./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0214.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0214.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 3f6f146d76d903376288fe056dbbc9e1a8443f92d5e8b82343734efc8a9842e4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:34:27,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:34:27,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:34:27,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:34:27,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:34:27,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:34:27,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:34:27,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:34:27,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:34:27,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:34:27,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:34:27,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:34:27,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:34:27,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:34:27,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:34:27,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:34:27,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:34:27,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:34:27,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:34:27,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:34:27,936 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:34:27,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:34:27,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:34:27,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:34:27,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:34:27,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:34:27,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:34:27,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:34:27,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:34:27,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:34:27,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:34:27,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:34:27,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:34:27,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:34:27,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:34:27,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:34:27,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:34:27,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:34:27,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:34:27,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:34:27,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:34:27,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:34:27,953 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:34:27,982 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:34:27,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:34:27,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:34:27,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:34:27,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:34:27,988 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:34:27,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:34:27,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:34:27,989 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:34:27,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:34:27,990 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:34:27,990 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:34:27,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:34:27,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:34:27,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:34:27,991 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:34:27,991 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:34:27,991 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:34:27,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:34:27,992 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:34:27,992 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:34:27,992 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:34:27,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:34:27,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:34:27,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:34:27,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:34:27,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:34:27,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:34:27,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:34:27,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:34:27,995 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f6f146d76d903376288fe056dbbc9e1a8443f92d5e8b82343734efc8a9842e4 [2022-07-12 18:34:28,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:34:28,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:34:28,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:34:28,262 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:34:28,262 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:34:28,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0214.i [2022-07-12 18:34:28,334 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d20525b3e/55ce228d7f6042e2ae60725036b63570/FLAG291aca4a3 [2022-07-12 18:34:28,935 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:34:28,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0214.i [2022-07-12 18:34:28,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d20525b3e/55ce228d7f6042e2ae60725036b63570/FLAG291aca4a3 [2022-07-12 18:34:29,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d20525b3e/55ce228d7f6042e2ae60725036b63570 [2022-07-12 18:34:29,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:34:29,217 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:34:29,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:34:29,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:34:29,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:34:29,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:34:29" (1/1) ... [2022-07-12 18:34:29,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba29091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:34:29, skipping insertion in model container [2022-07-12 18:34:29,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:34:29" (1/1) ... [2022-07-12 18:34:29,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:34:29,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:34:29,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:34:29,623 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:34:29,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:34:29,709 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:34:29,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:34:29 WrapperNode [2022-07-12 18:34:29,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:34:29,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:34:29,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:34:29,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:34:29,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:34:29" (1/1) ... [2022-07-12 18:34:29,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:34:29" (1/1) ... [2022-07-12 18:34:29,791 INFO L137 Inliner]: procedures = 181, calls = 42, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 181 [2022-07-12 18:34:29,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:34:29,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:34:29,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:34:29,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:34:29,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:34:29" (1/1) ... [2022-07-12 18:34:29,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:34:29" (1/1) ... [2022-07-12 18:34:29,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:34:29" (1/1) ... [2022-07-12 18:34:29,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:34:29" (1/1) ... [2022-07-12 18:34:29,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:34:29" (1/1) ... [2022-07-12 18:34:29,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:34:29" (1/1) ... [2022-07-12 18:34:29,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:34:29" (1/1) ... [2022-07-12 18:34:29,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:34:29,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:34:29,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:34:29,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:34:29,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:34:29" (1/1) ... [2022-07-12 18:34:29,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:34:29,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:34:29,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 18:34:29,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 18:34:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-07-12 18:34:29,914 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-07-12 18:34:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 18:34:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:34:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:34:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:34:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:34:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:34:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 18:34:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 18:34:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:34:29,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:34:30,045 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:34:30,046 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:34:30,507 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:34:30,515 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:34:30,519 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 18:34:30,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:34:30 BoogieIcfgContainer [2022-07-12 18:34:30,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:34:30,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:34:30,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:34:30,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:34:30,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:34:29" (1/3) ... [2022-07-12 18:34:30,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783a24e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:34:30, skipping insertion in model container [2022-07-12 18:34:30,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:34:29" (2/3) ... [2022-07-12 18:34:30,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783a24e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:34:30, skipping insertion in model container [2022-07-12 18:34:30,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:34:30" (3/3) ... [2022-07-12 18:34:30,533 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0214.i [2022-07-12 18:34:30,546 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:34:30,547 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2022-07-12 18:34:30,591 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:34:30,598 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@6d1fe408, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@15e8c09c [2022-07-12 18:34:30,599 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2022-07-12 18:34:30,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 146 states, 85 states have (on average 1.9294117647058824) internal successors, (164), 142 states have internal predecessors, (164), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:34:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:34:30,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:30,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:34:30,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:30,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:30,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1073379816, now seen corresponding path program 1 times [2022-07-12 18:34:30,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:30,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694482296] [2022-07-12 18:34:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:30,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:30,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:30,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694482296] [2022-07-12 18:34:30,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694482296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:30,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:30,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:34:30,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879309578] [2022-07-12 18:34:30,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:30,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 18:34:30,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:30,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 18:34:30,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 18:34:30,809 INFO L87 Difference]: Start difference. First operand has 146 states, 85 states have (on average 1.9294117647058824) internal successors, (164), 142 states have internal predecessors, (164), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:34:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:30,831 INFO L93 Difference]: Finished difference Result 146 states and 163 transitions. [2022-07-12 18:34:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 18:34:30,833 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-12 18:34:30,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:30,840 INFO L225 Difference]: With dead ends: 146 [2022-07-12 18:34:30,841 INFO L226 Difference]: Without dead ends: 144 [2022-07-12 18:34:30,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 18:34:30,846 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:30,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:34:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-12 18:34:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-07-12 18:34:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 84 states have (on average 1.869047619047619) internal successors, (157), 140 states have internal predecessors, (157), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:34:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 161 transitions. [2022-07-12 18:34:30,888 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 161 transitions. Word has length 6 [2022-07-12 18:34:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:30,888 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 161 transitions. [2022-07-12 18:34:30,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:34:30,889 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 161 transitions. [2022-07-12 18:34:30,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:34:30,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:30,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:30,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 18:34:30,891 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:30,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:30,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1280367911, now seen corresponding path program 1 times [2022-07-12 18:34:30,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:30,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017224993] [2022-07-12 18:34:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:30,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:30,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:30,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017224993] [2022-07-12 18:34:30,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017224993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:30,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:30,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-12 18:34:30,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84665544] [2022-07-12 18:34:30,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:30,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:34:30,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:30,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:34:30,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:34:30,983 INFO L87 Difference]: Start difference. First operand 144 states and 161 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:34:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:31,212 INFO L93 Difference]: Finished difference Result 279 states and 312 transitions. [2022-07-12 18:34:31,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:34:31,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 18:34:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:31,219 INFO L225 Difference]: With dead ends: 279 [2022-07-12 18:34:31,220 INFO L226 Difference]: Without dead ends: 279 [2022-07-12 18:34:31,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:34:31,226 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 142 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:31,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 209 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:31,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-12 18:34:31,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 193. [2022-07-12 18:34:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 130 states have (on average 1.8461538461538463) internal successors, (240), 186 states have internal predecessors, (240), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:34:31,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 248 transitions. [2022-07-12 18:34:31,259 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 248 transitions. Word has length 7 [2022-07-12 18:34:31,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:31,259 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 248 transitions. [2022-07-12 18:34:31,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:34:31,260 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 248 transitions. [2022-07-12 18:34:31,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:34:31,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:31,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:31,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 18:34:31,261 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:31,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:31,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1280367910, now seen corresponding path program 1 times [2022-07-12 18:34:31,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:31,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286824149] [2022-07-12 18:34:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:31,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:31,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:31,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286824149] [2022-07-12 18:34:31,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286824149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:31,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:31,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:34:31,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587918182] [2022-07-12 18:34:31,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:31,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:34:31,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:31,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:34:31,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:34:31,393 INFO L87 Difference]: Start difference. First operand 193 states and 248 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:34:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:31,582 INFO L93 Difference]: Finished difference Result 342 states and 424 transitions. [2022-07-12 18:34:31,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:34:31,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 18:34:31,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:31,584 INFO L225 Difference]: With dead ends: 342 [2022-07-12 18:34:31,585 INFO L226 Difference]: Without dead ends: 342 [2022-07-12 18:34:31,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:34:31,586 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 145 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:31,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 350 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:31,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-07-12 18:34:31,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 270. [2022-07-12 18:34:31,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 201 states have (on average 1.8059701492537314) internal successors, (363), 259 states have internal predecessors, (363), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:34:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 379 transitions. [2022-07-12 18:34:31,603 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 379 transitions. Word has length 7 [2022-07-12 18:34:31,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:31,604 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 379 transitions. [2022-07-12 18:34:31,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:34:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 379 transitions. [2022-07-12 18:34:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:34:31,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:31,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:31,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 18:34:31,605 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:31,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:31,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1280367972, now seen corresponding path program 1 times [2022-07-12 18:34:31,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:31,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616430650] [2022-07-12 18:34:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:31,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:31,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:31,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:31,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616430650] [2022-07-12 18:34:31,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616430650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:31,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:31,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:34:31,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443222230] [2022-07-12 18:34:31,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:31,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:34:31,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:31,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:34:31,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:34:31,712 INFO L87 Difference]: Start difference. First operand 270 states and 379 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:34:31,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:31,854 INFO L93 Difference]: Finished difference Result 341 states and 422 transitions. [2022-07-12 18:34:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:34:31,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 18:34:31,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:31,856 INFO L225 Difference]: With dead ends: 341 [2022-07-12 18:34:31,856 INFO L226 Difference]: Without dead ends: 341 [2022-07-12 18:34:31,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:34:31,858 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 127 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:31,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 364 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:31,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-07-12 18:34:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 270. [2022-07-12 18:34:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 201 states have (on average 1.8059701492537314) internal successors, (363), 259 states have internal predecessors, (363), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 18:34:31,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 379 transitions. [2022-07-12 18:34:31,870 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 379 transitions. Word has length 7 [2022-07-12 18:34:31,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:31,870 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 379 transitions. [2022-07-12 18:34:31,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:34:31,870 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 379 transitions. [2022-07-12 18:34:31,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:34:31,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:31,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:31,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 18:34:31,872 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:31,872 INFO L85 PathProgramCache]: Analyzing trace with hash 164318064, now seen corresponding path program 1 times [2022-07-12 18:34:31,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:31,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691330927] [2022-07-12 18:34:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:31,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:31,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:31,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691330927] [2022-07-12 