./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 16:55:27,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 16:55:27,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 16:55:27,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 16:55:27,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 16:55:27,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 16:55:27,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 16:55:27,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 16:55:27,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 16:55:27,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 16:55:27,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 16:55:27,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 16:55:27,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 16:55:27,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 16:55:28,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 16:55:28,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 16:55:28,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 16:55:28,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 16:55:28,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 16:55:28,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 16:55:28,011 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 16:55:28,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 16:55:28,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 16:55:28,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 16:55:28,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 16:55:28,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 16:55:28,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 16:55:28,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 16:55:28,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 16:55:28,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 16:55:28,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 16:55:28,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 16:55:28,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 16:55:28,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 16:55:28,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 16:55:28,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 16:55:28,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 16:55:28,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 16:55:28,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 16:55:28,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 16:55:28,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 16:55:28,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 16:55:28,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 16:55:28,073 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 16:55:28,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 16:55:28,073 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 16:55:28,074 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 16:55:28,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 16:55:28,074 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 16:55:28,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 16:55:28,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 16:55:28,075 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 16:55:28,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 16:55:28,076 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 16:55:28,077 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 16:55:28,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 16:55:28,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 16:55:28,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 16:55:28,078 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 16:55:28,078 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 16:55:28,078 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 16:55:28,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 16:55:28,078 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 16:55:28,079 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 16:55:28,079 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 16:55:28,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 16:55:28,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 16:55:28,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 16:55:28,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:55:28,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 16:55:28,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 16:55:28,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 16:55:28,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 16:55:28,081 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d [2022-07-21 16:55:28,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 16:55:28,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 16:55:28,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 16:55:28,424 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 16:55:28,424 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 16:55:28,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2022-07-21 16:55:28,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aaa4dbbf/84d9e2df826d491f936dd4b38a92ce77/FLAG110ea4ae2 [2022-07-21 16:55:29,002 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 16:55:29,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2022-07-21 16:55:29,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aaa4dbbf/84d9e2df826d491f936dd4b38a92ce77/FLAG110ea4ae2 [2022-07-21 16:55:29,485 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aaa4dbbf/84d9e2df826d491f936dd4b38a92ce77 [2022-07-21 16:55:29,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 16:55:29,488 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 16:55:29,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 16:55:29,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 16:55:29,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 16:55:29,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:55:29" (1/1) ... [2022-07-21 16:55:29,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15810f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:29, skipping insertion in model container [2022-07-21 16:55:29,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:55:29" (1/1) ... [2022-07-21 16:55:29,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 16:55:29,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 16:55:29,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:55:29,817 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 16:55:29,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:55:29,898 INFO L208 MainTranslator]: Completed translation [2022-07-21 16:55:29,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:29 WrapperNode [2022-07-21 16:55:29,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 16:55:29,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 16:55:29,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 16:55:29,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 16:55:29,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:29" (1/1) ... [2022-07-21 16:55:29,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:29" (1/1) ... [2022-07-21 16:55:29,963 INFO L137 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2022-07-21 16:55:29,964 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 16:55:29,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 16:55:29,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 16:55:29,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 16:55:29,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:29" (1/1) ... [2022-07-21 16:55:29,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:29" (1/1) ... [2022-07-21 16:55:29,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:29" (1/1) ... [2022-07-21 16:55:29,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:29" (1/1) ... [2022-07-21 16:55:29,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:29" (1/1) ... [2022-07-21 16:55:30,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:29" (1/1) ... [2022-07-21 16:55:30,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:29" (1/1) ... [2022-07-21 16:55:30,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 16:55:30,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 16:55:30,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 16:55:30,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 16:55:30,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:29" (1/1) ... [2022-07-21 16:55:30,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:55:30,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:30,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 16:55:30,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 16:55:30,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 16:55:30,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 16:55:30,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 16:55:30,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 16:55:30,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 16:55:30,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 16:55:30,190 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 16:55:30,191 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 16:55:30,380 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 16:55:30,396 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 16:55:30,397 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 16:55:30,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:55:30 BoogieIcfgContainer [2022-07-21 16:55:30,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 16:55:30,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 16:55:30,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 16:55:30,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 16:55:30,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:55:29" (1/3) ... [2022-07-21 16:55:30,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2f1e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:55:30, skipping insertion in model container [2022-07-21 16:55:30,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:29" (2/3) ... [2022-07-21 16:55:30,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2f1e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:55:30, skipping insertion in model container [2022-07-21 16:55:30,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:55:30" (3/3) ... [2022-07-21 16:55:30,406 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-2.i [2022-07-21 16:55:30,418 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 16:55:30,424 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-07-21 16:55:30,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 16:55:30,474 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@728fad13, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@485ed6fa [2022-07-21 16:55:30,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-07-21 16:55:30,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:30,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:55:30,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:30,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:30,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:30,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:30,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-21 16:55:30,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:30,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517996376] [2022-07-21 16:55:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:30,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:30,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517996376] [2022-07-21 16:55:30,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517996376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:30,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:30,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:30,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782405585] [2022-07-21 16:55:30,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:30,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:30,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:30,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:30,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:30,757 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 41 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) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:30,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:30,811 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-07-21 16:55:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:30,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 16:55:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:30,822 INFO L225 Difference]: With dead ends: 76 [2022-07-21 16:55:30,822 INFO L226 Difference]: Without dead ends: 72 [2022-07-21 16:55:30,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:30,829 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 70 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:30,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 84 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-21 16:55:30,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 43. [2022-07-21 16:55:30,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 42 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) [2022-07-21 16:55:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-07-21 16:55:30,870 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2022-07-21 16:55:30,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:30,871 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-07-21 16:55:30,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:30,872 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-07-21 16:55:30,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:55:30,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:30,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:30,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 16:55:30,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:30,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:30,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-21 16:55:30,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:30,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598149358] [2022-07-21 16:55:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:30,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:30,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:30,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598149358] [2022-07-21 16:55:30,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598149358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:30,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:30,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:55:30,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401245537] [2022-07-21 16:55:30,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:30,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:55:30,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:30,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:55:30,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:55:30,934 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:30,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:30,978 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-07-21 16:55:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:55:30,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 16:55:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:30,979 INFO L225 Difference]: With dead ends: 41 [2022-07-21 16:55:30,980 INFO L226 Difference]: Without dead ends: 41 [2022-07-21 16:55:30,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:55:30,981 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:30,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 33 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:30,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-21 16:55:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-07-21 16:55:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-07-21 16:55:30,988 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 7 [2022-07-21 16:55:30,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:30,988 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-07-21 16:55:30,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:30,989 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-07-21 16:55:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:55:30,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:30,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:30,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 16:55:30,990 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:30,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-21 16:55:30,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:30,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903064984] [2022-07-21 16:55:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:30,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:31,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:31,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903064984] [2022-07-21 16:55:31,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903064984] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:31,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:31,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:55:31,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201771048] [2022-07-21 16:55:31,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:31,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:31,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:31,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:31,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:31,105 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:31,215 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2022-07-21 16:55:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:31,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 16:55:31,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:31,217 INFO L225 Difference]: With dead ends: 73 [2022-07-21 16:55:31,217 INFO L226 Difference]: Without dead ends: 73 [2022-07-21 16:55:31,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:31,219 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 36 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:31,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 76 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:31,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-21 16:55:31,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2022-07-21 16:55:31,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.5625) internal successors, (50), 42 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) [2022-07-21 16:55:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-07-21 16:55:31,228 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 7 [2022-07-21 16:55:31,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:31,229 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-07-21 16:55:31,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-07-21 16:55:31,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:55:31,230 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:31,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:31,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 16:55:31,231 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:31,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:31,231 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-21 16:55:31,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:31,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831197630] [2022-07-21 16:55:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:31,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:31,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:31,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831197630] [2022-07-21 16:55:31,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831197630] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:31,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:31,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:31,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383839066] [2022-07-21 16:55:31,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:31,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:55:31,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:31,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:55:31,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:31,342 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:31,447 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2022-07-21 16:55:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:55:31,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-21 16:55:31,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:31,449 INFO L225 Difference]: With dead ends: 70 [2022-07-21 16:55:31,449 INFO L226 Difference]: Without dead ends: 70 [2022-07-21 16:55:31,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:55:31,451 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 91 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:31,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 117 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-21 16:55:31,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2022-07-21 16:55:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-07-21 16:55:31,457 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 9 [2022-07-21 16:55:31,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:31,457 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-07-21 16:55:31,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,458 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-07-21 16:55:31,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:55:31,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:31,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:31,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 16:55:31,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:31,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:31,460 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-21 16:55:31,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:31,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515473106] [2022-07-21 16:55:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:31,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:31,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:31,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515473106] [2022-07-21 16:55:31,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515473106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:31,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:31,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:31,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634704891] [2022-07-21 16:55:31,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:31,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:31,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:31,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:31,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:31,501 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:31,524 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-07-21 16:55:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:31,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-21 16:55:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:31,525 INFO L225 Difference]: With dead ends: 85 [2022-07-21 16:55:31,526 INFO L226 Difference]: Without dead ends: 85 [2022-07-21 16:55:31,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:31,527 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 29 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:31,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:31,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-21 16:55:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2022-07-21 16:55:31,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 61 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) [2022-07-21 16:55:31,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-07-21 16:55:31,543 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 9 [2022-07-21 16:55:31,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:31,545 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-07-21 16:55:31,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,545 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-07-21 16:55:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:55:31,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:31,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:31,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 16:55:31,548 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:31,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:31,549 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-21 16:55:31,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:31,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755557683] [2022-07-21 16:55:31,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:31,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:31,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:31,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755557683] [2022-07-21 16:55:31,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755557683] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:31,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:31,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:55:31,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412747835] [2022-07-21 16:55:31,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:31,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:55:31,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:31,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:55:31,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:55:31,610 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:31,636 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-07-21 16:55:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:55:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-21 16:55:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:31,637 INFO L225 Difference]: With dead ends: 60 [2022-07-21 16:55:31,637 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 16:55:31,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:55:31,638 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:31,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:31,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 16:55:31,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-21 16:55:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.411764705882353) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-07-21 16:55:31,651 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 9 [2022-07-21 16:55:31,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:31,652 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-07-21 16:55:31,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-07-21 16:55:31,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:55:31,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:31,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:31,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 16:55:31,653 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:31,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:31,657 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-21 16:55:31,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:31,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447377963] [2022-07-21 16:55:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:31,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:31,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:31,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447377963] [2022-07-21 16:55:31,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447377963] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:31,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:31,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:31,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163028211] [2022-07-21 16:55:31,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:31,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:55:31,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:31,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:55:31,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:31,749 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:31,815 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2022-07-21 16:55:31,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:55:31,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-21 16:55:31,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:31,818 INFO L225 Difference]: With dead ends: 89 [2022-07-21 16:55:31,818 INFO L226 Difference]: Without dead ends: 89 [2022-07-21 16:55:31,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:55:31,823 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:31,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 70 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:31,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-21 16:55:31,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2022-07-21 16:55:31,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-07-21 16:55:31,842 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 9 [2022-07-21 16:55:31,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:31,843 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-07-21 16:55:31,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,843 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-07-21 16:55:31,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:55:31,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:31,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:31,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 16:55:31,845 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:31,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:31,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2022-07-21 16:55:31,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:31,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360576640] [2022-07-21 16:55:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:31,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:31,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:31,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360576640] [2022-07-21 16:55:31,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360576640] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:31,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:31,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:55:31,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223563515] [2022-07-21 16:55:31,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:31,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:31,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:31,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:31,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:31,899 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:31,927 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2022-07-21 16:55:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:31,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-21 16:55:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:31,928 INFO L225 Difference]: With dead ends: 63 [2022-07-21 16:55:31,928 INFO L226 Difference]: Without dead ends: 63 [2022-07-21 16:55:31,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:31,929 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:31,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 28 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-21 16:55:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2022-07-21 16:55:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2022-07-21 16:55:31,934 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 9 [2022-07-21 16:55:31,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:31,934 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2022-07-21 16:55:31,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2022-07-21 16:55:31,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:55:31,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:31,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:31,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 16:55:31,935 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:31,936 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-21 16:55:31,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:31,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516469897] [2022-07-21 16:55:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:31,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:31,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:31,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516469897] [2022-07-21 16:55:31,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516469897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:31,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:31,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:55:31,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124435186] [2022-07-21 16:55:31,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:31,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:31,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:31,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:31,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:31,977 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:31,997 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-07-21 16:55:31,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:31,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-21 16:55:31,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:31,998 INFO L225 Difference]: With dead ends: 52 [2022-07-21 16:55:31,999 INFO L226 Difference]: Without dead ends: 52 [2022-07-21 16:55:31,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:32,004 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:32,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 28 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-21 16:55:32,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-21 16:55:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.4) internal successors, (63), 51 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) [2022-07-21 16:55:32,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-07-21 16:55:32,008 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 10 [2022-07-21 16:55:32,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:32,008 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-07-21 16:55:32,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:32,009 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-07-21 16:55:32,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 16:55:32,009 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:32,009 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:32,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 16:55:32,010 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:32,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:32,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-21 16:55:32,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:32,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973367057] [2022-07-21 16:55:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:32,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:32,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:32,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973367057] [2022-07-21 16:55:32,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973367057] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:32,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158817038] [2022-07-21 16:55:32,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:32,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:32,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:32,077 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:32,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 16:55:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:32,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 16:55:32,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:32,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:55:32,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:55:32,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:32,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:32,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158817038] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:32,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:32,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-21 16:55:32,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984230286] [2022-07-21 16:55:32,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:32,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:55:32,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:32,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:55:32,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:55:32,625 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:32,781 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2022-07-21 16:55:32,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:55:32,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-21 16:55:32,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:32,787 INFO L225 Difference]: With dead ends: 113 [2022-07-21 16:55:32,787 INFO L226 Difference]: Without dead ends: 113 [2022-07-21 16:55:32,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:55:32,788 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 139 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:32,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 182 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:32,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-21 