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 247. [2023-02-17 03:02:19,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 245 states have (on average 1.0653061224489795) internal successors, (261), 246 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 261 transitions. [2023-02-17 03:02:19,573 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 261 transitions. Word has length 193 [2023-02-17 03:02:19,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:19,573 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 261 transitions. [2023-02-17 03:02:19,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:19,574 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 261 transitions. [2023-02-17 03:02:19,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-02-17 03:02:19,574 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:19,575 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:19,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:19,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:19,775 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:19,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1941601421, now seen corresponding path program 3 times [2023-02-17 03:02:19,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:19,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960761574] [2023-02-17 03:02:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:19,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 686 proven. 334 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-02-17 03:02:20,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:20,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960761574] [2023-02-17 03:02:20,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960761574] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:20,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85094270] [2023-02-17 03:02:20,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:02:20,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:20,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:20,050 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:20,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-17 03:02:20,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-17 03:02:20,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:20,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 03:02:20,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 476 proven. 34 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2023-02-17 03:02:20,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 476 proven. 34 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2023-02-17 03:02:20,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85094270] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:20,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:20,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2023-02-17 03:02:20,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033926783] [2023-02-17 03:02:20,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:20,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 03:02:20,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:20,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 03:02:20,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2023-02-17 03:02:20,403 INFO L87 Difference]: Start difference. First operand 247 states and 261 transitions. Second operand has 27 states, 27 states have (on average 8.481481481481481) internal successors, (229), 27 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:21,134 INFO L93 Difference]: Finished difference Result 434 states and 462 transitions. [2023-02-17 03:02:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-17 03:02:21,135 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 8.481481481481481) internal successors, (229), 27 states have internal predecessors, (229), 0 states have call successors, (0), 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 201 [2023-02-17 03:02:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:21,136 INFO L225 Difference]: With dead ends: 434 [2023-02-17 03:02:21,136 INFO L226 Difference]: Without dead ends: 434 [2023-02-17 03:02:21,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1561, Invalid=4919, Unknown=0, NotChecked=0, Total=6480 [2023-02-17 03:02:21,138 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 566 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:21,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 484 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 03:02:21,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-02-17 03:02:21,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 417. [2023-02-17 03:02:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 415 states have (on average 1.074698795180723) internal successors, (446), 416 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:21,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 446 transitions. [2023-02-17 03:02:21,144 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 446 transitions. Word has length 201 [2023-02-17 03:02:21,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:21,144 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 446 transitions. [2023-02-17 03:02:21,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 8.481481481481481) internal successors, (229), 27 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:21,144 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 446 transitions. [2023-02-17 03:02:21,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-02-17 03:02:21,146 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:21,146 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 18, 18, 18, 18, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 2, 1, 1, 1] [2023-02-17 03:02:21,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:21,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:21,353 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:21,353 INFO L85 PathProgramCache]: Analyzing trace with hash 315042624, now seen corresponding path program 4 times [2023-02-17 03:02:21,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:21,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113457684] [2023-02-17 03:02:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:21,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 1211 proven. 583 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-02-17 03:02:21,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:21,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113457684] [2023-02-17 03:02:21,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113457684] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:21,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624493521] [2023-02-17 03:02:21,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 03:02:21,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:21,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:21,721 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:21,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-17 03:02:24,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 03:02:24,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:24,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 03:02:24,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 1290 proven. 49 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2023-02-17 03:02:24,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 1290 proven. 