18:34:31,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691330927] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:31,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:31,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:34:31,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455299860] [2022-07-12 18:34:31,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:31,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:34:31,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:31,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:34:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:34:31,970 INFO L87 Difference]: Start difference. First operand 270 states and 379 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:34:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:32,119 INFO L93 Difference]: Finished difference Result 391 states and 519 transitions. [2022-07-12 18:34:32,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:34:32,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-12 18:34:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:32,123 INFO L225 Difference]: With dead ends: 391 [2022-07-12 18:34:32,124 INFO L226 Difference]: Without dead ends: 391 [2022-07-12 18:34:32,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:34:32,125 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 123 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:32,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 680 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:32,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-07-12 18:34:32,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 312. [2022-07-12 18:34:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 240 states have (on average 1.7916666666666667) internal successors, (430), 299 states have internal predecessors, (430), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 18:34:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 450 transitions. [2022-07-12 18:34:32,136 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 450 transitions. Word has length 10 [2022-07-12 18:34:32,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:32,136 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 450 transitions. [2022-07-12 18:34:32,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:34:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 450 transitions. [2022-07-12 18:34:32,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:34:32,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:32,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:32,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 18:34:32,138 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:32,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:32,138 INFO L85 PathProgramCache]: Analyzing trace with hash 162471022, now seen corresponding path program 1 times [2022-07-12 18:34:32,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:32,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498729444] [2022-07-12 18:34:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:32,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:32,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:32,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498729444] [2022-07-12 18:34:32,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498729444] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:32,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:32,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:34:32,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870562477] [2022-07-12 18:34:32,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:32,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:34:32,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:32,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:34:32,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:34:32,289 INFO L87 Difference]: Start difference. First operand 312 states and 450 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:34:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:32,485 INFO L93 Difference]: Finished difference Result 381 states and 508 transitions. [2022-07-12 18:34:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:34:32,485 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-12 18:34:32,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:32,487 INFO L225 Difference]: With dead ends: 381 [2022-07-12 18:34:32,487 INFO L226 Difference]: Without dead ends: 381 [2022-07-12 18:34:32,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:34:32,488 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 109 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:32,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 689 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:32,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-07-12 18:34:32,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 311. [2022-07-12 18:34:32,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 239 states have (on average 1.794979079497908) internal successors, (429), 298 states have internal predecessors, (429), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 18:34:32,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 449 transitions. [2022-07-12 18:34:32,497 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 449 transitions. Word has length 10 [2022-07-12 18:34:32,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:32,498 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 449 transitions. [2022-07-12 18:34:32,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:34:32,498 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 449 transitions. [2022-07-12 18:34:32,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:34:32,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:32,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:32,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 18:34:32,499 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:32,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash 798891393, now seen corresponding path program 1 times [2022-07-12 18:34:32,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:32,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192927753] [2022-07-12 18:34:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:32,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:32,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:32,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192927753] [2022-07-12 18:34:32,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192927753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:32,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:32,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:34:32,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568275129] [2022-07-12 18:34:32,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:32,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:34:32,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:32,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:34:32,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:34:32,537 INFO L87 Difference]: Start difference. First operand 311 states and 449 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:34:32,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:32,623 INFO L93 Difference]: Finished difference Result 370 states and 506 transitions. [2022-07-12 18:34:32,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:34:32,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 18:34:32,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:32,625 INFO L225 Difference]: With dead ends: 370 [2022-07-12 18:34:32,625 INFO L226 Difference]: Without dead ends: 363 [2022-07-12 18:34:32,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:34:32,626 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 74 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:32,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 237 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:32,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-12 18:34:32,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 308. [2022-07-12 18:34:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 236 states have (on average 1.7966101694915255) internal successors, (424), 295 states have internal predecessors, (424), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 18:34:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 444 transitions. [2022-07-12 18:34:32,635 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 444 transitions. Word has length 11 [2022-07-12 18:34:32,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:32,636 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 444 transitions. [2022-07-12 18:34:32,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:34:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 444 transitions. [2022-07-12 18:34:32,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 18:34:32,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:32,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:32,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 18:34:32,637 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:32,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:32,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1916999928, now seen corresponding path program 1 times [2022-07-12 18:34:32,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:32,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416024663] [2022-07-12 18:34:32,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:32,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:32,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:32,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:32,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416024663] [2022-07-12 18:34:32,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416024663] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:32,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:32,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:34:32,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736911499] [2022-07-12 18:34:32,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:32,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:34:32,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:32,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:34:32,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:34:32,700 INFO L87 Difference]: Start difference. First operand 308 states and 444 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:32,909 INFO L93 Difference]: Finished difference Result 439 states and 552 transitions. [2022-07-12 18:34:32,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:34:32,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-12 18:34:32,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:32,911 INFO L225 Difference]: With dead ends: 439 [2022-07-12 18:34:32,911 INFO L226 Difference]: Without dead ends: 439 [2022-07-12 18:34:32,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:34:32,912 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 267 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:32,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 353 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:32,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-12 18:34:32,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 308. [2022-07-12 18:34:32,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 236 states have (on average 1.771186440677966) internal successors, (418), 295 states have internal predecessors, (418), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 18:34:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 438 transitions. [2022-07-12 18:34:32,921 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 438 transitions. Word has length 13 [2022-07-12 18:34:32,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:32,921 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 438 transitions. [2022-07-12 18:34:32,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:32,928 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 438 transitions. [2022-07-12 18:34:32,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 18:34:32,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:32,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:32,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 18:34:32,929 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:32,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:32,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1916999929, now seen corresponding path program 1 times [2022-07-12 18:34:32,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:32,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032680477] [2022-07-12 18:34:32,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:32,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:33,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:33,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:33,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032680477] [2022-07-12 18:34:33,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032680477] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:33,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:33,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:34:33,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981326823] [2022-07-12 18:34:33,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:33,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:34:33,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:33,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:34:33,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:34:33,030 INFO L87 Difference]: Start difference. First operand 308 states and 438 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:33,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:33,244 INFO L93 Difference]: Finished difference Result 378 states and 484 transitions. [2022-07-12 18:34:33,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:34:33,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-12 18:34:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:33,247 INFO L225 Difference]: With dead ends: 378 [2022-07-12 18:34:33,247 INFO L226 Difference]: Without dead ends: 378 [2022-07-12 18:34:33,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:34:33,248 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 118 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:33,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 656 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:33,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-07-12 18:34:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 318. [2022-07-12 18:34:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 243 states have (on average 1.7530864197530864) internal successors, (426), 303 states have internal predecessors, (426), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-12 18:34:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 452 transitions. [2022-07-12 18:34:33,261 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 452 transitions. Word has length 13 [2022-07-12 18:34:33,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:33,261 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 452 transitions. [2022-07-12 18:34:33,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:33,262 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 452 transitions. [2022-07-12 18:34:33,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 18:34:33,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:33,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:33,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 18:34:33,263 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:33,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:33,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1917923450, now seen corresponding path program 1 times [2022-07-12 18:34:33,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:33,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441299517] [2022-07-12 18:34:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:33,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:33,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:33,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:33,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441299517] [2022-07-12 18:34:33,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441299517] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:33,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:33,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:34:33,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843358357] [2022-07-12 18:34:33,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:33,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:34:33,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:33,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:34:33,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:34:33,357 INFO L87 Difference]: Start difference. First operand 318 states and 452 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:33,575 INFO L93 Difference]: Finished difference Result 377 states and 482 transitions. [2022-07-12 18:34:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:34:33,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-12 18:34:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:33,577 INFO L225 Difference]: With dead ends: 377 [2022-07-12 18:34:33,577 INFO L226 Difference]: Without dead ends: 377 [2022-07-12 18:34:33,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:34:33,578 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 113 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:33,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 678 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-07-12 18:34:33,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 312. [2022-07-12 18:34:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 240 states have (on average 1.7625) internal successors, (423), 297 states have internal predecessors, (423), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 18:34:33,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 443 transitions. [2022-07-12 18:34:33,587 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 443 transitions. Word has length 13 [2022-07-12 18:34:33,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:33,587 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 443 transitions. [2022-07-12 18:34:33,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:33,587 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 443 transitions. [2022-07-12 18:34:33,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 18:34:33,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:33,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:33,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 18:34:33,588 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:33,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:33,589 INFO L85 PathProgramCache]: Analyzing trace with hash -60907143, now seen corresponding path program 1 times [2022-07-12 18:34:33,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:33,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179681345] [2022-07-12 18:34:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:33,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:33,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:33,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:33,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179681345] [2022-07-12 18:34:33,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179681345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:33,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:33,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:34:33,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374386378] [2022-07-12 18:34:33,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:33,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:34:33,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:33,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:34:33,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:34:33,637 INFO L87 Difference]: Start difference. First operand 312 states and 443 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:33,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:33,820 INFO L93 Difference]: Finished difference Result 489 states and 642 transitions. [2022-07-12 18:34:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:34:33,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-12 18:34:33,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:33,823 INFO L225 Difference]: With dead ends: 489 [2022-07-12 18:34:33,823 INFO L226 Difference]: Without dead ends: 489 [2022-07-12 18:34:33,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:34:33,824 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 259 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:33,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 360 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-07-12 18:34:33,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 318. [2022-07-12 18:34:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 246 states have (on average 1.7439024390243902) internal successors, (429), 303 states have internal predecessors, (429), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 18:34:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 449 transitions. [2022-07-12 18:34:33,834 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 449 transitions. Word has length 15 [2022-07-12 18:34:33,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:33,834 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 449 transitions. [2022-07-12 18:34:33,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 449 transitions. [2022-07-12 18:34:33,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 18:34:33,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:33,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:33,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 18:34:33,835 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:33,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:33,836 INFO L85 PathProgramCache]: Analyzing trace with hash -60907142, now seen corresponding path program 1 times [2022-07-12 18:34:33,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:33,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581681298] [2022-07-12 18:34:33,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:33,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:33,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:33,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:33,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581681298] [2022-07-12 18:34:33,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581681298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:33,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:33,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:34:33,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002357227] [2022-07-12 18:34:33,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:33,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:34:33,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:33,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:34:33,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:34:33,901 INFO L87 Difference]: Start difference. First operand 318 states and 449 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:34,032 INFO L93 Difference]: Finished difference Result 375 states and 473 transitions. [2022-07-12 18:34:34,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:34:34,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-12 18:34:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:34,035 INFO L225 Difference]: With dead ends: 375 [2022-07-12 18:34:34,035 INFO L226 Difference]: Without dead ends: 375 [2022-07-12 18:34:34,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:34:34,036 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 203 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:34,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 374 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:34,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-07-12 18:34:34,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 318. [2022-07-12 18:34:34,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 246 states have (on average 1.7073170731707317) internal successors, (420), 303 states have internal predecessors, (420), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 18:34:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 440 transitions. [2022-07-12 18:34:34,045 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 440 transitions. Word has length 15 [2022-07-12 18:34:34,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:34,046 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 440 transitions. [2022-07-12 18:34:34,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:34,046 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 440 transitions. [2022-07-12 18:34:34,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 18:34:34,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:34,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:34,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 