16:55:32,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 47. [2022-07-21 16:55:32,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-21 16:55:32,792 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 11 [2022-07-21 16:55:32,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:32,793 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-21 16:55:32,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:32,793 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-21 16:55:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:55:32,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:32,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:32,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 16:55:33,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 16:55:33,017 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:33,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446013, now seen corresponding path program 1 times [2022-07-21 16:55:33,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:33,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406696275] [2022-07-21 16:55:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:33,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:33,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:33,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406696275] [2022-07-21 16:55:33,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406696275] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:33,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:33,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:33,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876460620] [2022-07-21 16:55:33,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:33,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:55:33,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:33,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:55:33,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:33,061 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:33,095 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-07-21 16:55:33,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:55:33,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-07-21 16:55:33,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:33,100 INFO L225 Difference]: With dead ends: 46 [2022-07-21 16:55:33,100 INFO L226 Difference]: Without dead ends: 46 [2022-07-21 16:55:33,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:55:33,101 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:33,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 65 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-21 16:55:33,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-21 16:55:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-07-21 16:55:33,108 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 13 [2022-07-21 16:55:33,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:33,108 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-07-21 16:55:33,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:33,109 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-07-21 16:55:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:55:33,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:33,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:33,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 16:55:33,110 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:33,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:33,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446012, now seen corresponding path program 1 times [2022-07-21 16:55:33,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:33,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435262868] [2022-07-21 16:55:33,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:33,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:33,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:33,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435262868] [2022-07-21 16:55:33,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435262868] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:33,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:33,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 16:55:33,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617727972] [2022-07-21 16:55:33,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:33,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:55:33,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:33,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:55:33,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:55:33,193 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:33,257 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-07-21 16:55:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:55:33,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-07-21 16:55:33,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:33,258 INFO L225 Difference]: With dead ends: 49 [2022-07-21 16:55:33,259 INFO L226 Difference]: Without dead ends: 49 [2022-07-21 16:55:33,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:55:33,259 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 94 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:33,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 75 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-21 16:55:33,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-07-21 16:55:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:33,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-07-21 16:55:33,267 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 13 [2022-07-21 16:55:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:33,267 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-07-21 16:55:33,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-07-21 16:55:33,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:55:33,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:33,269 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:33,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 16:55:33,269 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:33,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:33,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-21 16:55:33,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:33,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570015748] [2022-07-21 16:55:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:33,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:33,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:33,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570015748] [2022-07-21 16:55:33,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570015748] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:33,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473589207] [2022-07-21 16:55:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:33,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:33,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:33,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:33,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 16:55:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:33,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 16:55:33,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:33,451 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:33,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:33,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:33,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473589207] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:33,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:33,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-21 16:55:33,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768087711] [2022-07-21 16:55:33,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:33,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 16:55:33,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:33,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 16:55:33,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:55:33,673 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:33,808 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2022-07-21 16:55:33,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:55:33,809 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 13 [2022-07-21 16:55:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:33,809 INFO L225 Difference]: With dead ends: 88 [2022-07-21 16:55:33,809 INFO L226 Difference]: Without dead ends: 88 [2022-07-21 16:55:33,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-07-21 16:55:33,811 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 216 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:33,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 153 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:33,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-21 16:55:33,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 45. [2022-07-21 16:55:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:33,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-07-21 16:55:33,818 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 13 [2022-07-21 16:55:33,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:33,818 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-07-21 16:55:33,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:33,819 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-07-21 16:55:33,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:55:33,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:33,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:33,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:34,043 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,SelfDestructingSolverStorable12 [2022-07-21 16:55:34,044 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:34,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1429572955, now seen corresponding path program 1 times [2022-07-21 16:55:34,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:34,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222794923] [2022-07-21 16:55:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:34,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:34,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:34,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222794923] [2022-07-21 16:55:34,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222794923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:34,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:34,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:55:34,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803679485] [2022-07-21 16:55:34,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:34,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 16:55:34,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:34,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 16:55:34,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:55:34,091 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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) [2022-07-21 16:55:34,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:34,143 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-07-21 16:55:34,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:55:34,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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 [2022-07-21 16:55:34,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:34,146 INFO L225 Difference]: With dead ends: 45 [2022-07-21 16:55:34,146 INFO L226 Difference]: Without dead ends: 45 [2022-07-21 16:55:34,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:55:34,147 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:34,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 74 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:34,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-21 16:55:34,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-07-21 16:55:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-07-21 16:55:34,150 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 16 [2022-07-21 16:55:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:34,151 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-07-21 16:55:34,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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) [2022-07-21 16:55:34,151 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-07-21 16:55:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:55:34,154 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:34,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:34,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 16:55:34,154 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:34,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1429572954, now seen corresponding path program 1 times [2022-07-21 16:55:34,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:34,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836484125] [2022-07-21 16:55:34,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:34,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:34,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:34,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836484125] [2022-07-21 16:55:34,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836484125] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:34,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:34,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 16:55:34,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431577620] [2022-07-21 16:55:34,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:34,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:55:34,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:34,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:55:34,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 16:55:34,252 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 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) [2022-07-21 16:55:34,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:34,330 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-07-21 16:55:34,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:55:34,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 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 [2022-07-21 16:55:34,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:34,331 INFO L225 Difference]: With dead ends: 48 [2022-07-21 16:55:34,332 INFO L226 Difference]: Without dead ends: 48 [2022-07-21 16:55:34,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-21 16:55:34,333 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 83 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:34,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 82 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:34,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-21 16:55:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-07-21 16:55:34,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 45 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) [2022-07-21 16:55:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-07-21 16:55:34,335 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 16 [2022-07-21 16:55:34,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:34,335 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-07-21 16:55:34,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 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) [2022-07-21 16:55:34,335 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-07-21 16:55:34,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 16:55:34,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:34,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:34,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 16:55:34,337 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:34,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:34,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2056472215, now seen corresponding path program 1 times [2022-07-21 16:55:34,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:34,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15067352] [2022-07-21 16:55:34,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:34,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:34,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:34,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15067352] [2022-07-21 16:55:34,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15067352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:34,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:34,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:55:34,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989074481] [2022-07-21 16:55:34,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:34,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:34,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:34,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:34,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:34,416 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:34,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:34,434 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-07-21 16:55:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:34,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-21 16:55:34,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:34,435 INFO L225 Difference]: With dead ends: 45 [2022-07-21 16:55:34,435 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 16:55:34,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:34,436 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:34,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 50 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 16:55:34,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-21 16:55:34,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 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) [2022-07-21 16:55:34,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-07-21 16:55:34,440 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 20 [2022-07-21 16:55:34,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:34,440 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-07-21 16:55:34,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:34,440 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-07-21 16:55:34,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 16:55:34,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:34,441 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:34,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 16:55:34,441 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:34,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:34,442 INFO L85 PathProgramCache]: Analyzing trace with hash 673920784, now seen corresponding path program 1 times [2022-07-21 16:55:34,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:34,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114900422] [2022-07-21 16:55:34,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:34,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:34,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:34,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114900422] [2022-07-21 16:55:34,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114900422] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:34,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:34,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 16:55:34,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519130623] [2022-07-21 16:55:34,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:34,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 16:55:34,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:34,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 16:55:34,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:55:34,661 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:34,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:34,996 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-07-21 16:55:34,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 16:55:34,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-21 16:55:34,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:34,997 INFO L225 Difference]: With dead ends: 66 [2022-07-21 16:55:34,998 INFO L226 Difference]: Without dead ends: 66 [2022-07-21 16:55:34,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-07-21 16:55:34,998 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:34,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 209 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:34,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-21 16:55:35,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2022-07-21 16:55:35,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-07-21 16:55:35,001 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 21 [2022-07-21 16:55:35,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:35,001 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-07-21 16:55:35,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,002 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-07-21 16:55:35,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 16:55:35,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:35,002 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:35,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 16:55:35,002 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:35,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:35,003 INFO L85 PathProgramCache]: Analyzing trace with hash 673922962, now seen corresponding path program 1 times [2022-07-21 16:55:35,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:35,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255196750] [2022-07-21 16:55:35,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:35,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:35,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:35,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255196750] [2022-07-21 16:55:35,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255196750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:35,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:35,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 16:55:35,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95437940] [2022-07-21 16:55:35,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:35,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:55:35,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:35,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:55:35,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:55:35,111 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:35,295 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-07-21 16:55:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 16:55:35,295 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-21 16:55:35,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:35,296 INFO L225 Difference]: With dead ends: 96 [2022-07-21 16:55:35,296 INFO L226 Difference]: Without dead ends: 81 [2022-07-21 16:55:35,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2022-07-21 16:55:35,297 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:35,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 184 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-21 16:55:35,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2022-07-21 16:55:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2022-07-21 16:55:35,299 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 21 [2022-07-21 16:55:35,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:35,300 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2022-07-21 16:55:35,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,300 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2022-07-21 16:55:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 16:55:35,300 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:35,300 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:35,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 16:55:35,301 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:35,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:35,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1320221744, now seen corresponding path program 1 times [2022-07-21 16:55:35,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:35,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562159469] [2022-07-21 16:55:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:35,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:35,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:35,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562159469] [2022-07-21 16:55:35,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562159469] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:35,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:35,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-21 16:55:35,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499121122] [2022-07-21 16:55:35,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:35,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 16:55:35,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:35,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 16:55:35,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-21 16:55:35,424 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:35,654 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2022-07-21 16:55:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 16:55:35,654 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-21 16:55:35,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:35,655 INFO L225 Difference]: With dead ends: 117 [2022-07-21 16:55:35,655 INFO L226 Difference]: Without dead ends: 106 [2022-07-21 16:55:35,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2022-07-21 16:55:35,656 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 91 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:35,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 191 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-21 16:55:35,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 74. [2022-07-21 16:55:35,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2022-07-21 16:55:35,659 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 21 [2022-07-21 16:55:35,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:35,659 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2022-07-21 16:55:35,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,659 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2022-07-21 16:55:35,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 16:55:35,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:35,660 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:35,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 16:55:35,660 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:35,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:35,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1015022958, now seen corresponding path program 1 times [2022-07-21 16:55:35,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:35,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597362496] [2022-07-21 16:55:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:35,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:35,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:35,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597362496] [2022-07-21 16:55:35,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597362496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:35,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:35,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 16:55:35,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915138889] [2022-07-21 16:55:35,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:35,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 16:55:35,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:35,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 16:55:35,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-21 16:55:35,824 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:35,967 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2022-07-21 16:55:35,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:55:35,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-21 16:55:35,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:35,969 INFO L225 Difference]: With dead ends: 118 [2022-07-21 16:55:35,970 INFO L226 Difference]: Without dead ends: 105 [2022-07-21 16:55:35,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-07-21 16:55:35,970 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 84 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:35,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 178 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:35,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-21 16:55:35,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2022-07-21 16:55:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2022-07-21 16:55:35,973 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 21 [2022-07-21 16:55:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:35,973 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2022-07-21 16:55:35,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2022-07-21 16:55:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 16:55:35,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:35,974 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:35,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 16:55:35,974 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:35,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:35,974 INFO L85 PathProgramCache]: Analyzing trace with hash -359665389, now seen corresponding path program 1 times [2022-07-21 16:55:35,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:35,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472521814] [2022-07-21 16:55:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:35,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:36,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:36,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472521814] [2022-07-21 16:55:36,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472521814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:36,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306211676] [2022-07-21 16:55:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:36,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:36,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:36,104 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:36,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 16:55:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:36,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 16:55:36,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:36,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:36,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:55:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:36,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306211676] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:36,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:36,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-07-21 16:55:36,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547278752] [2022-07-21 16:55:36,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:36,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 16:55:36,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:36,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 16:55:36,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-07-21 16:55:36,448 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 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) [2022-07-21 16:55:36,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:36,868 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2022-07-21 16:55:36,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 16:55:36,869 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 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) Word has length 25 [2022-07-21 16:55:36,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:36,869 INFO L225 Difference]: With dead ends: 101 [2022-07-21 16:55:36,869 INFO L226 Difference]: Without dead ends: 101 [2022-07-21 16:55:36,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2022-07-21 16:55:36,870 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 186 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:36,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 294 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:55:36,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-21 16:55:36,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2022-07-21 16:55:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.1666666666666667) internal successors, (98), 85 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2022-07-21 16:55:36,873 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 25 [2022-07-21 16:55:36,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:36,873 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2022-07-21 16:55:36,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 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) [2022-07-21 16:55:36,873 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2022-07-21 16:55:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 16:55:36,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:36,874 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:36,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 16:55:37,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:37,074 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:37,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:37,075 INFO L85 PathProgramCache]: Analyzing trace with hash 501654165, now seen corresponding path program 1 times [2022-07-21 16:55:37,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:37,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306367626] [2022-07-21 16:55:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:37,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:37,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:37,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306367626] [2022-07-21 16:55:37,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306367626] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:37,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528126196] [2022-07-21 16:55:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:37,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:37,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:37,190 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:37,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 16:55:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:37,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 16:55:37,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:37,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:55:37,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:55:37,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:37,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:37,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528126196] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:37,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:37,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2022-07-21 16:55:37,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361199908] [2022-07-21 16:55:37,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:37,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 16:55:37,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:37,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 16:55:37,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-21 16:55:37,653 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:38,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:38,020 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2022-07-21 16:55:38,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:55:38,022 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-21 16:55:38,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:38,023 INFO L225 Difference]: With dead ends: 119 [2022-07-21 16:55:38,023 INFO L226 Difference]: Without dead ends: 119 [2022-07-21 16:55:38,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-07-21 16:55:38,024 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 216 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:38,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 293 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:38,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-21 16:55:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-07-21 16:55:38,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.158878504672897) internal successors, (124), 108 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) [2022-07-21 16:55:38,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2022-07-21 16:55:38,027 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 25 [2022-07-21 16:55:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:38,027 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2022-07-21 16:55:38,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2022-07-21 16:55:38,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 16:55:38,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:38,028 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:38,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:38,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:38,239 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:38,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:38,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1205551803, now seen corresponding path program 2 times [2022-07-21 16:55:38,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:38,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065686675] [2022-07-21 