49 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2023-02-17 03:02:24,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624493521] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:24,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:24,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2023-02-17 03:02:24,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124468265] [2023-02-17 03:02:24,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:25,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-17 03:02:25,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:25,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-17 03:02:25,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2023-02-17 03:02:25,009 INFO L87 Difference]: Start difference. First operand 417 states and 446 transitions. Second operand has 29 states, 29 states have (on average 7.551724137931035) internal successors, (219), 29 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:25,738 INFO L93 Difference]: Finished difference Result 452 states and 481 transitions. [2023-02-17 03:02:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-17 03:02:25,739 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 7.551724137931035) internal successors, (219), 29 states have internal predecessors, (219), 0 states have call successors, (0), 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 249 [2023-02-17 03:02:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:25,740 INFO L225 Difference]: With dead ends: 452 [2023-02-17 03:02:25,740 INFO L226 Difference]: Without dead ends: 452 [2023-02-17 03:02:25,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 477 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1131, Invalid=3425, Unknown=0, NotChecked=0, Total=4556 [2023-02-17 03:02:25,742 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 196 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:25,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 572 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 03:02:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2023-02-17 03:02:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 437. [2023-02-17 03:02:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 435 states have (on average 1.071264367816092) internal successors, (466), 436 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 466 transitions. [2023-02-17 03:02:25,746 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 466 transitions. Word has length 249 [2023-02-17 03:02:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:25,746 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 466 transitions. [2023-02-17 03:02:25,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.551724137931035) internal successors, (219), 29 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 466 transitions. [2023-02-17 03:02:25,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-02-17 03:02:25,748 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:25,748 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 2, 1, 1, 1] [2023-02-17 03:02:25,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-02-17 03:02:25,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-17 03:02:25,960 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:25,960 INFO L85 PathProgramCache]: Analyzing trace with hash 464852166, now seen corresponding path program 5 times [2023-02-17 03:02:25,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:25,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87863007] [2023-02-17 03:02:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:25,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1387 proven. 567 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-02-17 03:02:26,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:26,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87863007] [2023-02-17 03:02:26,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87863007] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:26,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619033232] [2023-02-17 03:02:26,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 03:02:26,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:26,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:26,313 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:26,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-17 03:02:32,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-17 03:02:32,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:32,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 03:02:32,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1460 proven. 494 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-02-17 03:02:32,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1479 proven. 475 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-02-17 03:02:32,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619033232] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:32,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:32,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 24 [2023-02-17 03:02:32,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661885461] [2023-02-17 03:02:32,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:32,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 03:02:32,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:32,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 03:02:32,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2023-02-17 03:02:32,346 INFO L87 Difference]: Start difference. First operand 437 states and 466 transitions. Second operand has 24 states, 24 states have (on average 8.333333333333334) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:32,801 INFO L93 Difference]: Finished difference Result 448 states and 476 transitions. [2023-02-17 03:02:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 03:02:32,802 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 8.333333333333334) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 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 257 [2023-02-17 03:02:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:32,803 INFO L225 Difference]: With dead ends: 448 [2023-02-17 03:02:32,803 INFO L226 Difference]: Without dead ends: 448 [2023-02-17 03:02:32,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 500 SyntacticMatches, 17 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=742, Invalid=2014, Unknown=0, NotChecked=0, Total=2756 [2023-02-17 03:02:32,806 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 115 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:32,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 444 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:02:32,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-02-17 03:02:32,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 442. [2023-02-17 03:02:32,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 440 states have (on average 1.0681818181818181) internal successors, (470), 441 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:32,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 470 transitions. [2023-02-17 03:02:32,810 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 470 transitions. Word has length 257 [2023-02-17 03:02:32,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:32,811 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 470 transitions. [2023-02-17 03:02:32,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.333333333333334) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:32,811 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 470 transitions. [2023-02-17 03:02:32,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-02-17 03:02:32,814 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:32,814 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 2, 1, 1, 1] [2023-02-17 03:02:32,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-17 03:02:33,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-02-17 03:02:33,026 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:33,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:33,027 INFO L85 PathProgramCache]: Analyzing trace with hash -948471375, now seen corresponding path program 6 times [2023-02-17 03:02:33,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:33,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772710479] [2023-02-17 03:02:33,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:33,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 1030 proven. 