18:34:34,050 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:34,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:34,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1341254785, now seen corresponding path program 1 times [2022-07-12 18:34:34,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:34,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148443321] [2022-07-12 18:34:34,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:34,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:34,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:34,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:34,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148443321] [2022-07-12 18:34:34,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148443321] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:34,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:34,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:34:34,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081945869] [2022-07-12 18:34:34,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:34,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:34:34,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:34,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:34:34,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:34:34,073 INFO L87 Difference]: Start difference. First operand 318 states and 440 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:34,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:34,160 INFO L93 Difference]: Finished difference Result 409 states and 539 transitions. [2022-07-12 18:34:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:34:34,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-07-12 18:34:34,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:34,162 INFO L225 Difference]: With dead ends: 409 [2022-07-12 18:34:34,162 INFO L226 Difference]: Without dead ends: 409 [2022-07-12 18:34:34,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:34:34,163 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 132 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:34,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 261 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:34,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-07-12 18:34:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 315. [2022-07-12 18:34:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 246 states have (on average 1.6829268292682926) internal successors, (414), 300 states have internal predecessors, (414), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 18:34:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 434 transitions. [2022-07-12 18:34:34,171 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 434 transitions. Word has length 19 [2022-07-12 18:34:34,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:34,172 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 434 transitions. [2022-07-12 18:34:34,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:34,172 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 434 transitions. [2022-07-12 18:34:34,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 18:34:34,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:34,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:34,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 18:34:34,173 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:34,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:34,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1341254786, now seen corresponding path program 1 times [2022-07-12 18:34:34,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:34,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854650175] [2022-07-12 18:34:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:34,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:34,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:34,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:34,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854650175] [2022-07-12 18:34:34,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854650175] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:34,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:34,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:34:34,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059933778] [2022-07-12 18:34:34,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:34,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:34:34,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:34,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:34:34,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:34:34,230 INFO L87 Difference]: Start difference. First operand 315 states and 434 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:34,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:34,407 INFO L93 Difference]: Finished difference Result 532 states and 662 transitions. [2022-07-12 18:34:34,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:34:34,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-07-12 18:34:34,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:34,413 INFO L225 Difference]: With dead ends: 532 [2022-07-12 18:34:34,414 INFO L226 Difference]: Without dead ends: 532 [2022-07-12 18:34:34,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:34:34,415 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 283 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:34,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 459 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:34,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-07-12 18:34:34,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 318. [2022-07-12 18:34:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 250 states have (on average 1.664) internal successors, (416), 303 states have internal predecessors, (416), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 18:34:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 436 transitions. [2022-07-12 18:34:34,427 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 436 transitions. Word has length 19 [2022-07-12 18:34:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:34,428 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 436 transitions. [2022-07-12 18:34:34,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 436 transitions. [2022-07-12 18:34:34,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:34:34,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:34,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:34,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 18:34:34,431 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:34,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:34,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1370774597, now seen corresponding path program 1 times [2022-07-12 18:34:34,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:34,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347654290] [2022-07-12 18:34:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:34,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:34,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:34,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:34,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347654290] [2022-07-12 18:34:34,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347654290] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:34,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:34,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:34:34,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907335542] [2022-07-12 18:34:34,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:34,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:34:34,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:34,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:34:34,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:34:34,501 INFO L87 Difference]: Start difference. First operand 318 states and 436 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:34,644 INFO L93 Difference]: Finished difference Result 531 states and 660 transitions. [2022-07-12 18:34:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:34:34,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-07-12 18:34:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:34,647 INFO L225 Difference]: With dead ends: 531 [2022-07-12 18:34:34,647 INFO L226 Difference]: Without dead ends: 531 [2022-07-12 18:34:34,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:34:34,648 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 344 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:34,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 439 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-07-12 18:34:34,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 320. [2022-07-12 18:34:34,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 252 states have (on average 1.6587301587301588) internal successors, (418), 305 states have internal predecessors, (418), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 18:34:34,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 438 transitions. [2022-07-12 18:34:34,657 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 438 transitions. Word has length 20 [2022-07-12 18:34:34,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:34,657 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 438 transitions. [2022-07-12 18:34:34,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:34,657 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 438 transitions. [2022-07-12 18:34:34,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:34:34,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:34,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:34,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 18:34:34,658 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:34,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1370718893, now seen corresponding path program 1 times [2022-07-12 18:34:34,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:34,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087118931] [2022-07-12 18:34:34,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:34,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:34,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:34,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:34,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087118931] [2022-07-12 18:34:34,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087118931] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:34,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:34,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:34:34,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079984457] [2022-07-12 18:34:34,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:34,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:34:34,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:34,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:34:34,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:34:34,719 INFO L87 Difference]: Start difference. First operand 320 states and 438 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:34,799 INFO L93 Difference]: Finished difference Result 540 states and 713 transitions. [2022-07-12 18:34:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:34:34,800 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-07-12 18:34:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:34,802 INFO L225 Difference]: With dead ends: 540 [2022-07-12 18:34:34,802 INFO L226 Difference]: Without dead ends: 540 [2022-07-12 18:34:34,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:34:34,803 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 336 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:34,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 1235 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:34:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-07-12 18:34:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 348. [2022-07-12 18:34:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 275 states have (on average 1.6254545454545455) internal successors, (447), 329 states have internal predecessors, (447), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-12 18:34:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 477 transitions. [2022-07-12 18:34:34,813 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 477 transitions. Word has length 20 [2022-07-12 18:34:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:34,814 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 477 transitions. [2022-07-12 18:34:34,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 477 transitions. [2022-07-12 18:34:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:34:34,815 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:34,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:34,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 18:34:34,815 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:34,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1370716971, now seen corresponding path program 1 times [2022-07-12 18:34:34,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:34,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221038] [2022-07-12 18:34:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:34,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:34,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:34,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221038] [2022-07-12 18:34:34,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221038] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:34,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:34,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:34:34,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115489702] [2022-07-12 18:34:34,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:34,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:34:34,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:34,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:34:34,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:34:34,897 INFO L87 Difference]: Start difference. First operand 348 states and 477 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:34,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:34,988 INFO L93 Difference]: Finished difference Result 530 states and 699 transitions. [2022-07-12 18:34:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:34:34,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-07-12 18:34:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:34,993 INFO L225 Difference]: With dead ends: 530 [2022-07-12 18:34:34,993 INFO L226 Difference]: Without dead ends: 530 [2022-07-12 18:34:34,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:34:34,994 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 323 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:34,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 1233 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:34:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-07-12 18:34:35,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 346. [2022-07-12 18:34:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 273 states have (on average 1.6227106227106227) internal successors, (443), 327 states have internal predecessors, (443), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-12 18:34:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 473 transitions. [2022-07-12 18:34:35,004 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 473 transitions. Word has length 20 [2022-07-12 18:34:35,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:35,004 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 473 transitions. [2022-07-12 18:34:35,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:35,004 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 473 transitions. [2022-07-12 18:34:35,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:34:35,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:35,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:35,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 18:34:35,005 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:35,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:35,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1241636174, now seen corresponding path program 1 times [2022-07-12 18:34:35,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:35,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288239924] [2022-07-12 18:34:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:35,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:35,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:35,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:35,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288239924] [2022-07-12 18:34:35,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288239924] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:35,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:35,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:34:35,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551430841] [2022-07-12 18:34:35,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:35,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:34:35,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:35,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:34:35,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:34:35,049 INFO L87 Difference]: Start difference. First operand 346 states and 473 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:35,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:35,198 INFO L93 Difference]: Finished difference Result 572 states and 718 transitions. [2022-07-12 18:34:35,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:34:35,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-07-12 18:34:35,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:35,201 INFO L225 Difference]: With dead ends: 572 [2022-07-12 18:34:35,201 INFO L226 Difference]: Without dead ends: 572 [2022-07-12 18:34:35,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:34:35,202 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 355 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:35,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 430 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:35,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-07-12 18:34:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 350. [2022-07-12 18:34:35,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 277 states have (on average 1.6137184115523466) internal successors, (447), 331 states have internal predecessors, (447), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-12 18:34:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 477 transitions. [2022-07-12 18:34:35,211 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 477 transitions. Word has length 20 [2022-07-12 18:34:35,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:35,212 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 477 transitions. [2022-07-12 18:34:35,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 477 transitions. [2022-07-12 18:34:35,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:34:35,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:35,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:35,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 18:34:35,213 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:35,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1241634252, now seen corresponding path program 1 times [2022-07-12 18:34:35,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:35,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227209271] [2022-07-12 18:34:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:35,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:35,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:35,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:35,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227209271] [2022-07-12 18:34:35,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227209271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:35,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:35,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:34:35,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003870673] [2022-07-12 18:34:35,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:35,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:34:35,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:35,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:34:35,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:34:35,292 INFO L87 Difference]: Start difference. First operand 350 states and 477 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:35,374 INFO L93 Difference]: Finished difference Result 527 states and 693 transitions. [2022-07-12 18:34:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:34:35,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-07-12 18:34:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:35,378 INFO L225 Difference]: With dead ends: 527 [2022-07-12 18:34:35,378 INFO L226 Difference]: Without dead ends: 527 [2022-07-12 18:34:35,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:34:35,379 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 330 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:35,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 1461 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:34:35,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-07-12 18:34:35,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 345. [2022-07-12 18:34:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 273 states have (on average 1.6080586080586081) internal successors, (439), 326 states have internal predecessors, (439), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-12 18:34:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 469 transitions. [2022-07-12 18:34:35,392 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 469 transitions. Word has length 20 [2022-07-12 18:34:35,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:35,392 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 469 transitions. [2022-07-12 18:34:35,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 469 transitions. [2022-07-12 18:34:35,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 18:34:35,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:35,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:35,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 18:34:35,394 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:35,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash 712638781, now seen corresponding path program 1 times [2022-07-12 18:34:35,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:35,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044599608] [2022-07-12 18:34:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:35,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:35,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:35,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:35,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044599608] [2022-07-12 18:34:35,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044599608] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:35,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:35,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 18:34:35,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265386830] [2022-07-12 18:34:35,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:35,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:34:35,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:35,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:34:35,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:34:35,627 INFO L87 Difference]: Start difference. First operand 345 states and 469 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:36,183 INFO L93 Difference]: Finished difference Result 649 states and 845 transitions. [2022-07-12 18:34:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:34:36,184 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-07-12 18:34:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:36,186 INFO L225 Difference]: With dead ends: 649 [2022-07-12 18:34:36,186 INFO L226 Difference]: Without dead ends: 647 [2022-07-12 18:34:36,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:34:36,187 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 445 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:36,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 1228 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:36,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-07-12 18:34:36,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 339. [2022-07-12 18:34:36,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 267 states have (on average 1.6029962546816479) internal successors, (428), 320 states have internal predecessors, (428), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-12 18:34:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 458 transitions. [2022-07-12 18:34:36,199 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 458 transitions. Word has length 21 [2022-07-12 