16:55:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:38,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:38,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:38,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065686675] [2022-07-21 16:55:38,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065686675] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:38,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587312539] [2022-07-21 16:55:38,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:55:38,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:38,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:38,415 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:38,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 16:55:38,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:55:38,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:38,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 16:55:38,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:38,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:55:38,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:55:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:38,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:38,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:55:38,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:55:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:38,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587312539] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:38,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:38,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2022-07-21 16:55:38,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744055163] [2022-07-21 16:55:38,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:38,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 16:55:38,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:38,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 16:55:38,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-07-21 16:55:38,900 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:39,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:39,476 INFO L93 Difference]: Finished difference Result 178 states and 195 transitions. [2022-07-21 16:55:39,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 16:55:39,477 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-21 16:55:39,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:39,477 INFO L225 Difference]: With dead ends: 178 [2022-07-21 16:55:39,477 INFO L226 Difference]: Without dead ends: 162 [2022-07-21 16:55:39,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=376, Invalid=1604, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 16:55:39,479 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 226 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:39,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 444 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 280 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-07-21 16:55:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-21 16:55:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 148. [2022-07-21 16:55:39,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 146 states have (on average 1.143835616438356) internal successors, (167), 147 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 167 transitions. [2022-07-21 16:55:39,483 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 167 transitions. Word has length 30 [2022-07-21 16:55:39,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:39,483 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 167 transitions. [2022-07-21 16:55:39,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:39,483 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 167 transitions. [2022-07-21 16:55:39,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-21 16:55:39,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:39,484 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:39,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:39,695 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,SelfDestructingSolverStorable22 [2022-07-21 16:55:39,695 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:39,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:39,696 INFO L85 PathProgramCache]: Analyzing trace with hash -512582047, now seen corresponding path program 2 times [2022-07-21 16:55:39,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:39,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797982199] [2022-07-21 16:55:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:39,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:40,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:40,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797982199] [2022-07-21 16:55:40,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797982199] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:40,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123725708] [2022-07-21 16:55:40,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:55:40,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:40,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:40,026 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:40,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 16:55:40,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:55:40,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:40,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-21 16:55:40,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:40,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:55:40,300 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:40,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-07-21 16:55:40,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2022-07-21 16:55:41,076 INFO L356 Elim1Store]: treesize reduction 31, result has 27.9 percent of original size [2022-07-21 16:55:41,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 25 [2022-07-21 16:55:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:41,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:41,733 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:41,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-07-21 16:55:41,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:55:41,745 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:41,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 65 [2022-07-21 16:55:41,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:55:41,758 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:41,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-07-21 16:55:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:42,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123725708] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:42,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:42,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 55 [2022-07-21 16:55:42,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318399529] [2022-07-21 16:55:42,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:42,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-21 16:55:42,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:42,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-21 16:55:42,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2728, Unknown=0, NotChecked=0, Total=2970 [2022-07-21 16:55:42,105 INFO L87 Difference]: Start difference. First operand 148 states and 167 transitions. Second operand has 55 states, 55 states have (on average 1.509090909090909) internal successors, (83), 55 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:43,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:43,693 INFO L93 Difference]: Finished difference Result 228 states and 251 transitions. [2022-07-21 16:55:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 16:55:43,694 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.509090909090909) internal successors, (83), 55 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-21 16:55:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:43,695 INFO L225 Difference]: With dead ends: 228 [2022-07-21 16:55:43,695 INFO L226 Difference]: Without dead ends: 194 [2022-07-21 16:55:43,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=638, Invalid=5842, Unknown=0, NotChecked=0, Total=6480 [2022-07-21 16:55:43,697 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 145 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:43,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 474 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 478 Invalid, 0 Unknown, 249 Unchecked, 0.2s Time] [2022-07-21 16:55:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-21 16:55:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2022-07-21 16:55:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.1290322580645162) internal successors, (210), 187 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:43,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 210 transitions. [2022-07-21 16:55:43,701 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 210 transitions. Word has length 33 [2022-07-21 16:55:43,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:43,701 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 210 transitions. [2022-07-21 16:55:43,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.509090909090909) internal successors, (83), 55 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:43,702 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 210 transitions. [2022-07-21 16:55:43,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 16:55:43,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:43,702 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:43,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:43,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:43,920 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:43,920 INFO L85 PathProgramCache]: Analyzing trace with hash -740881566, now seen corresponding path program 3 times [2022-07-21 16:55:43,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:43,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330987736] [2022-07-21 16:55:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:43,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:44,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:44,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330987736] [2022-07-21 16:55:44,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330987736] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:44,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753349742] [2022-07-21 16:55:44,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:55:44,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:44,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:44,069 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:44,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 16:55:44,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 16:55:44,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:44,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 16:55:44,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:44,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:44,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:55:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:44,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753349742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:44,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:44,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-07-21 16:55:44,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672814375] [2022-07-21 16:55:44,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:44,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 16:55:44,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:44,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 16:55:44,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-07-21 16:55:44,509 INFO L87 Difference]: Start difference. First operand 188 states and 210 transitions. Second operand has 26 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:45,075 INFO L93 Difference]: Finished difference Result 223 states and 245 transitions. [2022-07-21 16:55:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 16:55:45,075 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 26 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 34 [2022-07-21 16:55:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:45,076 INFO L225 Difference]: With dead ends: 223 [2022-07-21 16:55:45,076 INFO L226 Difference]: Without dead ends: 223 [2022-07-21 16:55:45,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=1139, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 16:55:45,077 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 252 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:45,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 366 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:55:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-21 16:55:45,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 203. [2022-07-21 16:55:45,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 201 states have (on average 1.1293532338308458) internal successors, (227), 202 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 227 transitions. [2022-07-21 16:55:45,081 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 227 transitions. Word has length 34 [2022-07-21 16:55:45,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:45,082 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 227 transitions. [2022-07-21 16:55:45,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:45,082 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 227 transitions. [2022-07-21 16:55:45,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 16:55:45,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:45,082 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:45,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:45,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:45,283 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:45,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:45,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1700374044, now seen corresponding path program 3 times [2022-07-21 16:55:45,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:45,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866385999] [2022-07-21 16:55:45,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:45,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:45,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:45,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866385999] [2022-07-21 16:55:45,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866385999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:45,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737077062] [2022-07-21 16:55:45,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:55:45,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:45,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:45,410 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:45,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 16:55:45,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 16:55:45,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:45,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 16:55:45,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:45,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:45,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:55:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:45,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737077062] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:45,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:45,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-07-21 16:55:45,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395237127] [2022-07-21 16:55:45,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:45,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 16:55:45,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:45,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 16:55:45,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-07-21 16:55:45,818 INFO L87 Difference]: Start difference. First operand 203 states and 227 transitions. Second operand has 23 states, 22 states have (on average 3.409090909090909) internal successors, (75), 23 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) [2022-07-21 16:55:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:46,255 INFO L93 Difference]: Finished difference Result 306 states and 340 transitions. [2022-07-21 16:55:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 16:55:46,256 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.409090909090909) internal successors, (75), 23 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 37 [2022-07-21 16:55:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:46,257 INFO L225 Difference]: With dead ends: 306 [2022-07-21 16:55:46,257 INFO L226 Difference]: Without dead ends: 306 [2022-07-21 16:55:46,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 16:55:46,258 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 230 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:46,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 593 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:55:46,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-21 16:55:46,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 244. [2022-07-21 16:55:46,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 242 states have (on average 1.128099173553719) internal successors, (273), 243 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 273 transitions. [2022-07-21 16:55:46,264 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 273 transitions. Word has length 37 [2022-07-21 16:55:46,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:46,265 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 273 transitions. [2022-07-21 16:55:46,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.409090909090909) internal successors, (75), 23 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) [2022-07-21 16:55:46,265 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 273 transitions. [2022-07-21 16:55:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 16:55:46,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:46,266 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:46,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:46,475 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,SelfDestructingSolverStorable25 [2022-07-21 16:55:46,476 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:46,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:46,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1745665110, now seen corresponding path program 4 times [2022-07-21 16:55:46,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:46,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528011454] [2022-07-21 16:55:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:46,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:46,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:46,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528011454] [2022-07-21 16:55:46,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528011454] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:46,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048089151] [2022-07-21 16:55:46,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:55:46,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:46,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:46,652 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:46,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 16:55:46,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:55:46,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:46,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 16:55:46,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:46,752 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:46,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:46,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 16:55:47,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:55:47,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-21 16:55:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:47,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:47,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-07-21 16:55:47,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-21 16:55:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:47,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048089151] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:47,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:47,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2022-07-21 16:55:47,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128976183] [2022-07-21 16:55:47,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:47,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 16:55:47,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:47,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 16:55:47,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1497, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 16:55:47,837 INFO L87 Difference]: Start difference. First operand 244 states and 273 transitions. Second operand has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:48,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:48,500 INFO L93 Difference]: Finished difference Result 347 states and 381 transitions. [2022-07-21 16:55:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 16:55:48,501 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-21 16:55:48,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:48,503 INFO L225 Difference]: With dead ends: 347 [2022-07-21 16:55:48,503 INFO L226 Difference]: Without dead ends: 326 [2022-07-21 16:55:48,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=399, Invalid=3383, Unknown=0, NotChecked=0, Total=3782 [2022-07-21 16:55:48,504 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 132 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:48,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 604 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 302 Invalid, 0 Unknown, 169 Unchecked, 0.1s Time] [2022-07-21 16:55:48,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-21 16:55:48,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 298. [2022-07-21 16:55:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 296 states have (on average 1.1216216216216217) internal successors, (332), 297 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 332 transitions. [2022-07-21 16:55:48,512 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 332 transitions. Word has length 39 [2022-07-21 16:55:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:48,512 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 332 transitions. [2022-07-21 16:55:48,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 332 transitions. [2022-07-21 16:55:48,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 16:55:48,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:48,513 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:48,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:48,737 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,SelfDestructingSolverStorable26 [2022-07-21 16:55:48,737 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:48,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2029158230, now seen corresponding path program 1 times [2022-07-21 16:55:48,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:48,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44345649] [2022-07-21 16:55:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:48,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:48,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:48,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44345649] [2022-07-21 16:55:48,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44345649] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:48,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494764734] [2022-07-21 16:55:48,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:48,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:48,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:48,827 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:48,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 16:55:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:48,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 16:55:48,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:48,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 16:55:49,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-21 16:55:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:49,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:49,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494764734] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:49,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:49,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 24 [2022-07-21 16:55:49,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907560360] [2022-07-21 16:55:49,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:49,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 16:55:49,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:49,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 16:55:49,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-07-21 16:55:49,213 INFO L87 Difference]: Start difference. First operand 298 states and 332 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:49,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:49,550 INFO L93 Difference]: Finished difference Result 335 states and 370 transitions. [2022-07-21 16:55:49,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 16:55:49,551 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-21 16:55:49,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:49,552 INFO L225 Difference]: With dead ends: 335 [2022-07-21 16:55:49,552 INFO L226 Difference]: Without dead ends: 335 [2022-07-21 16:55:49,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=1197, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 16:55:49,553 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 102 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:49,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 394 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-07-21 16:55:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 318. [2022-07-21 16:55:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 316 states have (on average 1.120253164556962) internal successors, (354), 317 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:49,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 354 transitions. [2022-07-21 16:55:49,560 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 354 transitions. Word has length 42 [2022-07-21 16:55:49,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:49,561 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 354 transitions. [2022-07-21 16:55:49,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:49,562 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 354 transitions. [2022-07-21 16:55:49,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 16:55:49,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:49,563 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:49,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:49,775 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,SelfDestructingSolverStorable27 [2022-07-21 16:55:49,776 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:49,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:49,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1633943257, now seen corresponding path program 5 times [2022-07-21 16:55:49,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:49,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781849786] [2022-07-21 16:55:49,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:49,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:49,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:49,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781849786] [2022-07-21 16:55:49,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781849786] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:49,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616392347] [2022-07-21 16:55:49,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:55:49,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:49,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:49,960 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:49,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 16:55:50,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 16:55:50,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:50,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 16:55:50,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:50,060 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:50,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:50,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:50,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616392347] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:50,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:50,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-07-21 16:55:50,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438541016] [2022-07-21 16:55:50,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:50,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 16:55:50,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:50,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 16:55:50,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-07-21 16:55:50,652 INFO L87 Difference]: Start difference. First operand 318 states and 354 transitions. Second operand has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 32 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) [2022-07-21 16:55:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:51,266 INFO L93 Difference]: Finished difference Result 429 states and 473 transitions. [2022-07-21 16:55:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 16:55:51,266 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 32 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) Word has length 43 [2022-07-21 16:55:51,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:51,267 INFO L225 Difference]: With dead ends: 429 [2022-07-21 16:55:51,267 INFO L226 Difference]: Without dead ends: 429 [2022-07-21 16:55:51,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=445, Invalid=1811, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 16:55:51,269 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 260 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:51,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 487 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 16:55:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-07-21 16:55:51,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 398. [2022-07-21 16:55:51,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 396 states have (on average 1.128787878787879) internal successors, (447), 397 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 447 transitions. [2022-07-21 16:55:51,276 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 447 transitions. Word has length 43 [2022-07-21 16:55:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:51,276 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 447 transitions. [2022-07-21 16:55:51,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 32 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) [2022-07-21 16:55:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 447 transitions. [2022-07-21 16:55:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 16:55:51,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:51,277 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:51,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:51,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-21 16:55:51,491 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:51,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:51,492 INFO L85 PathProgramCache]: Analyzing trace with hash -609642832, now seen corresponding path program 4 times [2022-07-21 16:55:51,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:51,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949358656] [2022-07-21 16:55:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:51,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:51,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:51,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949358656] [2022-07-21 16:55:51,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949358656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:51,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917122958] [2022-07-21 16:55:51,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:55:51,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:51,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:51,914 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:51,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 16:55:51,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:55:51,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:51,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-21 16:55:51,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:52,006 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:52,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:52,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:52,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 16:55:52,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:55:52,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:55:52,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-21 16:55:52,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:55:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:52,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:53,047 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:53,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-21 16:55:53,052 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:53,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-21 16:55:53,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 16:55:53,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:55:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:53,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917122958] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:53,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:53,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 43 [2022-07-21 16:55:53,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415484091] [2022-07-21 16:55:53,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:53,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 16:55:53,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:53,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 16:55:53,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1653, Unknown=20, NotChecked=0, Total=1806 [2022-07-21 16:55:53,477 INFO L87 Difference]: Start difference. First operand 398 states and 447 transitions. Second operand has 43 states, 43 states have (on average 2.5813953488372094) internal successors, (111), 43 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:54,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:54,477 INFO L93 Difference]: Finished difference Result 752 states and 838 transitions. [2022-07-21 16:55:54,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 16:55:54,478 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.5813953488372094) internal successors, (111), 43 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-21 16:55:54,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:54,480 INFO L225 Difference]: With dead ends: 752 [2022-07-21 16:55:54,480 INFO L226 Difference]: Without dead ends: 723 [2022-07-21 16:55:54,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=431, Invalid=4519, Unknown=20, NotChecked=0, Total=4970 [2022-07-21 16:55:54,482 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 116 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:54,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 857 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 357 Invalid, 0 Unknown, 134 Unchecked, 0.2s Time] [2022-07-21 16:55:54,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-07-21 16:55:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 477. [2022-07-21 16:55:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 475 states have (on average 1.128421052631579) internal successors, (536), 476 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 536 transitions. [2022-07-21 16:55:54,492 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 536 transitions. Word has length 45 [2022-07-21 16:55:54,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:54,492 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 536 transitions. [2022-07-21 16:55:54,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.5813953488372094) internal successors, (111), 43 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 536 transitions. [2022-07-21 16:55:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 16:55:54,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:54,493 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:54,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:54,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:54,707 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:54,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:54,708 INFO L85 PathProgramCache]: Analyzing trace with hash -317766582, now seen corresponding path program 2 times [2022-07-21 16:55:54,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:54,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898988255] [2022-07-21 