995 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2023-02-17 03:02:33,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:33,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772710479] [2023-02-17 03:02:33,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772710479] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:33,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884608406] [2023-02-17 03:02:33,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 03:02:33,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:33,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:33,431 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:33,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-17 03:02:34,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-02-17 03:02:34,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:02:34,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1146 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-17 03:02:34,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 1239 proven. 641 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2023-02-17 03:02:34,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 1313 proven. 567 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2023-02-17 03:02:35,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884608406] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:35,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:35,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 41 [2023-02-17 03:02:35,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27722998] [2023-02-17 03:02:35,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:35,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-17 03:02:35,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:35,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-17 03:02:35,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 03:02:35,040 INFO L87 Difference]: Start difference. First operand 442 states and 470 transitions. Second operand has 41 states, 41 states have (on average 6.463414634146342) internal successors, (265), 41 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:36,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:36,239 INFO L93 Difference]: Finished difference Result 459 states and 487 transitions. [2023-02-17 03:02:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-17 03:02:36,240 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.463414634146342) internal successors, (265), 41 states have internal predecessors, (265), 0 states have call successors, (0), 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 262 [2023-02-17 03:02:36,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:36,241 INFO L225 Difference]: With dead ends: 459 [2023-02-17 03:02:36,241 INFO L226 Difference]: Without dead ends: 459 [2023-02-17 03:02:36,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 494 SyntacticMatches, 6 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1720, Invalid=6470, Unknown=0, NotChecked=0, Total=8190 [2023-02-17 03:02:36,243 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 327 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:36,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 673 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 03:02:36,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-02-17 03:02:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 450. [2023-02-17 03:02:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 448 states have (on average 1.0669642857142858) internal successors, (478), 449 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 478 transitions. [2023-02-17 03:02:36,248 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 478 transitions. Word has length 262 [2023-02-17 03:02:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:36,248 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 478 transitions. [2023-02-17 03:02:36,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.463414634146342) internal successors, (265), 41 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:36,248 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 478 transitions. [2023-02-17 03:02:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-02-17 03:02:36,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:36,250 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 2, 1, 1, 1] [2023-02-17 03:02:36,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-02-17 03:02:36,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-17 03:02:36,460 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:36,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:36,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1500764660, now seen corresponding path program 7 times [2023-02-17 03:02:36,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:36,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993695067] [2023-02-17 03:02:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:36,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 0 proven. 2112 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2023-02-17 03:02:38,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:38,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993695067] [2023-02-17 03:02:38,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993695067] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:38,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205658353] [2023-02-17 03:02:38,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 03:02:38,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:38,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:38,129 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:38,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-17 03:02:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:38,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-17 03:02:38,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:02:38,384 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 6 treesize of output 5 [2023-02-17 03:02:38,386 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 6 treesize of output 5 [2023-02-17 03:02:38,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:02:38,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:02:38,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:38,411 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 15 [2023-02-17 03:02:38,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:38,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2023-02-17 03:02:38,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:38,461 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 15 [2023-02-17 03:02:38,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:38,540 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 15 [2023-02-17 03:02:38,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:02:38,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:38,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2023-02-17 03:02:38,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:38,636 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 15 [2023-02-17 03:02:38,727 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:38,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2023-02-17 03:02:38,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:38,730 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 15 [2023-02-17 03:02:38,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:38,833 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 15 [2023-02-17 03:02:38,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:02:38,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:38,941 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 15 [2023-02-17 03:02:38,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-17 03:02:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 0 proven. 