18:34:36,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:36,200 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 458 transitions. [2022-07-12 18:34:36,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:36,200 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 458 transitions. [2022-07-12 18:34:36,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 18:34:36,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:36,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:36,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 18:34:36,201 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:36,201 INFO L85 PathProgramCache]: Analyzing trace with hash 163984267, now seen corresponding path program 1 times [2022-07-12 18:34:36,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:36,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180023775] [2022-07-12 18:34:36,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:36,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:36,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:36,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:36,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180023775] [2022-07-12 18:34:36,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180023775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:36,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:36,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:34:36,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132395372] [2022-07-12 18:34:36,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:36,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:34:36,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:36,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:34:36,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:34:36,260 INFO L87 Difference]: Start difference. First operand 339 states and 458 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:36,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:36,422 INFO L93 Difference]: Finished difference Result 557 states and 693 transitions. [2022-07-12 18:34:36,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:34:36,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-07-12 18:34:36,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:36,425 INFO L225 Difference]: With dead ends: 557 [2022-07-12 18:34:36,425 INFO L226 Difference]: Without dead ends: 557 [2022-07-12 18:34:36,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:34:36,426 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 347 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:36,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 430 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-07-12 18:34:36,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 332. [2022-07-12 18:34:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 261 states have (on average 1.6091954022988506) internal successors, (420), 313 states have internal predecessors, (420), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-12 18:34:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 450 transitions. [2022-07-12 18:34:36,443 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 450 transitions. Word has length 21 [2022-07-12 18:34:36,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:36,444 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 450 transitions. [2022-07-12 18:34:36,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:36,444 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 450 transitions. [2022-07-12 18:34:36,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 18:34:36,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:36,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:36,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 18:34:36,445 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:36,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:36,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1953708264, now seen corresponding path program 1 times [2022-07-12 18:34:36,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:36,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305155921] [2022-07-12 18:34:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:36,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:36,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:36,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:36,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305155921] [2022-07-12 18:34:36,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305155921] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:36,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:36,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:34:36,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900913030] [2022-07-12 18:34:36,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:36,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:34:36,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:36,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:34:36,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:34:36,486 INFO L87 Difference]: Start difference. First operand 332 states and 450 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:36,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:36,662 INFO L93 Difference]: Finished difference Result 494 states and 639 transitions. [2022-07-12 18:34:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:34:36,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-07-12 18:34:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:36,665 INFO L225 Difference]: With dead ends: 494 [2022-07-12 18:34:36,665 INFO L226 Difference]: Without dead ends: 494 [2022-07-12 18:34:36,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:34:36,666 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 227 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:36,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 352 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-07-12 18:34:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 360. [2022-07-12 18:34:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 289 states have (on average 1.6332179930795847) internal successors, (472), 341 states have internal predecessors, (472), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-12 18:34:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 502 transitions. [2022-07-12 18:34:36,675 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 502 transitions. Word has length 23 [2022-07-12 18:34:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:36,675 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 502 transitions. [2022-07-12 18:34:36,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 502 transitions. [2022-07-12 18:34:36,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 18:34:36,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:36,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:36,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-12 18:34:36,676 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:36,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:36,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1953708265, now seen corresponding path program 1 times [2022-07-12 18:34:36,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:36,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913624332] [2022-07-12 18:34:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:36,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:36,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:36,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:36,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913624332] [2022-07-12 18:34:36,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913624332] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:36,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:36,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:34:36,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78192597] [2022-07-12 18:34:36,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:36,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:34:36,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:36,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:34:36,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:34:36,802 INFO L87 Difference]: Start difference. First operand 360 states and 502 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:37,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:37,024 INFO L93 Difference]: Finished difference Result 419 states and 533 transitions. [2022-07-12 18:34:37,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:34:37,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-07-12 18:34:37,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:37,026 INFO L225 Difference]: With dead ends: 419 [2022-07-12 18:34:37,026 INFO L226 Difference]: Without dead ends: 419 [2022-07-12 18:34:37,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:34:37,027 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 378 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:37,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 449 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:37,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-07-12 18:34:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 360. [2022-07-12 18:34:37,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 289 states have (on average 1.602076124567474) internal successors, (463), 341 states have internal predecessors, (463), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-12 18:34:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 493 transitions. [2022-07-12 18:34:37,036 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 493 transitions. Word has length 23 [2022-07-12 18:34:37,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:37,036 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 493 transitions. [2022-07-12 18:34:37,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:37,037 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 493 transitions. [2022-07-12 18:34:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 18:34:37,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:37,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:37,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-12 18:34:37,039 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:37,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:37,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1811064258, now seen corresponding path program 1 times [2022-07-12 18:34:37,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:37,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009448097] [2022-07-12 18:34:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:37,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:37,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:37,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:37,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009448097] [2022-07-12 18:34:37,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009448097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:37,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:37,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 18:34:37,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412567580] [2022-07-12 18:34:37,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:37,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:34:37,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:37,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:34:37,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:34:37,220 INFO L87 Difference]: Start difference. First operand 360 states and 493 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:37,538 INFO L93 Difference]: Finished difference Result 799 states and 1037 transitions. [2022-07-12 18:34:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:34:37,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-07-12 18:34:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:37,541 INFO L225 Difference]: With dead ends: 799 [2022-07-12 18:34:37,541 INFO L226 Difference]: Without dead ends: 799 [2022-07-12 18:34:37,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:34:37,542 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 647 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:37,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1187 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:37,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-07-12 18:34:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 392. [2022-07-12 18:34:37,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 321 states have (on average 1.5545171339563864) internal successors, (499), 371 states have internal predecessors, (499), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-12 18:34:37,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 529 transitions. [2022-07-12 18:34:37,553 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 529 transitions. Word has length 24 [2022-07-12 18:34:37,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:37,553 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 529 transitions. [2022-07-12 18:34:37,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 529 transitions. [2022-07-12 18:34:37,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:34:37,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:37,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:37,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-12 18:34:37,554 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:37,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:37,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1927577074, now seen corresponding path program 1 times [2022-07-12 18:34:37,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:37,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194662049] [2022-07-12 18:34:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:37,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:37,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:37,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:37,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194662049] [2022-07-12 18:34:37,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194662049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:37,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:37,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 18:34:37,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329792489] [2022-07-12 18:34:37,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:37,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:34:37,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:37,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:34:37,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:34:37,693 INFO L87 Difference]: Start difference. First operand 392 states and 529 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:37,943 INFO L93 Difference]: Finished difference Result 632 states and 811 transitions. [2022-07-12 18:34:37,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:34:37,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-07-12 18:34:37,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:37,945 INFO L225 Difference]: With dead ends: 632 [2022-07-12 18:34:37,946 INFO L226 Difference]: Without dead ends: 632 [2022-07-12 18:34:37,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:34:37,946 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 241 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:37,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1327 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:37,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-07-12 18:34:37,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 394. [2022-07-12 18:34:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 323 states have (on average 1.5510835913312693) internal successors, (501), 373 states have internal predecessors, (501), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-12 18:34:37,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 531 transitions. [2022-07-12 18:34:37,955 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 531 transitions. Word has length 25 [2022-07-12 18:34:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:37,956 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 531 transitions. [2022-07-12 18:34:37,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:37,956 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 531 transitions. [2022-07-12 18:34:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 18:34:37,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:37,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:37,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-12 18:34:37,957 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash -970840895, now seen corresponding path program 1 times [2022-07-12 18:34:37,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:37,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654239458] [2022-07-12 18:34:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:37,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:38,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:38,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:38,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654239458] [2022-07-12 18:34:38,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654239458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:38,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:38,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:34:38,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726201827] [2022-07-12 18:34:38,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:38,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:34:38,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:38,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:34:38,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:34:38,047 INFO L87 Difference]: Start difference. First operand 394 states and 531 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:38,342 INFO L93 Difference]: Finished difference Result 515 states and 640 transitions. [2022-07-12 18:34:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:34:38,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-07-12 18:34:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:38,344 INFO L225 Difference]: With dead ends: 515 [2022-07-12 18:34:38,344 INFO L226 Difference]: Without dead ends: 515 [2022-07-12 18:34:38,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:34:38,345 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 506 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:38,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 415 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-07-12 18:34:38,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 405. [2022-07-12 18:34:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 339 states have (on average 1.5309734513274336) internal successors, (519), 383 states have internal predecessors, (519), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2022-07-12 18:34:38,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 552 transitions. [2022-07-12 18:34:38,359 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 552 transitions. Word has length 26 [2022-07-12 18:34:38,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:38,360 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 552 transitions. [2022-07-12 18:34:38,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:38,360 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 552 transitions. [2022-07-12 18:34:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:34:38,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:38,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:38,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-12 18:34:38,361 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:38,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:38,362 INFO L85 PathProgramCache]: Analyzing trace with hash 622100015, now seen corresponding path program 1 times [2022-07-12 18:34:38,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:38,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178408331] [2022-07-12 18:34:38,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:38,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:38,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:38,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:38,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178408331] [2022-07-12 18:34:38,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178408331] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:38,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:38,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:34:38,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053928549] [2022-07-12 18:34:38,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:38,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:34:38,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:38,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:34:38,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:34:38,430 INFO L87 Difference]: Start difference. First operand 405 states and 552 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:38,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:38,555 INFO L93 Difference]: Finished difference Result 461 states and 604 transitions. [2022-07-12 18:34:38,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:34:38,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-07-12 18:34:38,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:38,557 INFO L225 Difference]: With dead ends: 461 [2022-07-12 18:34:38,557 INFO L226 Difference]: Without dead ends: 461 [2022-07-12 18:34:38,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:34:38,558 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 151 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:38,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 528 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-07-12 18:34:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 405. [2022-07-12 18:34:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 339 states have (on average 1.528023598820059) internal successors, (518), 383 states have internal predecessors, (518), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2022-07-12 18:34:38,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 551 transitions. [2022-07-12 18:34:38,569 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 551 transitions. Word has length 27 [2022-07-12 18:34:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:38,569 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 551 transitions. [2022-07-12 18:34:38,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 551 transitions. [2022-07-12 18:34:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:34:38,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:38,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:38,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-12 18:34:38,571 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:38,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:38,571 INFO L85 PathProgramCache]: Analyzing trace with hash -31296654, now seen corresponding path program 1 times [2022-07-12 18:34:38,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:38,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465151611] [2022-07-12 18:34:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:38,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:38,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:38,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:38,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465151611] [2022-07-12 18:34:38,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465151611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:38,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:38,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:34:38,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076029480] [2022-07-12 18:34:38,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:34:38,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:38,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:34:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:34:38,660 INFO L87 Difference]: Start difference. First operand 405 states and 551 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:38,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:38,803 INFO L93 Difference]: Finished difference Result 442 states and 562 transitions. [2022-07-12 18:34:38,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:34:38,803 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-07-12 18:34:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:38,805 INFO L225 Difference]: With dead ends: 442 [2022-07-12 18:34:38,805 INFO L226 Difference]: Without dead ends: 442 [2022-07-12 18:34:38,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:34:38,806 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 424 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:38,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 724 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-07-12 18:34:38,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 403. [2022-07-12 