16:55:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:54,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 16:55:54,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:54,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898988255] [2022-07-21 16:55:54,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898988255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:54,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261122574] [2022-07-21 16:55:54,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:55:54,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:54,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:54,929 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:54,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 16:55:55,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:55:55,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:55,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 16:55:55,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:55,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:55,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:55:55,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:55:55,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:55:55,381 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:55,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2022-07-21 16:55:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 16:55:55,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:55,540 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_53| Int) (v_ArrVal_465 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_465) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_53| 1)) 0) (not (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_53|)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_53|))) is different from false [2022-07-21 16:55:55,548 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:55,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:55:55,554 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:55,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:55:55,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:55:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 16:55:55,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261122574] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:55,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:55,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2022-07-21 16:55:55,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989912446] [2022-07-21 16:55:55,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:55,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 16:55:55,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:55,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 16:55:55,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=883, Unknown=1, NotChecked=60, Total=1056 [2022-07-21 16:55:55,865 INFO L87 Difference]: Start difference. First operand 477 states and 536 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:56,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:56,202 INFO L93 Difference]: Finished difference Result 576 states and 637 transitions. [2022-07-21 16:55:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 16:55:56,202 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-21 16:55:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:56,204 INFO L225 Difference]: With dead ends: 576 [2022-07-21 16:55:56,204 INFO L226 Difference]: Without dead ends: 547 [2022-07-21 16:55:56,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=1389, Unknown=1, NotChecked=76, Total=1640 [2022-07-21 16:55:56,206 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 103 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:56,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 775 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 323 Invalid, 0 Unknown, 219 Unchecked, 0.1s Time] [2022-07-21 16:55:56,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-07-21 16:55:56,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 502. [2022-07-21 16:55:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 500 states have (on average 1.128) internal successors, (564), 501 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 564 transitions. [2022-07-21 16:55:56,214 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 564 transitions. Word has length 47 [2022-07-21 16:55:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:56,215 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 564 transitions. [2022-07-21 16:55:56,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 564 transitions. [2022-07-21 16:55:56,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 16:55:56,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:56,216 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:56,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:56,431 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,SelfDestructingSolverStorable30 [2022-07-21 16:55:56,431 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:56,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:56,432 INFO L85 PathProgramCache]: Analyzing trace with hash -424649921, now seen corresponding path program 6 times [2022-07-21 16:55:56,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:56,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682037100] [2022-07-21 16:55:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:56,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:56,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:56,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682037100] [2022-07-21 16:55:56,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682037100] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:56,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553629323] [2022-07-21 16:55:56,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:55:56,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:56,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:56,642 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:56,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 16:55:56,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 16:55:56,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:56,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-21 16:55:56,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:56,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:55:56,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:55:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:56,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:57,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:55:57,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:55:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:57,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553629323] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:57,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:57,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 33 [2022-07-21 16:55:57,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618290678] [2022-07-21 16:55:57,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:57,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 16:55:57,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:57,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 16:55:57,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 16:55:57,160 INFO L87 Difference]: Start difference. First operand 502 states and 564 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:57,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:57,977 INFO L93 Difference]: Finished difference Result 755 states and 830 transitions. [2022-07-21 16:55:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 16:55:57,978 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-21 16:55:57,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:57,980 INFO L225 Difference]: With dead ends: 755 [2022-07-21 16:55:57,980 INFO L226 Difference]: Without dead ends: 691 [2022-07-21 16:55:57,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=455, Invalid=2851, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 16:55:57,982 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 375 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:57,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 1031 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 803 Invalid, 0 Unknown, 109 Unchecked, 0.3s Time] [2022-07-21 16:55:57,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-07-21 16:55:57,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 629. [2022-07-21 16:55:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 627 states have (on average 1.1259968102073366) internal successors, (706), 628 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 706 transitions. [2022-07-21 16:55:58,002 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 706 transitions. Word has length 48 [2022-07-21 16:55:58,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:58,003 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 706 transitions. [2022-07-21 16:55:58,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 706 transitions. [2022-07-21 16:55:58,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 16:55:58,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:58,004 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:58,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:58,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:58,227 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:55:58,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash 589899187, now seen corresponding path program 5 times [2022-07-21 16:55:58,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:58,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722278556] [2022-07-21 16:55:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:58,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:58,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:58,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722278556] [2022-07-21 16:55:58,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722278556] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:58,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827735305] [2022-07-21 16:55:58,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:55:58,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:58,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:58,392 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:58,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 16:55:58,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 16:55:58,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:58,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-21 16:55:58,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:58,518 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:58,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:58,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:55:58,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:55:58,862 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:58,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2022-07-21 16:55:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:59,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:59,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-07-21 16:55:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:59,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827735305] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:59,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:59,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 41 [2022-07-21 16:55:59,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175022419] [2022-07-21 16:55:59,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:59,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 16:55:59,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:59,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 16:55:59,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2022-07-21 16:55:59,710 INFO L87 Difference]: Start difference. First operand 629 states and 706 transitions. Second operand has 42 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 42 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:00,745 INFO L93 Difference]: Finished difference Result 922 states and 1025 transitions. [2022-07-21 16:56:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 16:56:00,746 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 42 states have internal predecessors, (140), 0 states have call successors, (0), 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 49 [2022-07-21 16:56:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:00,748 INFO L225 Difference]: With dead ends: 922 [2022-07-21 16:56:00,749 INFO L226 Difference]: Without dead ends: 922 [2022-07-21 16:56:00,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=369, Invalid=3291, Unknown=0, NotChecked=0, Total=3660 [2022-07-21 16:56:00,750 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 178 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:00,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 975 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 979 Invalid, 0 Unknown, 52 Unchecked, 0.4s Time] [2022-07-21 16:56:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-07-21 16:56:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 760. [2022-07-21 16:56:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 758 states have (on average 1.1226912928759893) internal successors, (851), 759 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:00,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 851 transitions. [2022-07-21 16:56:00,763 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 851 transitions. Word has length 49 [2022-07-21 16:56:00,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:00,763 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 851 transitions. [2022-07-21 16:56:00,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 42 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:00,764 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 851 transitions. [2022-07-21 16:56:00,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 16:56:00,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:00,765 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:00,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:00,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:00,990 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:00,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:00,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1878539292, now seen corresponding path program 7 times [2022-07-21 16:56:00,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:00,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782439294] [2022-07-21 16:56:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:00,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:01,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:01,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782439294] [2022-07-21 16:56:01,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782439294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:01,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61886943] [2022-07-21 16:56:01,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:56:01,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:01,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:01,180 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:01,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 16:56:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:01,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 16:56:01,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:01,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:01,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:56:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:01,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61886943] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:01,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:01,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2022-07-21 16:56:01,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638133795] [2022-07-21 16:56:01,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:01,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 16:56:01,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 16:56:01,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 16:56:01,708 INFO L87 Difference]: Start difference. First operand 760 states and 851 transitions. Second operand has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:02,417 INFO L93 Difference]: Finished difference Result 873 states and 964 transitions. [2022-07-21 16:56:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 16:56:02,418 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 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 [2022-07-21 16:56:02,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:02,420 INFO L225 Difference]: With dead ends: 873 [2022-07-21 16:56:02,420 INFO L226 Difference]: Without dead ends: 873 [2022-07-21 16:56:02,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=517, Invalid=2239, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 16:56:02,421 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 438 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:02,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 815 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 16:56:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-07-21 16:56:02,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 790. [2022-07-21 16:56:02,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 788 states have (on average 1.1243654822335025) internal successors, (886), 789 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 886 transitions. [2022-07-21 16:56:02,433 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 886 transitions. Word has length 52 [2022-07-21 16:56:02,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:02,434 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 886 transitions. [2022-07-21 16:56:02,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 886 transitions. [2022-07-21 16:56:02,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 16:56:02,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:02,435 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:02,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:02,654 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,SelfDestructingSolverStorable33 [2022-07-21 16:56:02,654 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:02,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:02,655 INFO L85 PathProgramCache]: Analyzing trace with hash -383640285, now seen corresponding path program 3 times [2022-07-21 16:56:02,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:02,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287615882] [2022-07-21 16:56:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:02,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 16:56:02,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:02,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287615882] [2022-07-21 16:56:02,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287615882] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:02,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494867810] [2022-07-21 16:56:02,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:56:02,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:02,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:02,744 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:02,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 16:56:02,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 16:56:02,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:02,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 16:56:02,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:02,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 16:56:02,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:56:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 16:56:02,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 37 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 16:56:03,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494867810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:03,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:03,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 24 [2022-07-21 16:56:03,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390288856] [2022-07-21 16:56:03,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:03,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 16:56:03,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:03,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 16:56:03,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-07-21 16:56:03,059 INFO L87 Difference]: Start difference. First operand 790 states and 886 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:03,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:03,365 INFO L93 Difference]: Finished difference Result 837 states and 912 transitions. [2022-07-21 16:56:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 16:56:03,365 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-21 16:56:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:03,367 INFO L225 Difference]: With dead ends: 837 [2022-07-21 16:56:03,367 INFO L226 Difference]: Without dead ends: 773 [2022-07-21 16:56:03,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 16:56:03,368 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:03,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 343 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:56:03,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-07-21 16:56:03,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 630. [2022-07-21 16:56:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 628 states have (on average 1.1178343949044587) internal successors, (702), 629 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:03,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 702 transitions. [2022-07-21 16:56:03,379 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 702 transitions. Word has length 54 [2022-07-21 16:56:03,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:03,379 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 702 transitions. [2022-07-21 16:56:03,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:03,380 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 702 transitions. [2022-07-21 16:56:03,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 16:56:03,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:03,381 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:03,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:03,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:03,595 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:03,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:03,596 INFO L85 PathProgramCache]: Analyzing trace with hash 52758665, now seen corresponding path program 1 times [2022-07-21 16:56:03,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:03,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493337906] [2022-07-21 16:56:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:03,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 16:56:03,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:03,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493337906] [2022-07-21 16:56:03,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493337906] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:03,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83759173] [2022-07-21 16:56:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:03,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:03,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:03,983 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:03,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 16:56:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:04,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-21 16:56:04,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:04,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:56:04,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:56:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 16:56:04,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:04,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:56:04,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:56:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 16:56:04,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83759173] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:04,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:04,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 34 [2022-07-21 16:56:04,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833636632] [2022-07-21 16:56:04,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:04,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 16:56:04,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:04,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 16:56:04,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 16:56:04,549 INFO L87 Difference]: Start difference. First operand 630 states and 702 transitions. Second operand has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:06,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:06,544 INFO L93 Difference]: Finished difference Result 795 states and 858 transitions. [2022-07-21 16:56:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-21 16:56:06,544 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-21 16:56:06,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:06,546 INFO L225 Difference]: With dead ends: 795 [2022-07-21 16:56:06,546 INFO L226 Difference]: Without dead ends: 753 [2022-07-21 16:56:06,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=769, Invalid=5237, Unknown=0, NotChecked=0, Total=6006 [2022-07-21 16:56:06,548 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 385 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:06,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1271 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 928 Invalid, 0 Unknown, 412 Unchecked, 0.4s Time] [2022-07-21 16:56:06,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-07-21 16:56:06,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 582. [2022-07-21 16:56:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 580 states have (on average 1.1120689655172413) internal successors, (645), 581 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 645 transitions. [2022-07-21 16:56:06,557 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 645 transitions. Word has length 56 [2022-07-21 16:56:06,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:06,557 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 645 transitions. [2022-07-21 16:56:06,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:06,558 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 645 transitions. [2022-07-21 16:56:06,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 16:56:06,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:06,559 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:06,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-21 16:56:06,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:06,771 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:06,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:06,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1586425820, now seen corresponding path program 8 times [2022-07-21 16:56:06,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:06,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34924863] [2022-07-21 16:56:06,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:06,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:06,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:06,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34924863] [2022-07-21 16:56:06,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34924863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:06,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841756175] [2022-07-21 16:56:06,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:56:06,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:06,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:06,990 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:06,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 16:56:07,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:56:07,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:07,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-21 16:56:07,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:07,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:56:07,650 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:07,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-21 16:56:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:07,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:08,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:56:08,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:56:08,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-07-21 16:56:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:08,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841756175] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:08,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:08,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 52 [2022-07-21 16:56:08,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383249234] [2022-07-21 16:56:08,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:08,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 16:56:08,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:08,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 16:56:08,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2463, Unknown=0, NotChecked=0, Total=2652 [2022-07-21 16:56:08,469 INFO L87 Difference]: Start difference. First operand 582 states and 645 transitions. Second operand has 52 states, 52 states have (on average 2.730769230769231) internal successors, (142), 52 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:10,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:10,766 INFO L93 Difference]: Finished difference Result 1006 states and 1088 transitions. [2022-07-21 16:56:10,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-21 16:56:10,766 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.730769230769231) internal successors, (142), 52 states have internal predecessors, (142), 0 states have call successors, (0), 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 57 [2022-07-21 16:56:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:10,768 INFO L225 Difference]: With dead ends: 1006 [2022-07-21 16:56:10,768 INFO L226 Difference]: Without dead ends: 975 [2022-07-21 16:56:10,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=584, Invalid=7426, Unknown=0, NotChecked=0, Total=8010 [2022-07-21 16:56:10,769 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 378 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 763 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:10,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 2240 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1537 Invalid, 0 Unknown, 763 Unchecked, 0.6s Time] [2022-07-21 16:56:10,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-07-21 16:56:10,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 722. [2022-07-21 16:56:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 720 states have (on average 1.1125) internal successors, (801), 721 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 801 transitions. [2022-07-21 16:56:10,782 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 801 transitions. Word has length 57 [2022-07-21 16:56:10,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:10,782 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 801 transitions. [2022-07-21 16:56:10,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.730769230769231) internal successors, (142), 52 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:10,782 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 801 transitions. [2022-07-21 16:56:10,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 16:56:10,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:10,783 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:10,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:10,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:11,000 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:11,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:11,000 INFO L85 PathProgramCache]: Analyzing trace with hash -377019521, now seen corresponding path program 6 times [2022-07-21 16:56:11,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:11,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211293558] [2022-07-21 16:56:11,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:11,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:11,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:11,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211293558] [2022-07-21 16:56:11,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211293558] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:11,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102070154] [2022-07-21 16:56:11,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:56:11,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:11,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:11,274 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:11,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 16:56:11,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 16:56:11,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:11,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-21 16:56:11,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:11,425 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:56:11,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:56:11,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:56:11,700 INFO L356 Elim1Store]: treesize reduction 38, result has 20.8 percent of original size [2022-07-21 16:56:11,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-21 16:56:12,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:56:12,200 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 16:56:12,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 10 [2022-07-21 16:56:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:12,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:12,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2022-07-21 16:56:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:13,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102070154] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:13,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:13,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 18] total 45 [2022-07-21 16:56:13,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795845803] [2022-07-21 16:56:13,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:13,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 16:56:13,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:13,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 16:56:13,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1838, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 16:56:13,043 INFO L87 Difference]: Start difference. First operand 722 states and 801 transitions. Second operand has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 45 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:14,271 INFO L93 Difference]: Finished difference Result 1498 states and 1636 transitions. [2022-07-21 16:56:14,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-21 16:56:14,273 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 45 states have internal predecessors, (148), 0 states have call successors, (0), 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 57 [2022-07-21 16:56:14,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:14,276 INFO L225 Difference]: With dead ends: 1498 [2022-07-21 16:56:14,276 INFO L226 Difference]: Without dead ends: 1206 [2022-07-21 16:56:14,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=346, Invalid=4910, Unknown=0, NotChecked=0, Total=5256 [2022-07-21 16:56:14,277 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 249 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 439 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:14,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 1949 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1114 Invalid, 0 Unknown, 439 Unchecked, 0.4s Time] [2022-07-21 16:56:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2022-07-21 16:56:14,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 859. [2022-07-21 16:56:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 857 states have (on average 1.1143523920653442) internal successors, (955), 858 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 955 transitions. [2022-07-21 16:56:14,289 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 955 transitions. Word has length 57 [2022-07-21 16:56:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:14,289 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 955 transitions. [2022-07-21 16:56:14,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 45 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 955 transitions. [2022-07-21 16:56:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-21 16:56:14,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:14,291 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:14,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:14,511 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,SelfDestructingSolverStorable37 [2022-07-21 16:56:14,511 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:14,512 INFO L85 PathProgramCache]: Analyzing trace with hash -424589822, now seen corresponding path program 7 times [2022-07-21 