2046 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2023-02-17 03:02:39,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:02:39,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:39,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2023-02-17 03:02:39,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:39,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2023-02-17 03:02:39,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:39,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 73 [2023-02-17 03:02:39,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:39,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 77 [2023-02-17 03:02:40,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:40,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 81 [2023-02-17 03:02:40,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:02:40,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 85 [2023-02-17 03:02:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 0 proven. 2046 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2023-02-17 03:02:40,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205658353] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:02:40,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:02:40,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21, 15] total 62 [2023-02-17 03:02:40,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844067123] [2023-02-17 03:02:40,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:02:40,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-17 03:02:40,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:02:40,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-17 03:02:40,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=3459, Unknown=0, NotChecked=0, Total=3906 [2023-02-17 03:02:40,909 INFO L87 Difference]: Start difference. First operand 450 states and 478 transitions. Second operand has 63 states, 62 states have (on average 6.629032258064516) internal successors, (411), 63 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:44,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:02:44,700 INFO L93 Difference]: Finished difference Result 1408 states and 1515 transitions. [2023-02-17 03:02:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 03:02:44,701 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 6.629032258064516) internal successors, (411), 63 states have internal predecessors, (411), 0 states have call successors, (0), 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 266 [2023-02-17 03:02:44,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:02:44,704 INFO L225 Difference]: With dead ends: 1408 [2023-02-17 03:02:44,704 INFO L226 Difference]: Without dead ends: 1408 [2023-02-17 03:02:44,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 495 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1395, Invalid=6795, Unknown=0, NotChecked=0, Total=8190 [2023-02-17 03:02:44,705 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1332 mSDsluCounter, 2242 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1332 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-17 03:02:44,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1332 Valid, 2328 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-17 03:02:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2023-02-17 03:02:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1399. [2023-02-17 03:02:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1397 states have (on average 1.0780243378668575) internal successors, (1506), 1398 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:44,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 1506 transitions. [2023-02-17 03:02:44,724 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 1506 transitions. Word has length 266 [2023-02-17 03:02:44,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:02:44,724 INFO L495 AbstractCegarLoop]: Abstraction has 1399 states and 1506 transitions. [2023-02-17 03:02:44,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 6.629032258064516) internal successors, (411), 63 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:02:44,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 1506 transitions. [2023-02-17 03:02:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-02-17 03:02:44,726 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:02:44,726 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 22, 22, 22, 22, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:02:44,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-02-17 03:02:44,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:44,933 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:02:44,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:02:44,934 INFO L85 PathProgramCache]: Analyzing trace with hash -384764090, now seen corresponding path program 4 times [2023-02-17 03:02:44,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:02:44,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265151446] [2023-02-17 03:02:44,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:02:44,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:02:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:02:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1517 proven. 367 refuted. 0 times theorem prover too weak. 1239 trivial. 0 not checked. [2023-02-17 03:02:45,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:02:45,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265151446] [2023-02-17 03:02:45,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265151446] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:02:45,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109973705] [2023-02-17 03:02:45,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 03:02:45,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:02:45,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:02:45,278 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:02:45,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-17 03:04:18,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 03:04:18,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:04:18,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 03:04:18,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:04:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1460 proven. 190 refuted. 0 times theorem prover too weak. 1473 trivial. 0 not checked. [2023-02-17 03:04:18,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:04:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1460 proven. 190 refuted. 0 times theorem prover too weak. 1473 trivial. 