18:34:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 339 states have (on average 1.5162241887905605) internal successors, (514), 381 states have internal predecessors, (514), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2022-07-12 18:34:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 547 transitions. [2022-07-12 18:34:38,814 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 547 transitions. Word has length 27 [2022-07-12 18:34:38,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:38,815 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 547 transitions. [2022-07-12 18:34:38,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:38,815 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 547 transitions. [2022-07-12 18:34:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 18:34:38,815 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:38,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:38,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-12 18:34:38,816 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:38,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2105231472, now seen corresponding path program 1 times [2022-07-12 18:34:38,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:38,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066353937] [2022-07-12 18:34:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:38,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:38,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:38,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:38,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066353937] [2022-07-12 18:34:38,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066353937] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:38,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:38,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:34:38,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062174380] [2022-07-12 18:34:38,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:38,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:34:38,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:38,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:34:38,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:34:38,881 INFO L87 Difference]: Start difference. First operand 403 states and 547 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:39,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:39,034 INFO L93 Difference]: Finished difference Result 528 states and 692 transitions. [2022-07-12 18:34:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:34:39,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-07-12 18:34:39,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:39,037 INFO L225 Difference]: With dead ends: 528 [2022-07-12 18:34:39,037 INFO L226 Difference]: Without dead ends: 528 [2022-07-12 18:34:39,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:34:39,038 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 178 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:39,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 501 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:39,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-07-12 18:34:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 441. [2022-07-12 18:34:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 373 states have (on average 1.5120643431635388) internal successors, (564), 417 states have internal predecessors, (564), 13 states have call successors, (13), 6 states have call predecessors, (13), 12 states have return successors, (26), 17 states have call predecessors, (26), 13 states have call successors, (26) [2022-07-12 18:34:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 603 transitions. [2022-07-12 18:34:39,046 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 603 transitions. Word has length 28 [2022-07-12 18:34:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:39,046 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 603 transitions. [2022-07-12 18:34:39,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 603 transitions. [2022-07-12 18:34:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 18:34:39,047 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:39,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:39,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-12 18:34:39,047 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:39,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:39,048 INFO L85 PathProgramCache]: Analyzing trace with hash -11312492, now seen corresponding path program 1 times [2022-07-12 18:34:39,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:39,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502021680] [2022-07-12 18:34:39,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:39,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:39,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:39,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:39,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502021680] [2022-07-12 18:34:39,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502021680] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:39,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:39,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:34:39,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718225594] [2022-07-12 18:34:39,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:39,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:34:39,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:39,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:34:39,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:34:39,142 INFO L87 Difference]: Start difference. First operand 441 states and 603 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:39,423 INFO L93 Difference]: Finished difference Result 552 states and 688 transitions. [2022-07-12 18:34:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:34:39,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-07-12 18:34:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:39,425 INFO L225 Difference]: With dead ends: 552 [2022-07-12 18:34:39,425 INFO L226 Difference]: Without dead ends: 552 [2022-07-12 18:34:39,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:34:39,426 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 719 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:39,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 363 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-07-12 18:34:39,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 444. [2022-07-12 18:34:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 377 states have (on average 1.5013262599469497) internal successors, (566), 418 states have internal predecessors, (566), 14 states have call successors, (14), 6 states have call predecessors, (14), 12 states have return successors, (28), 19 states have call predecessors, (28), 14 states have call successors, (28) [2022-07-12 18:34:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 608 transitions. [2022-07-12 18:34:39,434 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 608 transitions. Word has length 29 [2022-07-12 18:34:39,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:39,434 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 608 transitions. [2022-07-12 18:34:39,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:39,434 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 608 transitions. [2022-07-12 18:34:39,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:34:39,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:39,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:39,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-12 18:34:39,437 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:39,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:39,438 INFO L85 PathProgramCache]: Analyzing trace with hash 880183511, now seen corresponding path program 1 times [2022-07-12 18:34:39,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:39,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580813584] [2022-07-12 18:34:39,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:39,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:39,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:39,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:39,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580813584] [2022-07-12 18:34:39,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580813584] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:39,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:39,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:34:39,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795582316] [2022-07-12 18:34:39,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:39,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:34:39,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:39,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:34:39,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:34:39,483 INFO L87 Difference]: Start difference. First operand 444 states and 608 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:39,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:39,521 INFO L93 Difference]: Finished difference Result 919 states and 1272 transitions. [2022-07-12 18:34:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:34:39,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-07-12 18:34:39,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:39,525 INFO L225 Difference]: With dead ends: 919 [2022-07-12 18:34:39,526 INFO L226 Difference]: Without dead ends: 919 [2022-07-12 18:34:39,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:34:39,526 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 212 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:39,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 734 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:34:39,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-07-12 18:34:39,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 549. [2022-07-12 18:34:39,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 482 states have (on average 1.5145228215767634) internal successors, (730), 516 states have internal predecessors, (730), 14 states have call successors, (14), 6 states have call predecessors, (14), 12 states have return successors, (28), 26 states have call predecessors, (28), 14 states have call successors, (28) [2022-07-12 18:34:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 772 transitions. [2022-07-12 18:34:39,539 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 772 transitions. Word has length 30 [2022-07-12 18:34:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:39,539 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 772 transitions. [2022-07-12 18:34:39,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 772 transitions. [2022-07-12 18:34:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:34:39,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:39,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:39,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-12 18:34:39,540 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:39,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:39,541 INFO L85 PathProgramCache]: Analyzing trace with hash 880185433, now seen corresponding path program 1 times [2022-07-12 18:34:39,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:39,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514494597] [2022-07-12 18:34:39,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:39,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:39,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:39,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:39,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514494597] [2022-07-12 18:34:39,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514494597] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:39,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:39,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:34:39,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152188408] [2022-07-12 18:34:39,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:39,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:34:39,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:39,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:34:39,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:34:39,624 INFO L87 Difference]: Start difference. First operand 549 states and 772 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:39,878 INFO L93 Difference]: Finished difference Result 1117 states and 1535 transitions. [2022-07-12 18:34:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:34:39,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-07-12 18:34:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:39,882 INFO L225 Difference]: With dead ends: 1117 [2022-07-12 18:34:39,882 INFO L226 Difference]: Without dead ends: 1117 [2022-07-12 18:34:39,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:34:39,883 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 458 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:39,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 1202 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:39,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-07-12 18:34:39,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 587. [2022-07-12 18:34:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 520 states have (on average 1.5096153846153846) internal successors, (785), 554 states have internal predecessors, (785), 14 states have call successors, (14), 6 states have call predecessors, (14), 12 states have return successors, (28), 26 states have call predecessors, (28), 14 states have call successors, (28) [2022-07-12 18:34:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 827 transitions. [2022-07-12 18:34:39,900 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 827 transitions. Word has length 30 [2022-07-12 18:34:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:39,901 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 827 transitions. [2022-07-12 18:34:39,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 827 transitions. [2022-07-12 18:34:39,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:34:39,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:39,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:39,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-12 18:34:39,902 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:39,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:39,902 INFO L85 PathProgramCache]: Analyzing trace with hash 197854354, now seen corresponding path program 1 times [2022-07-12 18:34:39,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:39,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942730053] [2022-07-12 18:34:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:39,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:39,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:39,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:39,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942730053] [2022-07-12 18:34:39,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942730053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:39,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:39,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:34:39,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939023268] [2022-07-12 18:34:39,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:39,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:34:39,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:39,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:34:39,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:34:39,993 INFO L87 Difference]: Start difference. First operand 587 states and 827 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:40,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:40,430 INFO L93 Difference]: Finished difference Result 1044 states and 1446 transitions. [2022-07-12 18:34:40,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:34:40,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-07-12 18:34:40,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:40,434 INFO L225 Difference]: With dead ends: 1044 [2022-07-12 18:34:40,434 INFO L226 Difference]: Without dead ends: 1044 [2022-07-12 18:34:40,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:34:40,434 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 375 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:40,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 800 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:34:40,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-07-12 18:34:40,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 630. [2022-07-12 18:34:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 559 states have (on average 1.4901610017889089) internal successors, (833), 594 states have internal predecessors, (833), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 28 states have call predecessors, (32), 16 states have call successors, (32) [2022-07-12 18:34:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 881 transitions. [2022-07-12 18:34:40,448 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 881 transitions. Word has length 30 [2022-07-12 18:34:40,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:40,448 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 881 transitions. [2022-07-12 18:34:40,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 881 transitions. [2022-07-12 18:34:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:34:40,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:40,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:40,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-12 18:34:40,449 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:40,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:40,450 INFO L85 PathProgramCache]: Analyzing trace with hash 471361208, now seen corresponding path program 1 times [2022-07-12 18:34:40,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:40,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716118896] [2022-07-12 18:34:40,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:40,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:40,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:40,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:40,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716118896] [2022-07-12 18:34:40,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716118896] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:40,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:40,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:34:40,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731593035] [2022-07-12 18:34:40,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:40,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:34:40,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:40,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:34:40,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:34:40,495 INFO L87 Difference]: Start difference. First operand 630 states and 881 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:40,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:40,538 INFO L93 Difference]: Finished difference Result 925 states and 1259 transitions. [2022-07-12 18:34:40,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:34:40,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-07-12 18:34:40,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:40,542 INFO L225 Difference]: With dead ends: 925 [2022-07-12 18:34:40,542 INFO L226 Difference]: Without dead ends: 925 [2022-07-12 18:34:40,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:34:40,543 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 191 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:40,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 882 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:34:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-07-12 18:34:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 622. [2022-07-12 18:34:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 551 states have (on average 1.4900181488203266) internal successors, (821), 586 states have internal predecessors, (821), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 28 states have call predecessors, (32), 16 states have call successors, (32) [2022-07-12 18:34:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 869 transitions. [2022-07-12 18:34:40,555 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 869 transitions. Word has length 30 [2022-07-12 18:34:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:40,556 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 869 transitions. [2022-07-12 18:34:40,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:40,556 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 869 transitions. [2022-07-12 18:34:40,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:34:40,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:40,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:40,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-12 18:34:40,557 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:40,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:40,557 INFO L85 PathProgramCache]: Analyzing trace with hash 473206328, now seen corresponding path program 1 times [2022-07-12 18:34:40,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:40,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730885186] [2022-07-12 18:34:40,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:40,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:40,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:40,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:40,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730885186] [2022-07-12 18:34:40,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730885186] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:40,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:40,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:34:40,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748101723] [2022-07-12 18:34:40,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:40,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:34:40,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:40,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:34:40,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:34:40,637 INFO L87 Difference]: Start difference. First operand 622 states and 869 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:40,868 INFO L93 Difference]: Finished difference Result 1101 states and 1484 transitions. [2022-07-12 18:34:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:34:40,869 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-07-12 18:34:40,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:40,873 INFO L225 Difference]: With dead ends: 1101 [2022-07-12 18:34:40,873 INFO L226 Difference]: Without dead ends: 1101 [2022-07-12 18:34:40,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:34:40,873 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 419 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:40,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 1377 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:40,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-07-12 18:34:40,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 589. [2022-07-12 18:34:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 521 states have (on average 1.4510556621881) internal successors, (756), 553 states have internal predecessors, (756), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 28 states have call predecessors, (32), 16 states have call successors, (32) [2022-07-12 18:34:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 804 transitions. [2022-07-12 18:34:40,886 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 804 transitions. Word has length 30 [2022-07-12 18:34:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:40,887 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 804 transitions. [2022-07-12 18:34:40,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 804 transitions. [2022-07-12 18:34:40,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 18:34:40,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:40,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:40,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-12 18:34:40,888 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:40,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:40,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1838517875, now seen corresponding path program 1 times [2022-07-12 18:34:40,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:40,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292154697] [2022-07-12 18:34:40,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:40,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:41,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:41,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:41,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292154697] [2022-07-12 