16:56:14,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:14,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817172024] [2022-07-21 16:56:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:14,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:14,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:14,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817172024] [2022-07-21 16:56:14,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817172024] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:14,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391579400] [2022-07-21 16:56:14,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:56:14,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:14,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:14,712 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:14,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 16:56:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:14,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 16:56:14,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:15,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:15,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:56:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:15,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391579400] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:15,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:15,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-07-21 16:56:15,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979470492] [2022-07-21 16:56:15,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:15,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 16:56:15,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:15,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 16:56:15,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-07-21 16:56:15,327 INFO L87 Difference]: Start difference. First operand 859 states and 955 transitions. Second operand has 31 states, 30 states have (on average 4.1) internal successors, (123), 31 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:15,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:15,952 INFO L93 Difference]: Finished difference Result 1296 states and 1426 transitions. [2022-07-21 16:56:15,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 16:56:15,952 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.1) internal successors, (123), 31 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-21 16:56:15,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:15,955 INFO L225 Difference]: With dead ends: 1296 [2022-07-21 16:56:15,955 INFO L226 Difference]: Without dead ends: 1296 [2022-07-21 16:56:15,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 16:56:15,956 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 339 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:15,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 1115 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 16:56:15,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-07-21 16:56:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 951. [2022-07-21 16:56:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 949 states have (on average 1.1116965226554267) internal successors, (1055), 950 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:15,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1055 transitions. [2022-07-21 16:56:15,969 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1055 transitions. Word has length 61 [2022-07-21 16:56:15,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:15,969 INFO L495 AbstractCegarLoop]: Abstraction has 951 states and 1055 transitions. [2022-07-21 16:56:15,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.1) internal successors, (123), 31 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:15,969 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1055 transitions. [2022-07-21 16:56:15,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 16:56:15,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:15,971 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:15,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:16,191 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,SelfDestructingSolverStorable38 [2022-07-21 16:56:16,191 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:16,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:16,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1914242811, now seen corresponding path program 4 times [2022-07-21 16:56:16,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:16,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31819475] [2022-07-21 16:56:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:16,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 77 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 16:56:16,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:16,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31819475] [2022-07-21 16:56:16,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31819475] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:16,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003821039] [2022-07-21 16:56:16,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:56:16,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:16,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:16,616 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:16,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 16:56:16,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:56:16,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:16,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 126 conjunts are in the unsatisfiable core [2022-07-21 16:56:16,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:16,745 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:56:16,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:56:16,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:56:17,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:56:17,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:56:18,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:56:18,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:56:18,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:56:18,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-07-21 16:56:18,513 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:56:18,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-07-21 16:56:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 16:56:18,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:20,223 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:20,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-07-21 16:56:20,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:56:20,241 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:20,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 65 [2022-07-21 16:56:20,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:56:20,261 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:20,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-07-21 16:56:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 32 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 16:56:21,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003821039] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:21,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:21,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 32, 33] total 75 [2022-07-21 16:56:21,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227674630] [2022-07-21 16:56:21,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:21,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-21 16:56:21,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:21,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-21 16:56:21,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=5034, Unknown=1, NotChecked=0, Total=5550 [2022-07-21 16:56:21,643 INFO L87 Difference]: Start difference. First operand 951 states and 1055 transitions. Second operand has 75 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:26,405 INFO L93 Difference]: Finished difference Result 1199 states and 1311 transitions. [2022-07-21 16:56:26,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-21 16:56:26,406 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.96) internal successors, (147), 75 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 64 [2022-07-21 16:56:26,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:26,408 INFO L225 Difference]: With dead ends: 1199 [2022-07-21 16:56:26,408 INFO L226 Difference]: Without dead ends: 1075 [2022-07-21 16:56:26,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4210 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1683, Invalid=18053, Unknown=4, NotChecked=0, Total=19740 [2022-07-21 16:56:26,410 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 257 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 679 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:26,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 710 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 552 Invalid, 0 Unknown, 679 Unchecked, 0.3s Time] [2022-07-21 16:56:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-07-21 16:56:26,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 974. [2022-07-21 16:56:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 972 states have (on average 1.1080246913580247) internal successors, (1077), 973 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:26,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1077 transitions. [2022-07-21 16:56:26,422 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1077 transitions. Word has length 64 [2022-07-21 16:56:26,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:26,423 INFO L495 AbstractCegarLoop]: Abstraction has 974 states and 1077 transitions. [2022-07-21 16:56:26,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:26,423 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1077 transitions. [2022-07-21 16:56:26,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 16:56:26,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:26,424 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:26,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:26,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-21 16:56:26,639 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:26,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1455608263, now seen corresponding path program 9 times [2022-07-21 16:56:26,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:26,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508780296] [2022-07-21 16:56:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:26,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:26,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:26,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508780296] [2022-07-21 16:56:26,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508780296] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:26,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636670104] [2022-07-21 16:56:26,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:56:26,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:26,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:26,944 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:26,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 16:56:27,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-21 16:56:27,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:27,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-21 16:56:27,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:27,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:56:27,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:56:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:27,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:27,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:56:27,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:56:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:27,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636670104] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:27,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:27,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 39 [2022-07-21 16:56:27,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692633258] [2022-07-21 16:56:27,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:27,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 16:56:27,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:27,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 16:56:27,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 16:56:27,564 INFO L87 Difference]: Start difference. First operand 974 states and 1077 transitions. Second operand has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 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) [2022-07-21 16:56:28,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:28,898 INFO L93 Difference]: Finished difference Result 1937 states and 2122 transitions. [2022-07-21 16:56:28,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 16:56:28,898 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 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) Word has length 66 [2022-07-21 16:56:28,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:28,902 INFO L225 Difference]: With dead ends: 1937 [2022-07-21 16:56:28,902 INFO L226 Difference]: Without dead ends: 1901 [2022-07-21 16:56:28,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=653, Invalid=4459, Unknown=0, NotChecked=0, Total=5112 [2022-07-21 16:56:28,903 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 422 mSDsluCounter, 2351 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 2488 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:28,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 2488 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1874 Invalid, 0 Unknown, 60 Unchecked, 0.6s Time] [2022-07-21 16:56:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2022-07-21 16:56:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1362. [2022-07-21 16:56:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1360 states have (on average 1.1154411764705883) internal successors, (1517), 1361 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1517 transitions. [2022-07-21 16:56:28,932 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1517 transitions. Word has length 66 [2022-07-21 16:56:28,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:28,933 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1517 transitions. [2022-07-21 16:56:28,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 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) [2022-07-21 16:56:28,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1517 transitions. [2022-07-21 16:56:28,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-21 16:56:28,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:28,935 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:28,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:29,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:29,160 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:29,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:29,160 INFO L85 PathProgramCache]: Analyzing trace with hash -200440626, now seen corresponding path program 8 times [2022-07-21 16:56:29,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:29,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717538086] [2022-07-21 16:56:29,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:29,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:29,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:29,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717538086] [2022-07-21 16:56:29,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717538086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:29,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15363624] [2022-07-21 16:56:29,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:56:29,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:29,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:29,677 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:29,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 16:56:29,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:56:29,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:29,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-21 16:56:29,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:29,810 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:56:29,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:56:30,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:56:30,089 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:56:30,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-07-21 16:56:30,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:56:30,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:56:30,569 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:30,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-21 16:56:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:30,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:30,677 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_850 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_850) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 16:56:30,682 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:30,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:56:30,688 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:30,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:56:30,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:56:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:31,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15363624] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:31,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:31,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 52 [2022-07-21 16:56:31,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867557187] [2022-07-21 16:56:31,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:31,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 16:56:31,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:31,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 16:56:31,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2415, Unknown=1, NotChecked=98, Total=2652 [2022-07-21 16:56:31,255 INFO L87 Difference]: Start difference. First operand 1362 states and 1517 transitions. Second operand has 52 states, 52 states have (on average 3.0384615384615383) internal successors, (158), 52 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:32,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:32,597 INFO L93 Difference]: Finished difference Result 2623 states and 2889 transitions. [2022-07-21 16:56:32,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-21 16:56:32,597 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0384615384615383) internal successors, (158), 52 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-21 16:56:32,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:32,601 INFO L225 Difference]: With dead ends: 2623 [2022-07-21 16:56:32,601 INFO L226 Difference]: Without dead ends: 2259 [2022-07-21 16:56:32,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=305, Invalid=5247, Unknown=2, NotChecked=146, Total=5700 [2022-07-21 16:56:32,602 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 242 mSDsluCounter, 3475 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 3605 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 928 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:32,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 3605 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1402 Invalid, 0 Unknown, 928 Unchecked, 0.5s Time] [2022-07-21 16:56:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2022-07-21 16:56:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1539. [2022-07-21 16:56:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1537 states have (on average 1.1164606376057253) internal successors, (1716), 1538 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:32,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 1716 transitions. [2022-07-21 16:56:32,627 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 1716 transitions. Word has length 69 [2022-07-21 16:56:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:32,627 INFO L495 AbstractCegarLoop]: Abstraction has 1539 states and 1716 transitions. [2022-07-21 16:56:32,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0384615384615383) internal successors, (158), 52 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:32,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 1716 transitions. [2022-07-21 16:56:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 16:56:32,629 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:32,629 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:32,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:32,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:32,847 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:32,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:32,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1335660074, now seen corresponding path program 10 times [2022-07-21 16:56:32,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:32,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348997381] [2022-07-21 16:56:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:32,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:33,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:33,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348997381] [2022-07-21 16:56:33,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348997381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:33,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308602912] [2022-07-21 16:56:33,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:56:33,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:33,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:33,103 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:33,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 16:56:33,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:56:33,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:33,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-21 16:56:33,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:33,209 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:56:33,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:56:33,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-21 16:56:33,717 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:33,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-21 16:56:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 50 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:33,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:34,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:56:34,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:56:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 66 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:35,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308602912] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:35,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:35,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 23] total 58 [2022-07-21 16:56:35,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091667440] [2022-07-21 16:56:35,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:35,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-21 16:56:35,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:35,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-21 16:56:35,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=3081, Unknown=0, NotChecked=0, Total=3422 [2022-07-21 16:56:35,226 INFO L87 Difference]: Start difference. First operand 1539 states and 1716 transitions. Second operand has 59 states, 58 states have (on average 3.1724137931034484) internal successors, (184), 59 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:38,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:38,795 INFO L93 Difference]: Finished difference Result 2279 states and 2510 transitions. [2022-07-21 16:56:38,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-21 16:56:38,795 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.1724137931034484) internal successors, (184), 59 states have internal predecessors, (184), 0 states have call successors, (0), 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 70 [2022-07-21 16:56:38,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:38,800 INFO L225 Difference]: With dead ends: 2279 [2022-07-21 16:56:38,800 INFO L226 Difference]: Without dead ends: 2279 [2022-07-21 16:56:38,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2383, Invalid=11189, Unknown=0, NotChecked=0, Total=13572 [2022-07-21 16:56:38,801 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 780 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 2191 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 2575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:38,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 1717 Invalid, 2575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2191 Invalid, 0 Unknown, 302 Unchecked, 0.9s Time] [2022-07-21 16:56:38,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2022-07-21 16:56:38,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 1599. [2022-07-21 16:56:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1597 states have (on average 1.1183469004383217) internal successors, (1786), 1598 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 1786 transitions. [2022-07-21 16:56:38,817 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 1786 transitions. Word has length 70 [2022-07-21 16:56:38,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:38,817 INFO L495 AbstractCegarLoop]: Abstraction has 1599 states and 1786 transitions. [2022-07-21 16:56:38,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.1724137931034484) internal successors, (184), 59 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:38,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 1786 transitions. [2022-07-21 16:56:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-21 16:56:38,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:38,819 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:38,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-21 16:56:39,019 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,SelfDestructingSolverStorable42 [2022-07-21 16:56:39,020 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:39,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:39,020 INFO L85 PathProgramCache]: Analyzing trace with hash -165610799, now seen corresponding path program 9 times [2022-07-21 16:56:39,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:39,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112063950] [2022-07-21 16:56:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:39,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:39,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:39,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112063950] [2022-07-21 16:56:39,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112063950] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:39,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391169983] [2022-07-21 16:56:39,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:56:39,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:39,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:39,237 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:39,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 16:56:39,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 16:56:39,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:39,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-21 16:56:39,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:39,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:39,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-21 16:56:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:40,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391169983] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:40,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:40,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2022-07-21 16:56:40,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5374474] [2022-07-21 16:56:40,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:40,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 16:56:40,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:40,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 16:56:40,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 16:56:40,030 INFO L87 Difference]: Start difference. First operand 1599 states and 1786 transitions. Second operand has 41 states, 40 states have (on average 4.675) internal successors, (187), 41 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:40,885 INFO L93 Difference]: Finished difference Result 2443 states and 2712 transitions. [2022-07-21 16:56:40,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 16:56:40,886 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.675) internal successors, (187), 41 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-21 16:56:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:40,890 INFO L225 Difference]: With dead ends: 2443 [2022-07-21 16:56:40,890 INFO L226 Difference]: Without dead ends: 2443 [2022-07-21 16:56:40,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=678, Invalid=2982, Unknown=0, NotChecked=0, Total=3660 [2022-07-21 16:56:40,891 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 479 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:40,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 1460 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 16:56:40,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2022-07-21 16:56:40,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 1724. [2022-07-21 16:56:40,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1722 states have (on average 1.1173054587688733) internal successors, (1924), 1723 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 1924 transitions. [2022-07-21 16:56:40,915 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 1924 transitions. Word has length 73 [2022-07-21 16:56:40,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:40,915 INFO L495 AbstractCegarLoop]: Abstraction has 1724 states and 1924 transitions. [2022-07-21 16:56:40,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.675) internal successors, (187), 41 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 1924 transitions. [2022-07-21 16:56:40,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-21 16:56:40,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:40,918 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:40,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-21 16:56:41,139 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,SelfDestructingSolverStorable43 [2022-07-21 16:56:41,139 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:41,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:41,140 INFO L85 PathProgramCache]: Analyzing trace with hash 439135196, now seen corresponding path program 5 times [2022-07-21 16:56:41,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:41,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831507062] [2022-07-21 16:56:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:41,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 63 proven. 50 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 16:56:41,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:41,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831507062] [2022-07-21 16:56:41,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831507062] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:41,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833764081] [2022-07-21 16:56:41,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:56:41,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:41,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:41,336 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:41,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 16:56:41,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 16:56:41,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:41,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 16:56:41,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:41,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-21 16:56:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 63 proven. 50 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 16:56:41,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:41,632 INFO L356 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2022-07-21 16:56:41,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2022-07-21 16:56:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 47 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 16:56:41,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833764081] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:41,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:41,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 26 [2022-07-21 16:56:41,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775927792] [2022-07-21 16:56:41,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:41,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 16:56:41,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:41,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 16:56:41,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-07-21 16:56:41,665 INFO L87 Difference]: Start difference. First operand 1724 states and 1924 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:42,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:42,226 INFO L93 Difference]: Finished difference Result 2135 states and 2340 transitions. [2022-07-21 16:56:42,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 16:56:42,226 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-21 16:56:42,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:42,230 INFO L225 Difference]: With dead ends: 2135 [2022-07-21 16:56:42,230 INFO L226 Difference]: Without dead ends: 2135 [2022-07-21 16:56:42,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=2070, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 16:56:42,230 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 107 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:42,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 596 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:56:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2022-07-21 16:56:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 2054. [2022-07-21 16:56:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2052 states have (on average 1.101364522417154) internal successors, (2260), 2053 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 2260 transitions. [2022-07-21 16:56:42,247 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 2260 transitions. Word has length 73 [2022-07-21 16:56:42,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:42,247 INFO L495 AbstractCegarLoop]: Abstraction has 2054 states and 2260 transitions. [2022-07-21 16:56:42,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:42,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 2260 transitions. [2022-07-21 16:56:42,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 16:56:42,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:42,250 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:42,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:42,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:42,463 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:42,464 INFO L85 PathProgramCache]: Analyzing trace with hash 88870659, now seen corresponding path program 2 times [2022-07-21 16:56:42,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:42,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380295920] [2022-07-21 16:56:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:42,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 71 proven. 30 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-21 16:56:42,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:42,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380295920] [2022-07-21 16:56:42,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380295920] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:42,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71501032] [2022-07-21 16:56:42,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:56:42,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:42,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:42,709 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:42,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 16:56:42,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:56:42,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:42,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-21 16:56:42,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:42,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 16:56:42,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:56:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 71 proven. 43 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-21 16:56:42,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 71 proven. 