0 not checked. [2023-02-17 03:04:18,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109973705] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:04:18,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:04:18,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 34 [2023-02-17 03:04:18,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664307906] [2023-02-17 03:04:18,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:04:18,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-17 03:04:18,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:04:18,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-17 03:04:18,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 03:04:18,321 INFO L87 Difference]: Start difference. First operand 1399 states and 1506 transitions. Second operand has 34 states, 34 states have (on average 6.882352941176471) internal successors, (234), 34 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:04:18,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:04:18,954 INFO L93 Difference]: Finished difference Result 1732 states and 1849 transitions. [2023-02-17 03:04:18,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-17 03:04:18,955 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.882352941176471) internal successors, (234), 34 states have internal predecessors, (234), 0 states have call successors, (0), 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 304 [2023-02-17 03:04:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:04:18,958 INFO L225 Difference]: With dead ends: 1732 [2023-02-17 03:04:18,958 INFO L226 Difference]: Without dead ends: 1732 [2023-02-17 03:04:18,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 580 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=889, Invalid=4367, Unknown=0, NotChecked=0, Total=5256 [2023-02-17 03:04:18,959 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 523 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 03:04:18,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 570 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 03:04:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2023-02-17 03:04:18,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1324. [2023-02-17 03:04:18,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1322 states have (on average 1.073373676248109) internal successors, (1419), 1323 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:04:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1419 transitions. [2023-02-17 03:04:18,972 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1419 transitions. Word has length 304 [2023-02-17 03:04:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:04:18,972 INFO L495 AbstractCegarLoop]: Abstraction has 1324 states and 1419 transitions. [2023-02-17 03:04:18,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.882352941176471) internal successors, (234), 34 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:04:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1419 transitions. [2023-02-17 03:04:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2023-02-17 03:04:18,974 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:04:18,974 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 31, 28, 28, 28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:04:18,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-17 03:04:19,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-17 03:04:19,193 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:04:19,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:04:19,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1244124498, now seen corresponding path program 5 times [2023-02-17 03:04:19,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:04:19,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466589454] [2023-02-17 03:04:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:04:19,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:04:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:04:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4625 backedges. 0 proven. 3942 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2023-02-17 03:04:19,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:04:19,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466589454] [2023-02-17 03:04:19,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466589454] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:04:19,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827994846] [2023-02-17 03:04:19,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 03:04:19,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:04:19,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:04:19,500 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:04:19,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-17 03:04:28,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-17 03:04:28,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:04:28,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 03:04:28,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:04:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4625 backedges. 1306 proven. 2866 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2023-02-17 03:04:28,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:04:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4625 backedges. 1306 proven. 2866 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2023-02-17 03:04:28,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827994846] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:04:28,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:04:28,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20, 20] total 33 [2023-02-17 03:04:28,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100612925] [2023-02-17 03:04:28,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:04:28,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 03:04:28,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:04:28,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 03:04:28,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 03:04:28,782 INFO L87 Difference]: Start difference. First operand 1324 states and 1419 transitions. Second operand has 33 states, 33 states have (on average 8.818181818181818) internal successors, (291), 33 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:04:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:04:29,659 INFO L93 Difference]: Finished difference Result 1227 states and 1306 transitions. [2023-02-17 03:04:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-17 03:04:29,659 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 8.818181818181818) internal successors, (291), 33 states have internal predecessors, (291), 0 states have call successors, (0), 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 364 [2023-02-17 03:04:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:04:29,662 INFO L225 Difference]: With dead ends: 1227 [2023-02-17 03:04:29,662 INFO L226 Difference]: Without dead ends: 1227 [2023-02-17 03:04:29,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 710 SyntacticMatches, 13 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3263 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2087, Invalid=8419, Unknown=0, NotChecked=0, Total=10506 [2023-02-17 03:04:29,663 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 710 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 03:04:29,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 576 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 03:04:29,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2023-02-17 03:04:29,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1194. [2023-02-17 03:04:29,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1192 states have (on average 1.066275167785235) internal successors, (1271), 1193 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:04:29,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1271 transitions. [2023-02-17 03:04:29,673 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1271 transitions. Word has length 364 [2023-02-17 03:04:29,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:04:29,673 INFO L495 AbstractCegarLoop]: Abstraction has 1194 states and 1271 transitions. [2023-02-17 03:04:29,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.818181818181818) internal successors, (291), 33 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:04:29,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1271 transitions. [2023-02-17 03:04:29,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-02-17 03:04:29,675 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:04:29,675 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 43, 43, 40, 40, 40, 40, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:04:29,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-02-17 03:04:29,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-17 03:04:29,881 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:04:29,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:04:29,881 INFO L85 PathProgramCache]: Analyzing trace with hash 569902066, now seen corresponding path program 6 times [2023-02-17 03:04:29,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:04:29,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103165068] [2023-02-17 03:04:29,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:04:29,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:04:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:04:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8970 backedges. 