18:34:41,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292154697] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:41,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:41,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:34:41,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112993945] [2022-07-12 18:34:41,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:41,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:34:41,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:41,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:34:41,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:34:41,025 INFO L87 Difference]: Start difference. First operand 589 states and 804 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:41,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:41,366 INFO L93 Difference]: Finished difference Result 771 states and 993 transitions. [2022-07-12 18:34:41,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:34:41,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-07-12 18:34:41,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:41,369 INFO L225 Difference]: With dead ends: 771 [2022-07-12 18:34:41,369 INFO L226 Difference]: Without dead ends: 771 [2022-07-12 18:34:41,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:34:41,370 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 598 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:41,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 566 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:34:41,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-07-12 18:34:41,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 589. [2022-07-12 18:34:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 521 states have (on average 1.4433781190019195) internal successors, (752), 553 states have internal predecessors, (752), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 28 states have call predecessors, (32), 16 states have call successors, (32) [2022-07-12 18:34:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 800 transitions. [2022-07-12 18:34:41,384 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 800 transitions. Word has length 31 [2022-07-12 18:34:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:41,384 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 800 transitions. [2022-07-12 18:34:41,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:41,385 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 800 transitions. [2022-07-12 18:34:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 18:34:41,385 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:41,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:41,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-12 18:34:41,386 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:41,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:41,386 INFO L85 PathProgramCache]: Analyzing trace with hash -250351879, now seen corresponding path program 1 times [2022-07-12 18:34:41,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:41,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880814026] [2022-07-12 18:34:41,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:41,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:41,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:41,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:41,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880814026] [2022-07-12 18:34:41,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880814026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:41,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:41,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:34:41,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295288368] [2022-07-12 18:34:41,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:41,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:34:41,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:41,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:34:41,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:34:41,538 INFO L87 Difference]: Start difference. First operand 589 states and 800 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:41,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:41,718 INFO L93 Difference]: Finished difference Result 620 states and 832 transitions. [2022-07-12 18:34:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:34:41,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-07-12 18:34:41,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:41,721 INFO L225 Difference]: With dead ends: 620 [2022-07-12 18:34:41,721 INFO L226 Difference]: Without dead ends: 620 [2022-07-12 18:34:41,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:34:41,721 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 94 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:41,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 653 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:41,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-07-12 18:34:41,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 568. [2022-07-12 18:34:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 500 states have (on average 1.45) internal successors, (725), 534 states have internal predecessors, (725), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 26 states have call predecessors, (32), 16 states have call successors, (32) [2022-07-12 18:34:41,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 773 transitions. [2022-07-12 18:34:41,737 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 773 transitions. Word has length 32 [2022-07-12 18:34:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:41,737 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 773 transitions. [2022-07-12 18:34:41,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:41,737 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 773 transitions. [2022-07-12 18:34:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:34:41,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:41,738 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:41,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-12 18:34:41,739 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:41,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1439584979, now seen corresponding path program 1 times [2022-07-12 18:34:41,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:41,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214464948] [2022-07-12 18:34:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:41,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:41,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:41,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-12 18:34:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:34:41,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:41,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214464948] [2022-07-12 18:34:41,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214464948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:34:41,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490647334] [2022-07-12 18:34:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:41,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:34:41,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:34:42,003 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:34:42,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 18:34:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:42,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 18:34:42,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:42,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:34:42,641 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:34:42,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-07-12 18:34:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:34:42,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490647334] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:34:42,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:34:42,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 8] total 26 [2022-07-12 18:34:42,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658833225] [2022-07-12 18:34:42,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:34:42,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 18:34:42,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:42,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 18:34:42,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:34:42,861 INFO L87 Difference]: Start difference. First operand 568 states and 773 transitions. Second operand has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:34:43,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:43,662 INFO L93 Difference]: Finished difference Result 856 states and 1118 transitions. [2022-07-12 18:34:43,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:34:43,663 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2022-07-12 18:34:43,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:43,666 INFO L225 Difference]: With dead ends: 856 [2022-07-12 18:34:43,666 INFO L226 Difference]: Without dead ends: 856 [2022-07-12 18:34:43,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 18:34:43,667 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 1465 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:43,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1469 Valid, 2055 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:34:43,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-07-12 18:34:43,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 563. [2022-07-12 18:34:43,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 496 states have (on average 1.4375) internal successors, (713), 531 states have internal predecessors, (713), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 24 states have call predecessors, (32), 16 states have call successors, (32) [2022-07-12 18:34:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 761 transitions. [2022-07-12 18:34:43,697 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 761 transitions. Word has length 40 [2022-07-12 18:34:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:43,697 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 761 transitions. [2022-07-12 18:34:43,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:34:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 761 transitions. [2022-07-12 18:34:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:34:43,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:43,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:43,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 18:34:43,900 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,SelfDestructingSolverStorable37 [2022-07-12 18:34:43,901 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:43,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:43,901 INFO L85 PathProgramCache]: Analyzing trace with hash 112861475, now seen corresponding path program 1 times [2022-07-12 18:34:43,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:43,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848377288] [2022-07-12 18:34:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:43,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:43,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:43,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:43,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848377288] [2022-07-12 18:34:43,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848377288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:43,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:43,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:34:43,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880197504] [2022-07-12 18:34:43,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:43,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:34:43,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:34:43,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:34:43,989 INFO L87 Difference]: Start difference. First operand 563 states and 761 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:44,161 INFO L93 Difference]: Finished difference Result 640 states and 817 transitions. [2022-07-12 18:34:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:34:44,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-07-12 18:34:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:44,164 INFO L225 Difference]: With dead ends: 640 [2022-07-12 18:34:44,164 INFO L226 Difference]: Without dead ends: 640 [2022-07-12 18:34:44,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:34:44,165 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 472 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:44,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 414 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:44,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-07-12 18:34:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 563. [2022-07-12 18:34:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 496 states have (on average 1.4375) internal successors, (713), 531 states have internal predecessors, (713), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 24 states have call predecessors, (32), 16 states have call successors, (32) [2022-07-12 18:34:44,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 761 transitions. [2022-07-12 18:34:44,176 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 761 transitions. Word has length 40 [2022-07-12 18:34:44,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:44,176 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 761 transitions. [2022-07-12 18:34:44,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 761 transitions. [2022-07-12 18:34:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:34:44,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:44,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:44,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-12 18:34:44,178 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:44,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:44,178 INFO L85 PathProgramCache]: Analyzing trace with hash 112861413, now seen corresponding path program 1 times [2022-07-12 18:34:44,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:44,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052999741] [2022-07-12 18:34:44,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:44,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:44,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:44,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:44,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052999741] [2022-07-12 18:34:44,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052999741] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:44,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:44,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-12 18:34:44,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203975861] [2022-07-12 18:34:44,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:44,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:34:44,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:44,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:34:44,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:34:44,439 INFO L87 Difference]: Start difference. First operand 563 states and 761 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:44,982 INFO L93 Difference]: Finished difference Result 912 states and 1170 transitions. [2022-07-12 18:34:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:34:44,983 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-07-12 18:34:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:44,985 INFO L225 Difference]: With dead ends: 912 [2022-07-12 18:34:44,985 INFO L226 Difference]: Without dead ends: 912 [2022-07-12 18:34:44,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:34:44,986 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 953 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:44,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 1029 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:34:44,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-07-12 18:34:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 764. [2022-07-12 18:34:44,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 687 states have (on average 1.4599708879184863) internal successors, (1003), 724 states have internal predecessors, (1003), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 30 states have call predecessors, (44), 22 states have call successors, (44) [2022-07-12 18:34:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1069 transitions. [2022-07-12 18:34:45,000 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1069 transitions. Word has length 40 [2022-07-12 18:34:45,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:45,001 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1069 transitions. [2022-07-12 18:34:45,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:45,001 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1069 transitions. [2022-07-12 18:34:45,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 18:34:45,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:45,002 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:45,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-12 18:34:45,002 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:45,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:45,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1897242428, now seen corresponding path program 1 times [2022-07-12 18:34:45,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:45,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374793402] [2022-07-12 18:34:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:45,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:45,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:45,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:45,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374793402] [2022-07-12 18:34:45,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374793402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:45,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:45,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:34:45,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422799588] [2022-07-12 18:34:45,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:45,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:34:45,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:45,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:34:45,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:34:45,093 INFO L87 Difference]: Start difference. First operand 764 states and 1069 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:45,153 INFO L93 Difference]: Finished difference Result 817 states and 1089 transitions. [2022-07-12 18:34:45,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:34:45,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-07-12 18:34:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:45,156 INFO L225 Difference]: With dead ends: 817 [2022-07-12 18:34:45,156 INFO L226 Difference]: Without dead ends: 817 [2022-07-12 18:34:45,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:34:45,157 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 154 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:45,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 1305 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:34:45,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-07-12 18:34:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 764. [2022-07-12 18:34:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 687 states have (on average 1.4541484716157205) internal successors, (999), 724 states have internal predecessors, (999), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 30 states have call predecessors, (44), 22 states have call successors, (44) [2022-07-12 18:34:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1065 transitions. [2022-07-12 18:34:45,171 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1065 transitions. Word has length 40 [2022-07-12 18:34:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:45,171 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1065 transitions. [2022-07-12 18:34:45,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1065 transitions. [2022-07-12 18:34:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 18:34:45,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:45,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:45,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-12 18:34:45,172 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:45,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:45,173 INFO L85 PathProgramCache]: Analyzing trace with hash -218564434, now seen corresponding path program 1 times [2022-07-12 18:34:45,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:45,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007320272] [2022-07-12 18:34:45,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:45,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:45,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:45,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-12 18:34:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:34:45,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:45,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007320272] [2022-07-12 18:34:45,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007320272] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:45,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:45,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:34:45,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090139718] [2022-07-12 18:34:45,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:45,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:34:45,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:45,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:34:45,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:34:45,244 INFO L87 Difference]: Start difference. First operand 764 states and 1065 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:34:45,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:45,421 INFO L93 Difference]: Finished difference Result 895 states and 1192 transitions. [2022-07-12 18:34:45,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:34:45,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2022-07-12 18:34:45,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:45,425 INFO L225 Difference]: With dead ends: 895 [2022-07-12 18:34:45,425 INFO L226 Difference]: Without dead ends: 895 [2022-07-12 18:34:45,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:34:45,426 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 486 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:45,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 357 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:45,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-07-12 18:34:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 762. [2022-07-12 18:34:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 687 states have (on average 1.4192139737991267) internal successors, (975), 722 states have internal predecessors, (975), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 30 states have call predecessors, (44), 22 states have call successors, (44) [2022-07-12 18:34:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1041 transitions. [2022-07-12 18:34:45,440 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1041 transitions. Word has length 42 [2022-07-12 18:34:45,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:45,440 INFO L495 AbstractCegarLoop]: Abstraction has 762 states and 1041 transitions. [2022-07-12 18:34:45,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:34:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1041 transitions. [2022-07-12 18:34:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 18:34:45,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:45,441 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:45,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-12 18:34:45,441 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:45,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1902204747, now seen corresponding path program 1 times [2022-07-12 18:34:45,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:45,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553747303] [2022-07-12 18:34:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:45,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:45,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:45,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:45,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553747303] [2022-07-12 18:34:45,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553747303] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:45,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:45,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:34:45,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118019778] [2022-07-12 18:34:45,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:45,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:34:45,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:45,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:34:45,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:34:45,539 