30 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-21 16:56:43,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71501032] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:43,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:43,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 13] total 27 [2022-07-21 16:56:43,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141110067] [2022-07-21 16:56:43,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:43,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 16:56:43,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:43,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 16:56:43,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-07-21 16:56:43,176 INFO L87 Difference]: Start difference. First operand 2054 states and 2260 transitions. Second operand has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:43,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:43,893 INFO L93 Difference]: Finished difference Result 2164 states and 2341 transitions. [2022-07-21 16:56:43,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 16:56:43,893 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 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 74 [2022-07-21 16:56:43,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:43,897 INFO L225 Difference]: With dead ends: 2164 [2022-07-21 16:56:43,897 INFO L226 Difference]: Without dead ends: 2060 [2022-07-21 16:56:43,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=470, Invalid=2610, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 16:56:43,898 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 147 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:43,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 450 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:56:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-07-21 16:56:43,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1713. [2022-07-21 16:56:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1711 states have (on average 1.09760374050263) internal successors, (1878), 1712 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 1878 transitions. [2022-07-21 16:56:43,911 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 1878 transitions. Word has length 74 [2022-07-21 16:56:43,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:43,911 INFO L495 AbstractCegarLoop]: Abstraction has 1713 states and 1878 transitions. [2022-07-21 16:56:43,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 1878 transitions. [2022-07-21 16:56:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 16:56:43,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:43,914 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:43,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-21 16:56:44,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:44,127 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:44,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:44,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1207961453, now seen corresponding path program 3 times [2022-07-21 16:56:44,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:44,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235427667] [2022-07-21 16:56:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:44,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 75 proven. 76 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-21 16:56:44,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:44,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235427667] [2022-07-21 16:56:44,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235427667] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:44,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577921878] [2022-07-21 16:56:44,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:56:44,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:44,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:44,367 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:44,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-21 16:56:44,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 16:56:44,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:44,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-21 16:56:44,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:44,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:56:44,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:56:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 153 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 16:56:44,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:45,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:56:45,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:56:45,222 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 153 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 16:56:45,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577921878] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:45,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:45,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 41 [2022-07-21 16:56:45,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397902234] [2022-07-21 16:56:45,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:45,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 16:56:45,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:45,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 16:56:45,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 16:56:45,224 INFO L87 Difference]: Start difference. First operand 1713 states and 1878 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:50,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:50,512 INFO L93 Difference]: Finished difference Result 3261 states and 3439 transitions. [2022-07-21 16:56:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-07-21 16:56:50,512 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 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 79 [2022-07-21 16:56:50,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:50,518 INFO L225 Difference]: With dead ends: 3261 [2022-07-21 16:56:50,518 INFO L226 Difference]: Without dead ends: 2792 [2022-07-21 16:56:50,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 137 SyntacticMatches, 7 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 17847 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2398, Invalid=44908, Unknown=0, NotChecked=0, Total=47306 [2022-07-21 16:56:50,522 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 748 mSDsluCounter, 2896 mSDsCounter, 0 mSdLazyCounter, 3384 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 3037 SdHoareTripleChecker+Invalid, 4484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 3384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 931 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:50,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 3037 Invalid, 4484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 3384 Invalid, 0 Unknown, 931 Unchecked, 1.1s Time] [2022-07-21 16:56:50,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2022-07-21 16:56:50,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 1749. [2022-07-21 16:56:50,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1747 states have (on average 1.090440755580996) internal successors, (1905), 1748 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 1905 transitions. [2022-07-21 16:56:50,549 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 1905 transitions. Word has length 79 [2022-07-21 16:56:50,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:50,549 INFO L495 AbstractCegarLoop]: Abstraction has 1749 states and 1905 transitions. [2022-07-21 16:56:50,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 1905 transitions. [2022-07-21 16:56:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 16:56:50,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:50,551 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:50,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:50,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:50,762 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:50,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1453943126, now seen corresponding path program 11 times [2022-07-21 16:56:50,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:50,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713246022] [2022-07-21 16:56:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:50,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 136 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:51,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:51,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713246022] [2022-07-21 16:56:51,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713246022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:51,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812207212] [2022-07-21 16:56:51,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:56:51,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:51,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:51,011 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:51,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-21 16:56:51,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-21 16:56:51,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:51,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-21 16:56:51,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:51,145 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:56:51,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:56:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 149 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:51,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 149 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:52,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812207212] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:52,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:52,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 52 [2022-07-21 16:56:52,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579461683] [2022-07-21 16:56:52,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:52,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 16:56:52,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:52,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 16:56:52,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2278, Unknown=0, NotChecked=0, Total=2652 [2022-07-21 16:56:52,019 INFO L87 Difference]: Start difference. First operand 1749 states and 1905 transitions. Second operand has 52 states, 52 states have (on average 3.5961538461538463) internal successors, (187), 52 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:54,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:54,167 INFO L93 Difference]: Finished difference Result 3770 states and 3998 transitions. [2022-07-21 16:56:54,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-21 16:56:54,168 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.5961538461538463) internal successors, (187), 52 states have internal predecessors, (187), 0 states have call successors, (0), 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 [2022-07-21 16:56:54,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:54,173 INFO L225 Difference]: With dead ends: 3770 [2022-07-21 16:56:54,173 INFO L226 Difference]: Without dead ends: 3717 [2022-07-21 16:56:54,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3058, Invalid=10282, Unknown=0, NotChecked=0, Total=13340 [2022-07-21 16:56:54,175 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 1167 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:54,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1167 Valid, 879 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 16:56:54,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3717 states. [2022-07-21 16:56:54,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3717 to 2319. [2022-07-21 16:56:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2317 states have (on average 1.1027190332326284) internal successors, (2555), 2318 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 2555 transitions. [2022-07-21 16:56:54,197 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 2555 transitions. Word has length 80 [2022-07-21 16:56:54,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:54,197 INFO L495 AbstractCegarLoop]: Abstraction has 2319 states and 2555 transitions. [2022-07-21 16:56:54,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.5961538461538463) internal successors, (187), 52 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:54,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 2555 transitions. [2022-07-21 16:56:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-21 16:56:54,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:54,200 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:54,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:54,415 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,SelfDestructingSolverStorable47 [2022-07-21 16:56:54,415 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:56:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:54,416 INFO L85 PathProgramCache]: Analyzing trace with hash 635370141, now seen corresponding path program 10 times [2022-07-21 16:56:54,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:54,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907708491] [2022-07-21 16:56:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:54,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:54,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:54,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907708491] [2022-07-21 16:56:54,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907708491] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:54,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173078767] [2022-07-21 16:56:54,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:56:54,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:54,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:54,955 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:54,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-21 16:56:55,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:56:55,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:55,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-21 16:56:55,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:55,102 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:56:55,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:56:55,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 16:56:55,533 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:56:55,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-21 16:56:55,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-21 16:56:59,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:56:59,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-21 16:56:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 94 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:59,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:00,034 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:00,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-21 16:57:00,039 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:00,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-21 16:57:00,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 16:57:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 88 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:00,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173078767] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:00,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:00,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24, 24] total 65 [2022-07-21 16:57:00,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668494913] [2022-07-21 16:57:00,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:00,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-21 16:57:00,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:00,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-21 16:57:00,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=3870, Unknown=9, NotChecked=0, Total=4160 [2022-07-21 16:57:00,784 INFO L87 Difference]: Start difference. First operand 2319 states and 2555 transitions. Second operand has 65 states, 65 states have (on average 3.4) internal successors, (221), 65 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) [2022-07-21 16:57:04,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:04,705 INFO L93 Difference]: Finished difference Result 4842 states and 5320 transitions. [2022-07-21 16:57:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-21 16:57:04,706 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.4) internal successors, (221), 65 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) Word has length 81 [2022-07-21 16:57:04,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:04,711 INFO L225 Difference]: With dead ends: 4842 [2022-07-21 16:57:04,711 INFO L226 Difference]: Without dead ends: 4231 [2022-07-21 16:57:04,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3796 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1093, Invalid=16720, Unknown=9, NotChecked=0, Total=17822 [2022-07-21 16:57:04,712 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 450 mSDsluCounter, 2721 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 2798 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 965 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:04,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 2798 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1146 Invalid, 0 Unknown, 965 Unchecked, 0.4s Time] [2022-07-21 16:57:04,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2022-07-21 16:57:04,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 3325. [2022-07-21 16:57:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3325 states, 3323 states have (on average 1.1065302437556426) internal successors, (3677), 3324 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3325 states to 3325 states and 3677 transitions. [2022-07-21 16:57:04,741 INFO L78 Accepts]: Start accepts. Automaton has 3325 states and 3677 transitions. Word has length 81 [2022-07-21 16:57:04,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:04,741 INFO L495 AbstractCegarLoop]: Abstraction has 3325 states and 3677 transitions. [2022-07-21 16:57:04,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.4) internal successors, (221), 65 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) [2022-07-21 16:57:04,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3325 states and 3677 transitions. [2022-07-21 16:57:04,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 16:57:04,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:04,745 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:04,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:04,959 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,SelfDestructingSolverStorable48 [2022-07-21 16:57:04,959 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:57:04,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:04,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1147439476, now seen corresponding path program 6 times [2022-07-21 16:57:04,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:04,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479899501] [2022-07-21 16:57:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:04,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 6 proven. 152 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-21 16:57:05,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:05,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479899501] [2022-07-21 16:57:05,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479899501] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:05,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593564479] [2022-07-21 16:57:05,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:57:05,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:05,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:05,172 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:05,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-21 16:57:05,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-21 16:57:05,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:05,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 155 conjunts are in the unsatisfiable core [2022-07-21 16:57:05,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:05,355 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:05,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:57:05,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:05,821 INFO L356 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2022-07-21 16:57:05,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-21 16:57:07,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:07,028 INFO L356 Elim1Store]: treesize reduction 58, result has 24.7 percent of original size [2022-07-21 16:57:07,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 31 [2022-07-21 16:57:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 2 proven. 192 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 16:57:07,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:10,187 INFO L356 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2022-07-21 16:57:10,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 107 treesize of output 100 [2022-07-21 16:57:10,197 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:10,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2022-07-21 16:57:10,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:10,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2022-07-21 16:57:10,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:57:10,255 INFO L356 Elim1Store]: treesize reduction 9, result has 84.2 percent of original size [2022-07-21 16:57:10,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 100 [2022-07-21 16:57:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:57:13,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593564479] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:13,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:13,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 34, 35] total 83 [2022-07-21 16:57:13,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341662291] [2022-07-21 16:57:13,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:13,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-21 16:57:13,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:13,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-21 16:57:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=6124, Unknown=0, NotChecked=0, Total=6806 [2022-07-21 16:57:13,642 INFO L87 Difference]: Start difference. First operand 3325 states and 3677 transitions. Second operand has 83 states, 83 states have (on average 2.3373493975903616) internal successors, (194), 83 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) [2022-07-21 16:57:23,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:23,323 INFO L93 Difference]: Finished difference Result 3414 states and 3704 transitions. [2022-07-21 16:57:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-07-21 16:57:23,325 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.3373493975903616) internal successors, (194), 83 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) Word has length 83 [2022-07-21 16:57:23,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:23,329 INFO L225 Difference]: With dead ends: 3414 [2022-07-21 16:57:23,329 INFO L226 Difference]: Without dead ends: 3159 [2022-07-21 16:57:23,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8778 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=3263, Invalid=33409, Unknown=0, NotChecked=0, Total=36672 [2022-07-21 16:57:23,332 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 636 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 5030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2852 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:23,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 1693 Invalid, 5030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2028 Invalid, 0 Unknown, 2852 Unchecked, 1.0s Time] [2022-07-21 16:57:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2022-07-21 16:57:23,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 2559. [2022-07-21 16:57:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 2557 states have (on average 1.100117324990223) internal successors, (2813), 2558 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 2813 transitions. [2022-07-21 16:57:23,369 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 2813 transitions. Word has length 83 [2022-07-21 16:57:23,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:23,369 INFO L495 AbstractCegarLoop]: Abstraction has 2559 states and 2813 transitions. [2022-07-21 16:57:23,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.3373493975903616) internal successors, (194), 83 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) [2022-07-21 16:57:23,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 2813 transitions. [2022-07-21 16:57:23,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 16:57:23,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:23,372 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:23,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:23,588 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,SelfDestructingSolverStorable49 [2022-07-21 16:57:23,589 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:57:23,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:23,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1806603827, now seen corresponding path program 12 times [2022-07-21 16:57:23,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:23,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227073365] [2022-07-21 16:57:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:23,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:23,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:23,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227073365] [2022-07-21 16:57:23,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227073365] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:23,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125827089] [2022-07-21 16:57:23,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:57:23,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:23,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:23,970 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:23,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-21 16:57:24,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-21 16:57:24,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:24,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 132 conjunts are in the unsatisfiable core [2022-07-21 16:57:24,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:24,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:57:24,585 INFO L356 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2022-07-21 16:57:24,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-21 16:57:25,387 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-07-21 16:57:25,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2022-07-21 16:57:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:25,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:25,877 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 7)) 0)) is different from false [2022-07-21 16:57:25,881 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:25,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-21 16:57:25,888 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:25,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-07-21 16:57:25,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:57:25,906 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:25,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2022-07-21 16:57:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:26,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125827089] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:26,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:26,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30, 26] total 67 [2022-07-21 16:57:26,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733487303] [2022-07-21 16:57:26,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:26,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-21 16:57:26,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:26,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-21 16:57:26,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=4077, Unknown=1, NotChecked=128, Total=4422 [2022-07-21 16:57:26,294 INFO L87 Difference]: Start difference. First operand 2559 states and 2813 transitions. Second operand has 67 states, 67 states have (on average 3.0) internal successors, (201), 67 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) [2022-07-21 16:57:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:29,435 INFO L93 Difference]: Finished difference Result 4780 states and 5113 transitions. [2022-07-21 16:57:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-21 16:57:29,435 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.0) internal successors, (201), 67 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) Word has length 84 [2022-07-21 16:57:29,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:29,440 INFO L225 Difference]: With dead ends: 4780 [2022-07-21 16:57:29,440 INFO L226 Difference]: Without dead ends: 4689 [2022-07-21 16:57:29,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3648 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=710, Invalid=13573, Unknown=1, NotChecked=236, Total=14520 [2022-07-21 16:57:29,441 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 462 mSDsluCounter, 5286 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 5466 SdHoareTripleChecker+Invalid, 3951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1188 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:29,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 5466 Invalid, 3951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2689 Invalid, 0 Unknown, 1188 Unchecked, 0.9s Time] [2022-07-21 16:57:29,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4689 states. [2022-07-21 16:57:29,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4689 to 2863. [2022-07-21 16:57:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2861 states have (on average 1.1010136315973436) internal successors, (3150), 2862 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:29,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 3150 transitions. [2022-07-21 16:57:29,465 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 3150 transitions. Word has length 84 [2022-07-21 16:57:29,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:29,465 INFO L495 AbstractCegarLoop]: Abstraction has 2863 states and 3150 transitions. [2022-07-21 16:57:29,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.0) internal successors, (201), 67 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) [2022-07-21 16:57:29,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 3150 transitions. [2022-07-21 16:57:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-21 16:57:29,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:29,468 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:29,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-21 16:57:29,679 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,SelfDestructingSolverStorable50 [2022-07-21 16:57:29,679 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:57:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:29,679 INFO L85 PathProgramCache]: Analyzing trace with hash -738556896, now seen corresponding path program 11 times [2022-07-21 16:57:29,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:29,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636709636] [2022-07-21 16:57:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:29,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 28 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:29,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:29,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636709636] [2022-07-21 16:57:29,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636709636] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:29,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995264501] [2022-07-21 16:57:29,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:57:29,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:29,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:29,923 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:29,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-21 16:57:30,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-21 16:57:30,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:30,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-21 16:57:30,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:30,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:30,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-07-21 16:57:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:30,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995264501] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:30,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:30,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2022-07-21 16:57:30,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980502325] [2022-07-21 16:57:30,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:30,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 16:57:30,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:30,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 16:57:30,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 16:57:30,900 INFO L87 Difference]: Start difference. First operand 2863 states and 3150 transitions. Second operand has 44 states, 43 states have (on average 4.627906976744186) internal successors, (199), 44 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:31,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:31,828 INFO L93 Difference]: Finished difference Result 4159 states and 4549 transitions. [2022-07-21 16:57:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 16:57:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.627906976744186) internal successors, (199), 44 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-07-21 16:57:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:31,834 INFO L225 Difference]: With dead ends: 4159 [2022-07-21 16:57:31,834 INFO L226 Difference]: Without dead ends: 4159 [2022-07-21 16:57:31,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=904, Invalid=3518, Unknown=0, NotChecked=0, Total=4422 [2022-07-21 16:57:31,835 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 564 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:31,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1871 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 16:57:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2022-07-21 16:57:31,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3054. [2022-07-21 16:57:31,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3054 states, 3052 states have (on average 1.1005897771952817) internal successors, (3359), 3053 states have internal predecessors, (3359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:31,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3054 states to 3054 states and 3359 transitions. [2022-07-21 16:57:31,863 INFO L78 Accepts]: Start accepts. Automaton has 3054 states and 3359 transitions. Word has length 85 [2022-07-21 16:57:31,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:31,864 INFO L495 AbstractCegarLoop]: Abstraction has 3054 states and 3359 transitions. [2022-07-21 16:57:31,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.627906976744186) internal successors, (199), 44 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:31,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3054 states and 3359 transitions. [2022-07-21 16:57:31,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-21 16:57:31,867 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:31,867 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:31,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:32,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:32,091 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:57:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:32,092 INFO L85 PathProgramCache]: Analyzing trace with hash -295170928, now seen corresponding path program 13 times [2022-07-21 16:57:32,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:32,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660312512] [2022-07-21 16:57:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:32,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 66 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:32,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:32,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660312512] [2022-07-21 16:57:32,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660312512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:32,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132718807] [2022-07-21 16:57:32,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:57:32,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:32,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:32,419 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:32,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-21 16:57:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:32,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-21 16:57:32,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:32,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:33,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:57:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:33,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132718807] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:33,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:33,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 50 [2022-07-21 16:57:33,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562471176] [2022-07-21 16:57:33,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:33,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 16:57:33,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:33,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 16:57:33,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2285, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 16:57:33,305 INFO L87 Difference]: Start difference. First operand 3054 states and 3359 transitions. Second operand has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:34,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:34,784 INFO L93 Difference]: Finished difference Result 5511 states and 5907 transitions. [2022-07-21 16:57:34,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 16:57:34,784 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 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 88 [2022-07-21 16:57:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:34,792 INFO L225 Difference]: With dead ends: 5511 [2022-07-21 16:57:34,792 INFO L226 Difference]: Without dead ends: 5511 [2022-07-21 16:57:34,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1167, Invalid=5153, Unknown=0, NotChecked=0, Total=6320 [2022-07-21 16:57:34,793 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 764 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:34,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 1617 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 16:57:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2022-07-21 16:57:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 3439. [2022-07-21 16:57:34,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3439 states, 3437 states have (on average 1.1088158277567646) internal successors, (3811), 3438 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:34,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 3811 transitions. [2022-07-21 16:57:34,846 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 3811 transitions. Word has length 88 [2022-07-21 16:57:34,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:34,847 INFO L495 AbstractCegarLoop]: Abstraction has 3439 states and 3811 transitions. [2022-07-21 16:57:34,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:34,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 3811 transitions. [2022-07-21 16:57:34,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-21 16:57:34,850 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:34,850 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 8, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:34,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:35,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-07-21 16:57:35,063 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:57:35,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:35,064 INFO L85 PathProgramCache]: Analyzing trace with hash -318093152, now seen corresponding path program 4 times [2022-07-21 16:57:35,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:35,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175315852] [2022-07-21 16:57:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:35,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 15 proven. 