5578 proven. 321 refuted. 0 times theorem prover too weak. 3071 trivial. 0 not checked. [2023-02-17 03:04:30,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:04:30,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103165068] [2023-02-17 03:04:30,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103165068] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:04:30,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772192626] [2023-02-17 03:04:30,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 03:04:30,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:04:30,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:04:30,538 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:04:30,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-17 03:05:01,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-02-17 03:05:01,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:05:01,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 2017 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 03:05:01,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:05:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8970 backedges. 4306 proven. 2667 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2023-02-17 03:05:01,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:05:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8970 backedges. 4306 proven. 2667 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2023-02-17 03:05:01,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772192626] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:05:01,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:05:01,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 43 [2023-02-17 03:05:01,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487773222] [2023-02-17 03:05:01,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:05:01,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-17 03:05:01,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:05:01,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-17 03:05:01,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 03:05:01,426 INFO L87 Difference]: Start difference. First operand 1194 states and 1271 transitions. Second operand has 43 states, 43 states have (on average 7.651162790697675) internal successors, (329), 43 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:05:08,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:05:08,203 INFO L93 Difference]: Finished difference Result 7190 states and 7890 transitions. [2023-02-17 03:05:08,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 378 states. [2023-02-17 03:05:08,204 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 7.651162790697675) internal successors, (329), 43 states have internal predecessors, (329), 0 states have call successors, (0), 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 494 [2023-02-17 03:05:08,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:05:08,216 INFO L225 Difference]: With dead ends: 7190 [2023-02-17 03:05:08,216 INFO L226 Difference]: Without dead ends: 7190 [2023-02-17 03:05:08,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1384 GetRequests, 968 SyntacticMatches, 0 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72269 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=22227, Invalid=152079, Unknown=0, NotChecked=0, Total=174306 [2023-02-17 03:05:08,227 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 3726 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 2114 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3726 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:05:08,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3726 Valid, 861 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2114 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-17 03:05:08,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7190 states. [2023-02-17 03:05:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7190 to 4893. [2023-02-17 03:05:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4891 states have (on average 1.0811694949907995) internal successors, (5288), 4892 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:05:08,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 5288 transitions. [2023-02-17 03:05:08,277 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 5288 transitions. Word has length 494 [2023-02-17 03:05:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:05:08,277 INFO L495 AbstractCegarLoop]: Abstraction has 4893 states and 5288 transitions. [2023-02-17 03:05:08,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 7.651162790697675) internal successors, (329), 43 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:05:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 5288 transitions. [2023-02-17 03:05:08,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2023-02-17 03:05:08,285 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:05:08,285 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 92, 52, 52, 52, 52, 52, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:05:08,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-17 03:05:08,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-17 03:05:08,501 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:05:08,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:05:08,501 INFO L85 PathProgramCache]: Analyzing trace with hash 708196276, now seen corresponding path program 7 times [2023-02-17 03:05:08,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:05:08,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799115979] [2023-02-17 03:05:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:05:08,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:05:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:05:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25574 backedges. 12449 proven. 3405 refuted. 0 times theorem prover too weak. 9720 trivial. 0 not checked. [2023-02-17 03:05:09,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:05:09,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799115979] [2023-02-17 03:05:09,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799115979] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:05:09,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933924254] [2023-02-17 03:05:09,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 03:05:09,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:05:09,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:05:09,502 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:05:09,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-17 03:05:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:05:09,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 2827 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 03:05:09,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:05:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25574 backedges. 2496 proven. 49 refuted. 0 times theorem prover too weak. 23029 trivial. 0 not checked. [2023-02-17 03:05:10,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:05:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25574 backedges. 2496 proven. 49 refuted. 0 times theorem prover too weak. 23029 trivial. 