INFO L87 Difference]: Start difference. First operand 762 states and 1041 transitions. Second operand has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:45,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:45,663 INFO L93 Difference]: Finished difference Result 844 states and 1104 transitions. [2022-07-12 18:34:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:34:45,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-07-12 18:34:45,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:45,667 INFO L225 Difference]: With dead ends: 844 [2022-07-12 18:34:45,667 INFO L226 Difference]: Without dead ends: 844 [2022-07-12 18:34:45,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:34:45,669 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 395 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:45,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 426 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:45,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-07-12 18:34:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 554. [2022-07-12 18:34:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 490 states have (on average 1.4) internal successors, (686), 522 states have internal predecessors, (686), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 24 states have call predecessors, (32), 16 states have call successors, (32) [2022-07-12 18:34:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 734 transitions. [2022-07-12 18:34:45,680 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 734 transitions. Word has length 41 [2022-07-12 18:34:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:45,681 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 734 transitions. [2022-07-12 18:34:45,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 734 transitions. [2022-07-12 18:34:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 18:34:45,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:45,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:45,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-12 18:34:45,682 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:45,683 INFO L85 PathProgramCache]: Analyzing trace with hash -853472827, now seen corresponding path program 1 times [2022-07-12 18:34:45,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:45,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970979217] [2022-07-12 18:34:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:45,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:45,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:45,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 18:34:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:34:45,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:45,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970979217] [2022-07-12 18:34:45,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970979217] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:34:45,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297764056] [2022-07-12 18:34:45,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:45,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:34:45,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:34:45,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:34:45,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 18:34:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:45,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:34:45,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:45,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:34:45,981 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 18:34:45,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-12 18:34:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:34:46,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297764056] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:34:46,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:34:46,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-12 18:34:46,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195257733] [2022-07-12 18:34:46,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:34:46,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:34:46,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:46,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:34:46,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:34:46,006 INFO L87 Difference]: Start difference. First operand 554 states and 734 transitions. Second operand has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:34:46,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:46,535 INFO L93 Difference]: Finished difference Result 1615 states and 2028 transitions. [2022-07-12 18:34:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:34:46,536 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2022-07-12 18:34:46,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:46,540 INFO L225 Difference]: With dead ends: 1615 [2022-07-12 18:34:46,540 INFO L226 Difference]: Without dead ends: 1615 [2022-07-12 18:34:46,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:34:46,541 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 1600 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:46,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1602 Valid, 1088 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:34:46,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2022-07-12 18:34:46,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 675. [2022-07-12 18:34:46,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 603 states have (on average 1.306799336650083) internal successors, (788), 628 states have internal predecessors, (788), 24 states have call successors, (24), 10 states have call predecessors, (24), 20 states have return successors, (48), 36 states have call predecessors, (48), 24 states have call successors, (48) [2022-07-12 18:34:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 860 transitions. [2022-07-12 18:34:46,559 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 860 transitions. Word has length 43 [2022-07-12 18:34:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:46,560 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 860 transitions. [2022-07-12 18:34:46,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:34:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 860 transitions. [2022-07-12 18:34:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 18:34:46,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:46,561 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:46,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:46,775 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,SelfDestructingSolverStorable43 [2022-07-12 18:34:46,775 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:46,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:46,776 INFO L85 PathProgramCache]: Analyzing trace with hash -703021945, now seen corresponding path program 1 times [2022-07-12 18:34:46,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:46,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247096244] [2022-07-12 18:34:46,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:46,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:47,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:47,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:47,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247096244] [2022-07-12 18:34:47,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247096244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:47,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:47,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 18:34:47,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259514480] [2022-07-12 18:34:47,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:47,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:34:47,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:34:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:34:47,407 INFO L87 Difference]: Start difference. First operand 675 states and 860 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:48,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:48,176 INFO L93 Difference]: Finished difference Result 974 states and 1227 transitions. [2022-07-12 18:34:48,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:34:48,177 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-07-12 18:34:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:48,179 INFO L225 Difference]: With dead ends: 974 [2022-07-12 18:34:48,180 INFO L226 Difference]: Without dead ends: 974 [2022-07-12 18:34:48,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:34:48,180 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 407 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:48,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 1442 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:34:48,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-07-12 18:34:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 703. [2022-07-12 18:34:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 631 states have (on average 1.2963549920760697) internal successors, (818), 656 states have internal predecessors, (818), 24 states have call successors, (24), 10 states have call predecessors, (24), 20 states have return successors, (48), 36 states have call predecessors, (48), 24 states have call successors, (48) [2022-07-12 18:34:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 890 transitions. [2022-07-12 18:34:48,195 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 890 transitions. Word has length 43 [2022-07-12 18:34:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:48,196 INFO L495 AbstractCegarLoop]: Abstraction has 703 states and 890 transitions. [2022-07-12 18:34:48,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 890 transitions. [2022-07-12 18:34:48,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:34:48,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:48,197 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:48,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-12 18:34:48,197 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:48,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:48,197 INFO L85 PathProgramCache]: Analyzing trace with hash 494131847, now seen corresponding path program 1 times [2022-07-12 18:34:48,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:48,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668308784] [2022-07-12 18:34:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:48,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:48,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:48,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:48,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668308784] [2022-07-12 18:34:48,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668308784] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:34:48,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226388507] [2022-07-12 18:34:48,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:48,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:34:48,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:34:48,408 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:34:48,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 18:34:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:48,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:34:48,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:48,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:34:48,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 18:34:49,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:34:49,058 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 25 treesize of output 9 [2022-07-12 18:34:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:49,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:34:49,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226388507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:49,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:34:49,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2022-07-12 18:34:49,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032498489] [2022-07-12 18:34:49,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:49,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:34:49,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:49,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:34:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:34:49,066 INFO L87 Difference]: Start difference. First operand 703 states and 890 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:49,526 INFO L93 Difference]: Finished difference Result 1153 states and 1442 transitions. [2022-07-12 18:34:49,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:34:49,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-07-12 18:34:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:49,528 INFO L225 Difference]: With dead ends: 1153 [2022-07-12 18:34:49,528 INFO L226 Difference]: Without dead ends: 1153 [2022-07-12 18:34:49,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:34:49,529 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 532 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:49,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 1111 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 496 Invalid, 0 Unknown, 168 Unchecked, 0.3s Time] [2022-07-12 18:34:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-07-12 18:34:49,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1021. [2022-07-12 18:34:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 931 states have (on average 1.3071965628356605) internal successors, (1217), 951 states have internal predecessors, (1217), 37 states have call successors, (37), 13 states have call predecessors, (37), 26 states have return successors, (74), 56 states have call predecessors, (74), 37 states have call successors, (74) [2022-07-12 18:34:49,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1328 transitions. [2022-07-12 18:34:49,548 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1328 transitions. Word has length 44 [2022-07-12 18:34:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:49,548 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1328 transitions. [2022-07-12 18:34:49,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1328 transitions. [2022-07-12 18:34:49,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:34:49,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:49,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:49,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:49,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:34:49,774 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:49,774 INFO L85 PathProgramCache]: Analyzing trace with hash 494131848, now seen corresponding path program 1 times [2022-07-12 18:34:49,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:49,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102503496] [2022-07-12 18:34:49,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:49,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:50,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:50,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:50,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102503496] [2022-07-12 18:34:50,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102503496] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:34:50,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155981293] [2022-07-12 18:34:50,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:50,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:34:50,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:34:50,053 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:34:50,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 18:34:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:50,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 18:34:50,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:50,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:34:50,548 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 15 treesize of output 11 [2022-07-12 18:34:50,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 18:34:50,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:34:50,761 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 23 treesize of output 7 [2022-07-12 18:34:50,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:34:50,765 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 25 treesize of output 9 [2022-07-12 18:34:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:50,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:34:50,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155981293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:50,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:34:50,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 22 [2022-07-12 18:34:50,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062302352] [2022-07-12 18:34:50,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:50,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:34:50,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:50,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:34:50,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:34:50,816 INFO L87 Difference]: Start difference. First operand 1021 states and 1328 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:51,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:51,247 INFO L93 Difference]: Finished difference Result 1109 states and 1392 transitions. [2022-07-12 18:34:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:34:51,248 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-07-12 18:34:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:51,250 INFO L225 Difference]: With dead ends: 1109 [2022-07-12 18:34:51,250 INFO L226 Difference]: Without dead ends: 1109 [2022-07-12 18:34:51,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:34:51,251 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 604 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:51,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 1096 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 409 Invalid, 0 Unknown, 147 Unchecked, 0.3s Time] [2022-07-12 18:34:51,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-07-12 18:34:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1023. [2022-07-12 18:34:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 933 states have (on average 1.3054662379421222) internal successors, (1218), 953 states have internal predecessors, (1218), 37 states have call successors, (37), 13 states have call predecessors, (37), 26 states have return successors, (74), 56 states have call predecessors, (74), 37 states have call successors, (74) [2022-07-12 18:34:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1329 transitions. [2022-07-12 18:34:51,267 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1329 transitions. Word has length 44 [2022-07-12 18:34:51,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:51,267 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1329 transitions. [2022-07-12 18:34:51,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:51,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1329 transitions. [2022-07-12 18:34:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:34:51,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:51,268 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:51,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:51,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:34:51,483 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:51,484 INFO L85 PathProgramCache]: Analyzing trace with hash 492284805, now seen corresponding path program 1 times [2022-07-12 18:34:51,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:51,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236535938] [2022-07-12 18:34:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:51,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:51,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:51,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:51,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236535938] [2022-07-12 18:34:51,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236535938] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:34:51,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806403248] [2022-07-12 18:34:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:51,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:34:51,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:34:51,964 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:34:51,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 18:34:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:52,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 18:34:52,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:52,209 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:34:52,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 18:34:52,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:34:52,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-12 18:34:52,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:34:52,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-12 18:34:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:52,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:34:52,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806403248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:52,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:34:52,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15] total 27 [2022-07-12 18:34:52,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427025422] [2022-07-12 18:34:52,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:52,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:34:52,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:52,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:34:52,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:34:52,803 INFO L87 Difference]: Start difference. First operand 1023 states and 1329 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:53,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:53,159 INFO L93 Difference]: Finished difference Result 1682 states and 2186 transitions. [2022-07-12 18:34:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 18:34:53,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-07-12 18:34:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:53,163 INFO L225 Difference]: With dead ends: 1682 [2022-07-12 18:34:53,163 INFO L226 Difference]: Without dead ends: 1682 [2022-07-12 18:34:53,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 18:34:53,164 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 203 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:53,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1202 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 324 Invalid, 0 Unknown, 144 Unchecked, 0.2s Time] [2022-07-12 18:34:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-07-12 18:34:53,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1498. [2022-07-12 18:34:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1362 states have (on average 1.3186490455212923) internal successors, (1796), 1399 states have internal predecessors, (1796), 65 states have call successors, (65), 22 states have call predecessors, (65), 44 states have return successors, (130), 76 states have call predecessors, (130), 65 states have call successors, (130) [2022-07-12 18:34:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 1991 transitions. [2022-07-12 18:34:53,189 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 1991 transitions. Word has length 44 [2022-07-12 18:34:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:53,189 INFO L495 AbstractCegarLoop]: Abstraction has 1498 states and 1991 transitions. [2022-07-12 18:34:53,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:53,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 1991 transitions. [2022-07-12 18:34:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:34:53,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:53,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:53,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:53,403 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,SelfDestructingSolverStorable47 [2022-07-12 18:34:53,404 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:53,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:53,404 INFO L85 PathProgramCache]: Analyzing trace with hash 492284806, now seen corresponding path program 1 times [2022-07-12 18:34:53,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:53,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092388157] [2022-07-12 18:34:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:53,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:53,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:53,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:53,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092388157] [2022-07-12 18:34:53,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092388157] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:34:53,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515174474] [2022-07-12 