198 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 16:57:35,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:35,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175315852] [2022-07-21 16:57:35,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175315852] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:35,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474285509] [2022-07-21 16:57:35,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:57:35,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:35,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:35,288 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:35,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-21 16:57:35,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:57:35,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:35,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-21 16:57:35,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:35,459 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:35,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:57:35,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-21 16:57:36,092 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:36,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-21 16:57:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 32 proven. 181 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 16:57:36,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:36,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:57:36,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:57:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 45 proven. 168 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 16:57:37,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474285509] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:37,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:37,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 57 [2022-07-21 16:57:37,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508227216] [2022-07-21 16:57:37,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:37,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-21 16:57:37,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:37,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-21 16:57:37,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=3000, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 16:57:37,653 INFO L87 Difference]: Start difference. First operand 3439 states and 3811 transitions. Second operand has 58 states, 57 states have (on average 3.6491228070175437) internal successors, (208), 58 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:41,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:41,072 INFO L93 Difference]: Finished difference Result 4805 states and 5171 transitions. [2022-07-21 16:57:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-21 16:57:41,073 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.6491228070175437) internal successors, (208), 58 states have internal predecessors, (208), 0 states have call successors, (0), 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 88 [2022-07-21 16:57:41,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:41,078 INFO L225 Difference]: With dead ends: 4805 [2022-07-21 16:57:41,078 INFO L226 Difference]: Without dead ends: 4445 [2022-07-21 16:57:41,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2146, Invalid=9410, Unknown=0, NotChecked=0, Total=11556 [2022-07-21 16:57:41,079 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 791 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:41,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 1582 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2068 Invalid, 0 Unknown, 155 Unchecked, 0.9s Time] [2022-07-21 16:57:41,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4445 states. [2022-07-21 16:57:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4445 to 3214. [2022-07-21 16:57:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3214 states, 3212 states have (on average 1.1055417185554173) internal successors, (3551), 3213 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3214 states to 3214 states and 3551 transitions. [2022-07-21 16:57:41,112 INFO L78 Accepts]: Start accepts. Automaton has 3214 states and 3551 transitions. Word has length 88 [2022-07-21 16:57:41,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:41,113 INFO L495 AbstractCegarLoop]: Abstraction has 3214 states and 3551 transitions. [2022-07-21 16:57:41,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.6491228070175437) internal successors, (208), 58 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:41,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3214 states and 3551 transitions. [2022-07-21 16:57:41,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-21 16:57:41,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:41,115 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:41,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:41,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:41,339 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:57:41,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:41,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1131628520, now seen corresponding path program 14 times [2022-07-21 16:57:41,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:41,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409012734] [2022-07-21 16:57:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:41,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:41,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:41,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409012734] [2022-07-21 16:57:41,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409012734] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:41,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573452494] [2022-07-21 16:57:41,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:57:41,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:41,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:41,714 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:41,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-21 16:57:41,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:57:41,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:41,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 110 conjunts are in the unsatisfiable core [2022-07-21 16:57:41,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:42,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:42,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:57:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:42,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:42,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:57:42,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:57:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:42,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573452494] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:42,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:42,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 48 [2022-07-21 16:57:42,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439478682] [2022-07-21 16:57:42,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:42,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-21 16:57:42,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:42,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-21 16:57:42,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2113, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 16:57:42,555 INFO L87 Difference]: Start difference. First operand 3214 states and 3551 transitions. Second operand has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:44,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:44,858 INFO L93 Difference]: Finished difference Result 6061 states and 6485 transitions. [2022-07-21 16:57:44,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-21 16:57:44,859 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 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 93 [2022-07-21 16:57:44,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:44,864 INFO L225 Difference]: With dead ends: 6061 [2022-07-21 16:57:44,864 INFO L226 Difference]: Without dead ends: 5650 [2022-07-21 16:57:44,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 170 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=851, Invalid=7705, Unknown=0, NotChecked=0, Total=8556 [2022-07-21 16:57:44,865 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 873 mSDsluCounter, 4515 mSDsCounter, 0 mSdLazyCounter, 3445 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 4725 SdHoareTripleChecker+Invalid, 3824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:44,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 4725 Invalid, 3824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3445 Invalid, 0 Unknown, 266 Unchecked, 1.1s Time] [2022-07-21 16:57:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5650 states. [2022-07-21 16:57:44,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5650 to 3583. [2022-07-21 16:57:44,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3581 states have (on average 1.107511868193242) internal successors, (3966), 3582 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 3966 transitions. [2022-07-21 16:57:44,898 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 3966 transitions. Word has length 93 [2022-07-21 16:57:44,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:44,898 INFO L495 AbstractCegarLoop]: Abstraction has 3583 states and 3966 transitions. [2022-07-21 16:57:44,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:44,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 3966 transitions. [2022-07-21 16:57:44,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-21 16:57:44,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:44,900 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:44,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:45,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:45,100 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:57:45,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:45,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2067645676, now seen corresponding path program 12 times [2022-07-21 16:57:45,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:45,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983952684] [2022-07-21 16:57:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:45,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:45,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:45,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983952684] [2022-07-21 16:57:45,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983952684] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:45,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076788615] [2022-07-21 16:57:45,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:57:45,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:45,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:45,724 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:45,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-21 16:57:45,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-21 16:57:45,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:45,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-21 16:57:45,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:45,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:57:46,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:46,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:57:46,863 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 16:57:46,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-21 16:57:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:46,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:46,995 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1461 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 16:57:46,998 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:46,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:57:47,003 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:47,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:57:47,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:57:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:47,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076788615] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:47,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:47,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 24] total 52 [2022-07-21 16:57:47,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415716924] [2022-07-21 16:57:47,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:47,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 16:57:47,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:47,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 16:57:47,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2423, Unknown=1, NotChecked=98, Total=2652 [2022-07-21 16:57:47,284 INFO L87 Difference]: Start difference. First operand 3583 states and 3966 transitions. Second operand has 52 states, 52 states have (on average 3.6346153846153846) internal successors, (189), 52 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:48,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:48,534 INFO L93 Difference]: Finished difference Result 5784 states and 6368 transitions. [2022-07-21 16:57:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 16:57:48,538 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.6346153846153846) internal successors, (189), 52 states have internal predecessors, (189), 0 states have call successors, (0), 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 93 [2022-07-21 16:57:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:48,542 INFO L225 Difference]: With dead ends: 5784 [2022-07-21 16:57:48,542 INFO L226 Difference]: Without dead ends: 4564 [2022-07-21 16:57:48,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=282, Invalid=5420, Unknown=2, NotChecked=148, Total=5852 [2022-07-21 16:57:48,543 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 195 mSDsluCounter, 3766 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 3864 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:48,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 3864 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1619 Invalid, 0 Unknown, 345 Unchecked, 0.5s Time] [2022-07-21 16:57:48,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4564 states. [2022-07-21 16:57:48,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4564 to 3847. [2022-07-21 16:57:48,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3847 states, 3845 states have (on average 1.107152145643693) internal successors, (4257), 3846 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3847 states to 3847 states and 4257 transitions. [2022-07-21 16:57:48,585 INFO L78 Accepts]: Start accepts. Automaton has 3847 states and 4257 transitions. Word has length 93 [2022-07-21 16:57:48,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:48,585 INFO L495 AbstractCegarLoop]: Abstraction has 3847 states and 4257 transitions. [2022-07-21 16:57:48,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.6346153846153846) internal successors, (189), 52 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:48,585 INFO L276 IsEmpty]: Start isEmpty. Operand 3847 states and 4257 transitions. [2022-07-21 16:57:48,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-21 16:57:48,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:48,587 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:48,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:48,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-21 16:57:48,788 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:57:48,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:48,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1504487979, now seen corresponding path program 15 times [2022-07-21 16:57:48,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:48,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030586175] [2022-07-21 16:57:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:48,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 91 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:49,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:49,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030586175] [2022-07-21 16:57:49,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030586175] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:49,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221781797] [2022-07-21 16:57:49,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:57:49,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:49,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:49,219 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:49,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-21 16:57:49,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-21 16:57:49,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:49,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-21 16:57:49,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:49,414 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:57:49,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:57:49,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:57:49,936 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:57:49,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-21 16:57:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-07-21 16:57:50,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:50,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:57:50,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:57:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-07-21 16:57:50,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221781797] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:50,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:50,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 10] total 44 [2022-07-21 16:57:50,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450189222] [2022-07-21 16:57:50,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:50,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 16:57:50,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:50,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 16:57:50,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1736, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 16:57:50,753 INFO L87 Difference]: Start difference. First operand 3847 states and 4257 transitions. Second operand has 45 states, 44 states have (on average 3.3863636363636362) internal successors, (149), 45 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:52,024 INFO L93 Difference]: Finished difference Result 4187 states and 4632 transitions. [2022-07-21 16:57:52,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-21 16:57:52,024 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.3863636363636362) internal successors, (149), 45 states have internal predecessors, (149), 0 states have call successors, (0), 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 97 [2022-07-21 16:57:52,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:52,027 INFO L225 Difference]: With dead ends: 4187 [2022-07-21 16:57:52,027 INFO L226 Difference]: Without dead ends: 4088 [2022-07-21 16:57:52,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=784, Invalid=5696, Unknown=0, NotChecked=0, Total=6480 [2022-07-21 16:57:52,028 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 68 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:52,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 491 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 770 Invalid, 0 Unknown, 175 Unchecked, 0.3s Time] [2022-07-21 16:57:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2022-07-21 16:57:52,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 3864. [2022-07-21 16:57:52,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3864 states, 3862 states have (on average 1.104091144484723) internal successors, (4264), 3863 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:52,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3864 states to 3864 states and 4264 transitions. [2022-07-21 16:57:52,062 INFO L78 Accepts]: Start accepts. Automaton has 3864 states and 4264 transitions. Word has length 97 [2022-07-21 16:57:52,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:52,062 INFO L495 AbstractCegarLoop]: Abstraction has 3864 states and 4264 transitions. [2022-07-21 16:57:52,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.3863636363636362) internal successors, (149), 45 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:52,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3864 states and 4264 transitions. [2022-07-21 16:57:52,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-21 16:57:52,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:52,064 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:52,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:52,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-21 16:57:52,265 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:57:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:52,265 INFO L85 PathProgramCache]: Analyzing trace with hash 73409007, now seen corresponding path program 13 times [2022-07-21 16:57:52,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:52,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567946119] [2022-07-21 16:57:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:52,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:52,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:52,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567946119] [2022-07-21 16:57:52,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567946119] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:52,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752091540] [2022-07-21 16:57:52,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:57:52,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:52,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:52,523 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:52,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-21 16:57:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:52,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-21 16:57:52,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:52,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:53,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:57:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:57:53,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752091540] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:53,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:53,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 42 [2022-07-21 16:57:53,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485550146] [2022-07-21 16:57:53,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:53,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 16:57:53,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:53,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 16:57:53,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 16:57:53,386 INFO L87 Difference]: Start difference. First operand 3864 states and 4264 transitions. Second operand has 43 states, 42 states have (on average 4.642857142857143) internal successors, (195), 43 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:54,486 INFO L93 Difference]: Finished difference Result 5944 states and 6528 transitions. [2022-07-21 16:57:54,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 16:57:54,486 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 4.642857142857143) internal successors, (195), 43 states have internal predecessors, (195), 0 states have call successors, (0), 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 97 [2022-07-21 16:57:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:54,490 INFO L225 Difference]: With dead ends: 5944 [2022-07-21 16:57:54,490 INFO L226 Difference]: Without dead ends: 5944 [2022-07-21 16:57:54,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=3695, Unknown=0, NotChecked=0, Total=4556 [2022-07-21 16:57:54,490 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 691 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 1587 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1963 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:54,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1963 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1587 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 16:57:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2022-07-21 16:57:54,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 4163. [2022-07-21 16:57:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4163 states, 4161 states have (on average 1.1040615236721942) internal successors, (4594), 4162 states have internal predecessors, (4594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 4594 transitions. [2022-07-21 16:57:54,524 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 4594 transitions. Word has length 97 [2022-07-21 16:57:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:54,524 INFO L495 AbstractCegarLoop]: Abstraction has 4163 states and 4594 transitions. [2022-07-21 16:57:54,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 4.642857142857143) internal successors, (195), 43 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 4594 transitions. [2022-07-21 16:57:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-21 16:57:54,527 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:54,527 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:54,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-21 16:57:54,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-21 16:57:54,727 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:57:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:54,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1160729539, now seen corresponding path program 5 times [2022-07-21 16:57:54,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:54,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886279269] [2022-07-21 16:57:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:54,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:57:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 139 proven. 200 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 16:57:55,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:57:55,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886279269] [2022-07-21 16:57:55,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886279269] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:57:55,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737452497] [2022-07-21 16:57:55,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:57:55,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:57:55,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:57:55,060 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:57:55,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-21 16:57:55,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-21 16:57:55,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:57:55,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-21 16:57:55,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:57:55,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 16:57:55,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:57:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 139 proven. 191 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-21 16:57:55,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:57:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 139 proven. 140 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-21 16:57:55,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737452497] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:57:55,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:57:55,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 17] total 44 [2022-07-21 16:57:55,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205520423] [2022-07-21 16:57:55,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:57:55,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 16:57:55,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:57:55,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 16:57:55,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 16:57:55,805 INFO L87 Difference]: Start difference. First operand 4163 states and 4594 transitions. Second operand has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:57:59,245 INFO L93 Difference]: Finished difference Result 6637 states and 7115 transitions. [2022-07-21 16:57:59,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-21 16:57:59,245 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 0 states have call successors, (0), 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 102 [2022-07-21 16:57:59,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:57:59,249 INFO L225 Difference]: With dead ends: 6637 [2022-07-21 16:57:59,249 INFO L226 Difference]: Without dead ends: 6223 [2022-07-21 16:57:59,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4485 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1667, Invalid=16693, Unknown=0, NotChecked=0, Total=18360 [2022-07-21 16:57:59,251 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 445 mSDsluCounter, 2607 mSDsCounter, 0 mSdLazyCounter, 3470 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 2732 SdHoareTripleChecker+Invalid, 3563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 3470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:57:59,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 2732 Invalid, 3563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 3470 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 16:57:59,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6223 states. [2022-07-21 16:57:59,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6223 to 4198. [2022-07-21 16:57:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4198 states, 4196 states have (on average 1.0969971401334604) internal successors, (4603), 4197 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:59,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 4603 transitions. [2022-07-21 16:57:59,301 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 4603 transitions. Word has length 102 [2022-07-21 16:57:59,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:57:59,302 INFO L495 AbstractCegarLoop]: Abstraction has 4198 states and 4603 transitions. [2022-07-21 16:57:59,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:57:59,302 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 4603 transitions. [2022-07-21 16:57:59,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-21 16:57:59,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:57:59,304 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:57:59,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-21 16:57:59,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-21 16:57:59,504 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:57:59,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:57:59,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1376527291, now seen corresponding path program 14 times [2022-07-21 16:57:59,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:57:59,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607203758] [2022-07-21 16:57:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:57:59,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:57:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:00,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:00,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607203758] [2022-07-21 16:58:00,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607203758] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:00,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348325609] [2022-07-21 16:58:00,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:58:00,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:00,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:00,223 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:00,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-21 16:58:00,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:58:00,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:00,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 114 conjunts are in the unsatisfiable core [2022-07-21 16:58:00,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:00,389 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:58:00,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:58:00,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:00,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-21 16:58:00,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-21 16:58:01,555 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:01,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-21 16:58:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 66 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:01,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:03,235 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:03,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:58:03,241 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:03,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:58:03,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:58:04,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:04,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 91 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:58:04,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348325609] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:04,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:04,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 26] total 81 [2022-07-21 16:58:04,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947631519] [2022-07-21 16:58:04,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:04,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-21 16:58:04,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:04,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-21 16:58:04,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=6049, Unknown=8, NotChecked=0, Total=6480 [2022-07-21 16:58:04,375 INFO L87 Difference]: Start difference. First operand 4198 states and 4603 transitions. Second operand has 81 states, 81 states have (on average 3.7901234567901234) internal successors, (307), 81 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:17,834 INFO L93 Difference]: Finished difference Result 10881 states and 11876 transitions. [2022-07-21 16:58:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-07-21 16:58:17,835 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.7901234567901234) internal successors, (307), 81 states have internal predecessors, (307), 0 states have call successors, (0), 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 105 [2022-07-21 16:58:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:17,841 INFO L225 Difference]: With dead ends: 10881 [2022-07-21 16:58:17,841 INFO L226 Difference]: Without dead ends: 9490 [2022-07-21 16:58:17,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 175 SyntacticMatches, 5 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10925 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=5524, Invalid=41773, Unknown=9, NotChecked=0, Total=47306 [2022-07-21 16:58:17,843 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 2043 mSDsluCounter, 6556 mSDsCounter, 0 mSdLazyCounter, 6208 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2043 SdHoareTripleChecker+Valid, 6708 SdHoareTripleChecker+Invalid, 6934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 6208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:17,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2043 Valid, 6708 Invalid, 6934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 6208 Invalid, 0 Unknown, 384 Unchecked, 2.5s Time] [2022-07-21 16:58:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9490 states. [2022-07-21 16:58:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9490 to 6882. [2022-07-21 16:58:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6882 states, 6880 states have (on average 1.098546511627907) internal successors, (7558), 6881 states have internal predecessors, (7558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6882 states to 6882 states and 7558 transitions. [2022-07-21 16:58:17,903 INFO L78 Accepts]: Start accepts. Automaton has 6882 states and 7558 transitions. Word has length 105 [2022-07-21 16:58:17,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:17,903 INFO L495 AbstractCegarLoop]: Abstraction has 6882 states and 7558 transitions. [2022-07-21 16:58:17,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.7901234567901234) internal successors, (307), 81 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 6882 states and 7558 transitions. [2022-07-21 16:58:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-21 16:58:17,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:17,906 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:17,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-21 16:58:18,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:18,106 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:58:18,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:18,107 INFO L85 PathProgramCache]: Analyzing trace with hash -156704653, now seen corresponding path program 6 times [2022-07-21 16:58:18,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:18,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702144367] [2022-07-21 16:58:18,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:18,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 123 proven. 