0 not checked. [2023-02-17 03:05:10,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933924254] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:05:10,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:05:10,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 25 [2023-02-17 03:05:10,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153215813] [2023-02-17 03:05:10,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:05:10,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 03:05:10,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:05:10,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 03:05:10,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-02-17 03:05:10,105 INFO L87 Difference]: Start difference. First operand 4893 states and 5288 transitions. Second operand has 25 states, 25 states have (on average 8.48) internal successors, (212), 25 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:05:10,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:05:10,649 INFO L93 Difference]: Finished difference Result 1420 states and 1526 transitions. [2023-02-17 03:05:10,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-17 03:05:10,650 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.48) internal successors, (212), 25 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 758 [2023-02-17 03:05:10,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:05:10,653 INFO L225 Difference]: With dead ends: 1420 [2023-02-17 03:05:10,653 INFO L226 Difference]: Without dead ends: 1420 [2023-02-17 03:05:10,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1580 GetRequests, 1502 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1214, Invalid=4042, Unknown=0, NotChecked=0, Total=5256 [2023-02-17 03:05:10,654 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 534 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:05:10,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 346 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:05:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2023-02-17 03:05:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1420. [2023-02-17 03:05:10,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1418 states have (on average 1.076163610719323) internal successors, (1526), 1419 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:05:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1526 transitions. [2023-02-17 03:05:10,664 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1526 transitions. Word has length 758 [2023-02-17 03:05:10,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:05:10,664 INFO L495 AbstractCegarLoop]: Abstraction has 1420 states and 1526 transitions. [2023-02-17 03:05:10,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.48) internal successors, (212), 25 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:05:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1526 transitions. [2023-02-17 03:05:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2023-02-17 03:05:10,669 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:05:10,670 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 77, 77, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 2, 1, 1, 1] [2023-02-17 03:05:10,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-17 03:05:10,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-17 03:05:10,878 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:05:10,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:05:10,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1147359220, now seen corresponding path program 8 times [2023-02-17 03:05:10,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:05:10,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502791286] [2023-02-17 03:05:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:05:10,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:05:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:05:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 29771 backedges. 9074 proven. 429 refuted. 0 times theorem prover too weak. 20268 trivial. 0 not checked. [2023-02-17 03:05:12,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:05:12,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502791286] [2023-02-17 03:05:12,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502791286] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:05:12,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084357113] [2023-02-17 03:05:12,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:05:12,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:05:12,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:05:12,214 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:05:12,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-17 03:05:12,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:05:12,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:05:12,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 3389 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-17 03:05:12,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:05:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 29771 backedges. 18216 proven. 1184 refuted. 0 times theorem prover too weak. 10371 trivial. 0 not checked. [2023-02-17 03:05:12,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:05:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 29771 backedges. 18216 proven. 1184 refuted. 0 times theorem prover too weak. 10371 trivial. 0 not checked. [2023-02-17 03:05:13,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084357113] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:05:13,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:05:13,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2023-02-17 03:05:13,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626933605] [2023-02-17 03:05:13,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:05:13,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-17 03:05:13,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:05:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-17 03:05:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2023-02-17 03:05:13,119 INFO L87 Difference]: Start difference. First operand 1420 states and 1526 transitions. Second operand has 35 states, 35 states have (on average 8.8) internal successors, (308), 35 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:05:14,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:05:14,054 INFO L93 Difference]: Finished difference Result 1501 states and 1605 transitions. [2023-02-17 03:05:14,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-17 03:05:14,054 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 8.8) internal successors, (308), 35 states have internal predecessors, (308), 0 states have call successors, (0), 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 858 [2023-02-17 03:05:14,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:05:14,057 INFO L225 Difference]: With dead ends: 1501 [2023-02-17 03:05:14,057 INFO L226 Difference]: Without dead ends: 1501 [2023-02-17 03:05:14,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1781 GetRequests, 1683 SyntacticMatches, 18 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1260, Invalid=5382, Unknown=0, NotChecked=0, Total=6642 [2023-02-17 03:05:14,061 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 192 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 03:05:14,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 1015 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 03:05:14,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2023-02-17 03:05:14,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1465. [2023-02-17 03:05:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1463 states have (on average 1.072453861927546) internal successors, (1569), 1464 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:05:14,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 1569 transitions. [2023-02-17 03:05:14,071 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 1569 transitions. Word has length 858 [2023-02-17 03:05:14,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:05:14,072 INFO L495 AbstractCegarLoop]: Abstraction has 1465 states and 1569 transitions. [2023-02-17 03:05:14,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 8.8) internal successors, (308), 35 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:05:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 1569 transitions. [2023-02-17 03:05:14,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 894 [2023-02-17 03:05:14,077 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:05:14,078 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 84, 84, 77, 77, 77, 77, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 2, 1, 1, 1] [2023-02-17 03:05:14,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-02-17 03:05:14,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-02-17 03:05:14,286 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:05:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:05:14,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1704168183, now seen corresponding path program 9 times [2023-02-17 03:05:14,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:05:14,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830991159] [2023-02-17 03:05:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:05:14,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:05:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:05:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 32676 backedges. 19820 proven. 2329 refuted. 0 times theorem prover too weak. 10527 trivial. 0 not checked. [2023-02-17 03:05:15,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:05:15,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830991159] [2023-02-17 03:05:15,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830991159] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:05:15,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379504560] [2023-02-17 03:05:15,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:05:15,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:05:15,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:05:15,725 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:05:15,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-17 03:05:18,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-17 03:05:18,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:05:18,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1580 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 03:05:18,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:05:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 32676 backedges. 11542 proven. 16946 refuted. 0 times theorem prover too weak. 4188 trivial. 0 not checked. [2023-02-17 03:05:18,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:05:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 32676 backedges. 11542 proven. 16946 refuted. 0 times theorem prover too weak. 4188 trivial. 0 not checked. [2023-02-17 03:05:18,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379504560] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:05:18,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:05:18,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 39 [2023-02-17 03:05:18,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138132342] [2023-02-17 03:05:18,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:05:18,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-17 03:05:18,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:05:18,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-17 03:05:18,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2023-02-17 03:05:18,711 INFO L87 Difference]: Start difference. First operand 1465 states and 1569 transitions. Second operand has 39 states, 39 states have (on average 8.205128205128204) internal successors, (320), 39 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:05:19,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:05:19,238 INFO L93 Difference]: Finished difference Result 1493 states and 1590 transitions. [2023-02-17 03:05:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-17 03:05:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 8.205128205128204) internal successors, (320), 39 states have internal predecessors, (320), 0 states have call successors, (0), 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 893 [2023-02-17 03:05:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:05:19,241 INFO L225 Difference]: With dead ends: 1493 [2023-02-17 03:05:19,241 INFO L226 Difference]: Without dead ends: 1493 [2023-02-17 03:05:19,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1832 GetRequests, 1749 SyntacticMatches, 18 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=958, Invalid=3464, Unknown=0, NotChecked=0, Total=4422 [2023-02-17 03:05:19,243 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 136 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:05:19,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 938 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:05:19,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2023-02-17 03:05:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1481. [2023-02-17 03:05:19,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1479 states have (on average 1.0669371196754565) internal successors, (1578), 1480 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:05:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 1578 transitions. [2023-02-17 03:05:19,254 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 1578 transitions. Word has length 893 [2023-02-17 03:05:19,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:05:19,255 INFO L495 AbstractCegarLoop]: Abstraction has 1481 states and 1578 transitions. [2023-02-17 03:05:19,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 8.205128205128204) internal successors, (320), 39 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:05:19,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 1578 transitions. [2023-02-17 03:05:19,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 922 [2023-02-17 03:05:19,260 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:05:19,261 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 84, 84, 84, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 2, 1, 1, 1] [2023-02-17 03:05:19,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-17 03:05:19,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:05:19,469 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-17 03:05:19,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:05:19,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1721483028, now seen corresponding path program 10 times [2023-02-17 03:05:19,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:05:19,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606973628] [2023-02-17 03:05:19,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:05:19,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:05:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:05:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 35021 backedges. 11088 proven. 552 refuted. 0 times theorem prover too weak. 23381 trivial. 0 not checked. [2023-02-17 03:05:20,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:05:20,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606973628] [2023-02-17 03:05:20,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606973628] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:05:20,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586889588] [2023-02-17 03:05:20,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 03:05:20,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:05:20,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:05:20,935 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:05:20,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process