290 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 16:58:18,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:18,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702144367] [2022-07-21 16:58:18,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702144367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:18,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847659127] [2022-07-21 16:58:18,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:58:18,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:18,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:18,481 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:18,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-21 16:58:18,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-21 16:58:18,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:18,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-21 16:58:18,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:18,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:58:19,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:58:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 24 proven. 346 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-21 16:58:19,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:19,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:58:19,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:58:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 24 proven. 346 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-21 16:58:19,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847659127] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:19,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:19,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 23] total 49 [2022-07-21 16:58:19,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741469040] [2022-07-21 16:58:19,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:19,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 16:58:19,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:19,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 16:58:19,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2215, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 16:58:19,548 INFO L87 Difference]: Start difference. First operand 6882 states and 7558 transitions. Second operand has 49 states, 49 states have (on average 3.795918367346939) internal successors, (186), 49 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) [2022-07-21 16:58:27,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:27,761 INFO L93 Difference]: Finished difference Result 16875 states and 17795 transitions. [2022-07-21 16:58:27,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-07-21 16:58:27,761 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.795918367346939) internal successors, (186), 49 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) Word has length 107 [2022-07-21 16:58:27,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:27,775 INFO L225 Difference]: With dead ends: 16875 [2022-07-21 16:58:27,776 INFO L226 Difference]: Without dead ends: 15713 [2022-07-21 16:58:27,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 189 SyntacticMatches, 6 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 17541 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2968, Invalid=49244, Unknown=0, NotChecked=0, Total=52212 [2022-07-21 16:58:27,779 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 936 mSDsluCounter, 6988 mSDsCounter, 0 mSdLazyCounter, 7064 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 7255 SdHoareTripleChecker+Invalid, 7598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 7064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:27,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 7255 Invalid, 7598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 7064 Invalid, 0 Unknown, 363 Unchecked, 2.3s Time] [2022-07-21 16:58:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15713 states. [2022-07-21 16:58:27,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15713 to 6367. [2022-07-21 16:58:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6367 states, 6365 states have (on average 1.0952081696779261) internal successors, (6971), 6366 states have internal predecessors, (6971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 6971 transitions. [2022-07-21 16:58:27,876 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 6971 transitions. Word has length 107 [2022-07-21 16:58:27,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:27,876 INFO L495 AbstractCegarLoop]: Abstraction has 6367 states and 6971 transitions. [2022-07-21 16:58:27,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.795918367346939) internal successors, (186), 49 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) [2022-07-21 16:58:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 6971 transitions. [2022-07-21 16:58:27,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-21 16:58:27,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:27,878 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 12, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:27,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-07-21 16:58:28,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-07-21 16:58:28,079 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:58:28,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:28,079 INFO L85 PathProgramCache]: Analyzing trace with hash -618797094, now seen corresponding path program 7 times [2022-07-21 16:58:28,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:28,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344268899] [2022-07-21 16:58:28,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:28,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 45 proven. 387 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-21 16:58:28,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:28,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344268899] [2022-07-21 16:58:28,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344268899] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:28,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255460390] [2022-07-21 16:58:28,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:58:28,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:28,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:28,410 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:28,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-21 16:58:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:28,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-21 16:58:28,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 66 proven. 366 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-21 16:58:28,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:29,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:58:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 66 proven. 366 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-21 16:58:29,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255460390] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:29,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:29,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 46 [2022-07-21 16:58:29,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447298781] [2022-07-21 16:58:29,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:29,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-21 16:58:29,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:29,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-21 16:58:29,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1937, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 16:58:29,378 INFO L87 Difference]: Start difference. First operand 6367 states and 6971 transitions. Second operand has 47 states, 46 states have (on average 4.130434782608695) internal successors, (190), 47 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:30,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:30,661 INFO L93 Difference]: Finished difference Result 13095 states and 13903 transitions. [2022-07-21 16:58:30,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 16:58:30,661 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.130434782608695) internal successors, (190), 47 states have internal predecessors, (190), 0 states have call successors, (0), 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 116 [2022-07-21 16:58:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:30,672 INFO L225 Difference]: With dead ends: 13095 [2022-07-21 16:58:30,673 INFO L226 Difference]: Without dead ends: 13095 [2022-07-21 16:58:30,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=970, Invalid=4286, Unknown=0, NotChecked=0, Total=5256 [2022-07-21 16:58:30,673 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 657 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:30,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 1379 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 16:58:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13095 states. [2022-07-21 16:58:30,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13095 to 6472. [2022-07-21 16:58:30,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6472 states, 6470 states have (on average 1.0969088098918083) internal successors, (7097), 6471 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:30,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6472 states to 6472 states and 7097 transitions. [2022-07-21 16:58:30,758 INFO L78 Accepts]: Start accepts. Automaton has 6472 states and 7097 transitions. Word has length 116 [2022-07-21 16:58:30,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:30,758 INFO L495 AbstractCegarLoop]: Abstraction has 6472 states and 7097 transitions. [2022-07-21 16:58:30,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.130434782608695) internal successors, (190), 47 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:30,758 INFO L276 IsEmpty]: Start isEmpty. Operand 6472 states and 7097 transitions. [2022-07-21 16:58:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-21 16:58:30,760 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:30,760 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 13, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:30,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-21 16:58:30,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:30,961 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:58:30,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash 863300318, now seen corresponding path program 8 times [2022-07-21 16:58:30,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:30,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375366481] [2022-07-21 16:58:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:30,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 147 proven. 420 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 16:58:31,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:31,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375366481] [2022-07-21 16:58:31,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375366481] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:31,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993413998] [2022-07-21 16:58:31,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:58:31,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:31,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:31,396 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:31,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-21 16:58:31,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:58:31,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:31,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 130 conjunts are in the unsatisfiable core [2022-07-21 16:58:31,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:31,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 16:58:31,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:58:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 147 proven. 415 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 16:58:31,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 147 proven. 330 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-21 16:58:32,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993413998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:32,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:32,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 21] total 56 [2022-07-21 16:58:32,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726619142] [2022-07-21 16:58:32,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:32,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-21 16:58:32,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:32,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-21 16:58:32,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2898, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 16:58:32,307 INFO L87 Difference]: Start difference. First operand 6472 states and 7097 transitions. Second operand has 56 states, 56 states have (on average 3.9285714285714284) internal successors, (220), 56 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:38,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:38,719 INFO L93 Difference]: Finished difference Result 15686 states and 16683 transitions. [2022-07-21 16:58:38,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-07-21 16:58:38,720 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.9285714285714284) internal successors, (220), 56 states have internal predecessors, (220), 0 states have call successors, (0), 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 121 [2022-07-21 16:58:38,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:38,731 INFO L225 Difference]: With dead ends: 15686 [2022-07-21 16:58:38,731 INFO L226 Difference]: Without dead ends: 15224 [2022-07-21 16:58:38,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11548 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2667, Invalid=39153, Unknown=0, NotChecked=0, Total=41820 [2022-07-21 16:58:38,734 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 903 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 6179 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 5700 SdHoareTripleChecker+Invalid, 6328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 6179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:38,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [903 Valid, 5700 Invalid, 6328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 6179 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-21 16:58:38,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15224 states. [2022-07-21 16:58:38,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15224 to 6512. [2022-07-21 16:58:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6512 states, 6510 states have (on average 1.0935483870967742) internal successors, (7119), 6511 states have internal predecessors, (7119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6512 states to 6512 states and 7119 transitions. [2022-07-21 16:58:38,821 INFO L78 Accepts]: Start accepts. Automaton has 6512 states and 7119 transitions. Word has length 121 [2022-07-21 16:58:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:38,821 INFO L495 AbstractCegarLoop]: Abstraction has 6512 states and 7119 transitions. [2022-07-21 16:58:38,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.9285714285714284) internal successors, (220), 56 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:38,821 INFO L276 IsEmpty]: Start isEmpty. Operand 6512 states and 7119 transitions. [2022-07-21 16:58:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-21 16:58:38,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:38,823 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 14, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:38,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-21 16:58:39,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-07-21 16:58:39,024 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:58:39,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:39,025 INFO L85 PathProgramCache]: Analyzing trace with hash -560233150, now seen corresponding path program 9 times [2022-07-21 16:58:39,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:39,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45847732] [2022-07-21 16:58:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:39,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 101 proven. 546 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 16:58:39,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:39,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45847732] [2022-07-21 16:58:39,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45847732] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:39,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129351080] [2022-07-21 16:58:39,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:58:39,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:39,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:39,552 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:39,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-21 16:58:39,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-21 16:58:39,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:39,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 193 conjunts are in the unsatisfiable core [2022-07-21 16:58:39,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:39,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:58:40,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:58:40,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:58:41,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 10 [2022-07-21 16:58:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 98 proven. 549 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 16:58:41,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 101 proven. 455 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-21 16:58:42,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129351080] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:42,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:42,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 38, 23] total 80 [2022-07-21 16:58:42,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432708293] [2022-07-21 16:58:42,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:42,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-21 16:58:42,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:42,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-21 16:58:42,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=6039, Unknown=0, NotChecked=0, Total=6320 [2022-07-21 16:58:42,439 INFO L87 Difference]: Start difference. First operand 6512 states and 7119 transitions. Second operand has 80 states, 80 states have (on average 3.6875) internal successors, (295), 80 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:58:53,301 INFO L93 Difference]: Finished difference Result 19007 states and 20201 transitions. [2022-07-21 16:58:53,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2022-07-21 16:58:53,302 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.6875) internal successors, (295), 80 states have internal predecessors, (295), 0 states have call successors, (0), 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 126 [2022-07-21 16:58:53,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:58:53,316 INFO L225 Difference]: With dead ends: 19007 [2022-07-21 16:58:53,316 INFO L226 Difference]: Without dead ends: 18399 [2022-07-21 16:58:53,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 259 SyntacticMatches, 8 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36284 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=4102, Invalid=93554, Unknown=0, NotChecked=0, Total=97656 [2022-07-21 16:58:53,320 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 948 mSDsluCounter, 11573 mSDsCounter, 0 mSdLazyCounter, 9139 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 11906 SdHoareTripleChecker+Invalid, 12023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 9139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2715 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:58:53,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 11906 Invalid, 12023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 9139 Invalid, 0 Unknown, 2715 Unchecked, 3.0s Time] [2022-07-21 16:58:53,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18399 states. [2022-07-21 16:58:53,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18399 to 6552. [2022-07-21 16:58:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6552 states, 6550 states have (on average 1.0902290076335879) internal successors, (7141), 6551 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6552 states to 6552 states and 7141 transitions. [2022-07-21 16:58:53,424 INFO L78 Accepts]: Start accepts. Automaton has 6552 states and 7141 transitions. Word has length 126 [2022-07-21 16:58:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:58:53,424 INFO L495 AbstractCegarLoop]: Abstraction has 6552 states and 7141 transitions. [2022-07-21 16:58:53,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.6875) internal successors, (295), 80 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:58:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 6552 states and 7141 transitions. [2022-07-21 16:58:53,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-21 16:58:53,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:58:53,427 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 15, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:58:53,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-21 16:58:53,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:53,629 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:58:53,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:58:53,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1339438754, now seen corresponding path program 10 times [2022-07-21 16:58:53,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:58:53,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252771846] [2022-07-21 16:58:53,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:58:53,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:58:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:58:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 32 proven. 551 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-21 16:58:54,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:58:54,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252771846] [2022-07-21 16:58:54,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252771846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:58:54,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408056386] [2022-07-21 16:58:54,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:58:54,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:58:54,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:58:54,008 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:58:54,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-21 16:58:54,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:58:54,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:58:54,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 141 conjunts are in the unsatisfiable core [2022-07-21 16:58:54,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:58:54,203 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:58:54,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:58:54,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:58:55,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:58:56,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:58:56,220 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:58:56,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-21 16:58:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 138 proven. 588 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:58:56,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:58:57,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 16:58:57,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-21 16:58:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 161 proven. 565 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:58:58,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408056386] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:58:58,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:58:58,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 37, 37] total 85 [2022-07-21 16:58:58,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026355176] [2022-07-21 16:58:58,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:58:58,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-21 16:58:58,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:58:58,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-21 16:58:58,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=6639, Unknown=0, NotChecked=0, Total=7140 [2022-07-21 16:58:58,063 INFO L87 Difference]: Start difference. First operand 6552 states and 7141 transitions. Second operand has 85 states, 85 states have (on average 3.5764705882352943) internal successors, (304), 85 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:00,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:00,759 INFO L93 Difference]: Finished difference Result 11409 states and 12268 transitions. [2022-07-21 16:59:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-21 16:59:00,759 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.5764705882352943) internal successors, (304), 85 states have internal predecessors, (304), 0 states have call successors, (0), 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 131 [2022-07-21 16:59:00,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:00,767 INFO L225 Difference]: With dead ends: 11409 [2022-07-21 16:59:00,767 INFO L226 Difference]: Without dead ends: 10786 [2022-07-21 16:59:00,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6083 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1941, Invalid=19229, Unknown=0, NotChecked=0, Total=21170 [2022-07-21 16:59:00,768 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 289 mSDsluCounter, 2092 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 2161 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:00,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 2161 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1160 Invalid, 0 Unknown, 598 Unchecked, 0.4s Time] [2022-07-21 16:59:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10786 states. [2022-07-21 16:59:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10786 to 5927. [2022-07-21 16:59:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5927 states, 5925 states have (on average 1.091476793248945) internal successors, (6467), 5926 states have internal predecessors, (6467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5927 states to 5927 states and 6467 transitions. [2022-07-21 16:59:00,818 INFO L78 Accepts]: Start accepts. Automaton has 5927 states and 6467 transitions. Word has length 131 [2022-07-21 16:59:00,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:00,818 INFO L495 AbstractCegarLoop]: Abstraction has 5927 states and 6467 transitions. [2022-07-21 16:59:00,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.5764705882352943) internal successors, (304), 85 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5927 states and 6467 transitions. [2022-07-21 16:59:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-21 16:59:00,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:00,821 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 16, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:00,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-07-21 16:59:01,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:01,021 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:01,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:01,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1222399212, now seen corresponding path program 11 times [2022-07-21 16:59:01,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:01,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82972156] [2022-07-21 16:59:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:01,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 91 proven. 636 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-21 16:59:01,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:01,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82972156] [2022-07-21 16:59:01,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82972156] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:01,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201432323] [2022-07-21 16:59:01,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:59:01,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:01,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:01,456 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:59:01,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-21 16:59:01,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-21 16:59:01,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:59:01,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 107 conjunts are in the unsatisfiable core [2022-07-21 16:59:01,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:01,699 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:59:01,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:59:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 120 proven. 607 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-21 16:59:02,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 153 proven. 574 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-21 16:59:03,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201432323] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:03,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:59:03,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 69 [2022-07-21 16:59:03,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304131470] [2022-07-21 16:59:03,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:03,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-21 16:59:03,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:59:03,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-21 16:59:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=4252, Unknown=0, NotChecked=0, Total=4830 [2022-07-21 16:59:03,473 INFO L87 Difference]: Start difference. First operand 5927 states and 6467 transitions. Second operand has 70 states, 69 states have (on average 4.420289855072464) internal successors, (305), 70 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:05,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:05,507 INFO L93 Difference]: Finished difference Result 18821 states and 20024 transitions. [2022-07-21 16:59:05,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-21 16:59:05,508 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 4.420289855072464) internal successors, (305), 70 states have internal predecessors, (305), 0 states have call successors, (0), 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 144 [2022-07-21 16:59:05,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:05,525 INFO L225 Difference]: With dead ends: 18821 [2022-07-21 16:59:05,525 INFO L226 Difference]: Without dead ends: 18821 [2022-07-21 16:59:05,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2942 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2352, Invalid=9638, Unknown=0, NotChecked=0, Total=11990 [2022-07-21 16:59:05,527 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 709 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 2407 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 1880 SdHoareTripleChecker+Invalid, 2467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:05,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 1880 Invalid, 2467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2407 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 16:59:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18821 states. [2022-07-21 16:59:05,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18821 to 6037. [2022-07-21 16:59:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6037 states, 6035 states have (on average 1.0932891466445733) internal successors, (6598), 6036 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:05,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6037 states to 6037 states and 6598 transitions. [2022-07-21 16:59:05,607 INFO L78 Accepts]: Start accepts. Automaton has 6037 states and 6598 transitions. Word has length 144 [2022-07-21 16:59:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:05,607 INFO L495 AbstractCegarLoop]: Abstraction has 6037 states and 6598 transitions. [2022-07-21 16:59:05,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 4.420289855072464) internal successors, (305), 70 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:05,608 INFO L276 IsEmpty]: Start isEmpty. Operand 6037 states and 6598 transitions. [2022-07-21 16:59:05,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-21 16:59:05,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:05,610 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 17, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:05,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-21 16:59:05,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-21 16:59:05,810 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-21 16:59:05,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:05,811 INFO L85 PathProgramCache]: Analyzing trace with hash 915020772, now seen corresponding path program 12 times [2022-07-21 16:59:05,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:59:05,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536736354] [2022-07-21 16:59:05,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:05,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:59:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 195 proven. 752 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 16:59:06,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:59:06,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536736354] [2022-07-21 16:59:06,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536736354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:06,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294143927] [2022-07-21 16:59:06,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:59:06,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:59:06,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:06,354 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:59:06,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-21 16:59:06,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-21 16:59:06,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:59:06,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-21 16:59:06,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:06,673 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:59:06,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:59:07,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10