18:34:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:53,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:34:53,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:34:53,884 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:34:53,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 18:34:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:53,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-12 18:34:53,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:54,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:34:54,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 18:34:54,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 18:34:54,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:34:54,472 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 27 treesize of output 26 [2022-07-12 18:34:54,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:34:54,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-12 18:34:54,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-12 18:34:54,609 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 19 treesize of output 7 [2022-07-12 18:34:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:54,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:34:54,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515174474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:54,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:34:54,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 27 [2022-07-12 18:34:54,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632833204] [2022-07-12 18:34:54,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:54,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:34:54,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:54,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:34:54,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:34:54,671 INFO L87 Difference]: Start difference. First operand 1498 states and 1991 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:55,454 INFO L93 Difference]: Finished difference Result 2561 states and 3387 transitions. [2022-07-12 18:34:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:34:55,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-07-12 18:34:55,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:55,460 INFO L225 Difference]: With dead ends: 2561 [2022-07-12 18:34:55,460 INFO L226 Difference]: Without dead ends: 2561 [2022-07-12 18:34:55,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=375, Invalid=1347, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 18:34:55,461 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 1313 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:55,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1315 Valid, 1183 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:34:55,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2022-07-12 18:34:55,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2069. [2022-07-12 18:34:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 1890 states have (on average 1.338095238095238) internal successors, (2529), 1938 states have internal predecessors, (2529), 92 states have call successors, (92), 30 states have call predecessors, (92), 60 states have return successors, (184), 100 states have call predecessors, (184), 92 states have call successors, (184) [2022-07-12 18:34:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 2805 transitions. [2022-07-12 18:34:55,497 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 2805 transitions. Word has length 44 [2022-07-12 18:34:55,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:55,497 INFO L495 AbstractCegarLoop]: Abstraction has 2069 states and 2805 transitions. [2022-07-12 18:34:55,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:55,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 2805 transitions. [2022-07-12 18:34:55,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:34:55,498 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:55,499 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:55,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:55,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-12 18:34:55,720 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:55,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:55,720 INFO L85 PathProgramCache]: Analyzing trace with hash -781098313, now seen corresponding path program 1 times [2022-07-12 18:34:55,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:55,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701228804] [2022-07-12 18:34:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:55,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:56,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:56,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:56,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701228804] [2022-07-12 18:34:56,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701228804] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:56,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:56,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 18:34:56,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311174898] [2022-07-12 18:34:56,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:56,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:34:56,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:56,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:34:56,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:34:56,035 INFO L87 Difference]: Start difference. First operand 2069 states and 2805 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:57,014 INFO L93 Difference]: Finished difference Result 2550 states and 3399 transitions. [2022-07-12 18:34:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 18:34:57,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-07-12 18:34:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:57,019 INFO L225 Difference]: With dead ends: 2550 [2022-07-12 18:34:57,019 INFO L226 Difference]: Without dead ends: 2550 [2022-07-12 18:34:57,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 18:34:57,020 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 848 mSDsluCounter, 1640 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:57,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 1848 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 18:34:57,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2022-07-12 18:34:57,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2099. [2022-07-12 18:34:57,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 1912 states have (on average 1.3378661087866108) internal successors, (2558), 1964 states have internal predecessors, (2558), 92 states have call successors, (92), 34 states have call predecessors, (92), 68 states have return successors, (184), 100 states have call predecessors, (184), 92 states have call successors, (184) [2022-07-12 18:34:57,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 2834 transitions. [2022-07-12 18:34:57,058 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 2834 transitions. Word has length 44 [2022-07-12 18:34:57,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:57,059 INFO L495 AbstractCegarLoop]: Abstraction has 2099 states and 2834 transitions. [2022-07-12 18:34:57,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:57,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 2834 transitions. [2022-07-12 18:34:57,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 18:34:57,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:57,060 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:57,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-12 18:34:57,061 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:57,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:57,061 INFO L85 PathProgramCache]: Analyzing trace with hash -781098312, now seen corresponding path program 1 times [2022-07-12 18:34:57,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:57,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623223386] [2022-07-12 18:34:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:57,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:57,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:57,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:57,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623223386] [2022-07-12 18:34:57,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623223386] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:34:57,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073001707] [2022-07-12 18:34:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:57,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:34:57,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:34:57,696 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:34:57,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 18:34:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:57,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 18:34:57,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:57,990 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:34:57,991 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 11 treesize of output 11 [2022-07-12 18:34:58,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:34:58,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:34:58,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:34:58,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:34:58,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:34:58,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 18:34:58,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:34:58,224 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 23 treesize of output 22 [2022-07-12 18:34:58,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:34:58,230 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 23 treesize of output 22 [2022-07-12 18:34:58,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:34:58,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-12 18:34:58,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:34:58,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-12 18:34:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:58,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:34:58,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073001707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:58,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:34:58,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [17] total 25 [2022-07-12 18:34:58,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052224270] [2022-07-12 18:34:58,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:58,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:34:58,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:58,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:34:58,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:34:58,290 INFO L87 Difference]: Start difference. First operand 2099 states and 2834 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:58,577 INFO L93 Difference]: Finished difference Result 2112 states and 2847 transitions. [2022-07-12 18:34:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:34:58,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-07-12 18:34:58,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:58,582 INFO L225 Difference]: With dead ends: 2112 [2022-07-12 18:34:58,582 INFO L226 Difference]: Without dead ends: 2112 [2022-07-12 18:34:58,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:34:58,582 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 79 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:58,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 599 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:58,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2022-07-12 18:34:58,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 2104. [2022-07-12 18:34:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1917 states have (on average 1.3369848721961397) internal successors, (2563), 1969 states have internal predecessors, (2563), 92 states have call successors, (92), 34 states have call predecessors, (92), 68 states have return successors, (184), 100 states have call predecessors, (184), 92 states have call successors, (184) [2022-07-12 18:34:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 2839 transitions. [2022-07-12 18:34:58,613 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 2839 transitions. Word has length 44 [2022-07-12 18:34:58,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:58,613 INFO L495 AbstractCegarLoop]: Abstraction has 2104 states and 2839 transitions. [2022-07-12 18:34:58,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:58,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 2839 transitions. [2022-07-12 18:34:58,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 18:34:58,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:58,615 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:58,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:58,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:34:58,836 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:58,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:58,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1503059700, now seen corresponding path program 1 times [2022-07-12 18:34:58,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:58,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213130061] [2022-07-12 18:34:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:58,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:58,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-12 18:34:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:58,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:58,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213130061] [2022-07-12 18:34:58,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213130061] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:34:58,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550466383] [2022-07-12 18:34:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:58,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:34:58,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:34:58,900 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:34:58,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 18:34:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:59,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 18:34:59,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:34:59,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:34:59,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-12 18:34:59,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:34:59,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-12 18:34:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:34:59,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:34:59,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550466383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:59,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:34:59,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-07-12 18:34:59,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787503061] [2022-07-12 18:34:59,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:59,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:34:59,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:59,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:34:59,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:34:59,139 INFO L87 Difference]: Start difference. First operand 2104 states and 2839 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:34:59,404 INFO L93 Difference]: Finished difference Result 1917 states and 2587 transitions. [2022-07-12 18:34:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:34:59,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-07-12 18:34:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:34:59,408 INFO L225 Difference]: With dead ends: 1917 [2022-07-12 18:34:59,408 INFO L226 Difference]: Without dead ends: 1917 [2022-07-12 18:34:59,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:34:59,409 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 200 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:34:59,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1080 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:34:59,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2022-07-12 18:34:59,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1698. [2022-07-12 18:34:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1545 states have (on average 1.345631067961165) internal successors, (2079), 1588 states have internal predecessors, (2079), 74 states have call successors, (74), 26 states have call predecessors, (74), 52 states have return successors, (148), 83 states have call predecessors, (148), 74 states have call successors, (148) [2022-07-12 18:34:59,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2301 transitions. [2022-07-12 18:34:59,437 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2301 transitions. Word has length 45 [2022-07-12 18:34:59,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:34:59,438 INFO L495 AbstractCegarLoop]: Abstraction has 1698 states and 2301 transitions. [2022-07-12 18:34:59,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:34:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2301 transitions. [2022-07-12 18:34:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 18:34:59,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:34:59,439 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:34:59,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:34:59,663 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,SelfDestructingSolverStorable51 [2022-07-12 18:34:59,664 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:34:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:34:59,664 INFO L85 PathProgramCache]: Analyzing trace with hash 102761101, now seen corresponding path program 1 times [2022-07-12 18:34:59,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:34:59,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130781561] [2022-07-12 18:34:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:34:59,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:34:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:59,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:34:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:34:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:34:59,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:34:59,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130781561] [2022-07-12 18:34:59,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130781561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:34:59,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:34:59,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-12 18:34:59,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220324079] [2022-07-12 18:34:59,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:34:59,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:34:59,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:34:59,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:34:59,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:34:59,804 INFO L87 Difference]: Start difference. First operand 1698 states and 2301 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:00,025 INFO L93 Difference]: Finished difference Result 2018 states and 2692 transitions. [2022-07-12 18:35:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:35:00,026 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-07-12 18:35:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:00,029 INFO L225 Difference]: With dead ends: 2018 [2022-07-12 18:35:00,030 INFO L226 Difference]: Without dead ends: 2018 [2022-07-12 18:35:00,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:35:00,030 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 1106 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:00,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1108 Valid, 959 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:35:00,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2022-07-12 18:35:00,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1689. [2022-07-12 18:35:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1536 states have (on average 1.3404947916666667) internal successors, (2059), 1579 states have internal predecessors, (2059), 74 states have call successors, (74), 26 states have call predecessors, (74), 52 states have return successors, (148), 83 states have call predecessors, (148), 74 states have call successors, (148) [2022-07-12 18:35:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2281 transitions. [2022-07-12 18:35:00,058 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2281 transitions. Word has length 45 [2022-07-12 18:35:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:00,058 INFO L495 AbstractCegarLoop]: Abstraction has 1689 states and 2281 transitions. [2022-07-12 18:35:00,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2281 transitions. [2022-07-12 18:35:00,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 18:35:00,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:00,059 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:00,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-12 18:35:00,059 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:00,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:00,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1861783222, now seen corresponding path program 1 times [2022-07-12 18:35:00,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:00,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224738800] [2022-07-12 18:35:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:00,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:00,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:00,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:00,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224738800] [2022-07-12 18:35:00,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224738800] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:35:00,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663358700] [2022-07-12 18:35:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:00,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:35:00,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:35:00,253 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:35:00,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 18:35:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:00,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 18:35:00,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:35:00,643 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 15 treesize of output 11 [2022-07-12 18:35:00,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:35:00,800 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 24 treesize of output 8 [2022-07-12 18:35:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:00,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:35:00,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663358700] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:35:00,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:35:00,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 21 [2022-07-12 18:35:00,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372428270] [2022-07-12 18:35:00,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:35:00,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:35:00,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:35:00,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:35:00,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:35:00,808 INFO L87 Difference]: Start difference. First operand 1689 states and 2281 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:01,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:01,059 INFO L93 Difference]: Finished difference Result 1769 states and 2361 transitions. [2022-07-12 18:35:01,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:35:01,060 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-07-12 18:35:01,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:01,063 INFO L225 Difference]: With dead ends: 1769 [2022-07-12 18:35:01,063 INFO L226 Difference]: Without dead ends: 1769 [2022-07-12 18:35:01,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:35:01,064 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 556 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:01,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 884 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 196 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-07-12 18:35:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2022-07-12 18:35:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1692. [2022-07-12 18:35:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1539 states have (on average 1.3398310591293048) internal successors, (2062), 1582 states have internal predecessors, (2062), 74 states have call successors, (74), 26 states have call predecessors, (74), 52 states have return successors, (148), 83 states have call predecessors, (148), 74 states have call successors, (148) [2022-07-12 18:35:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2284 transitions. [2022-07-12 18:35:01,091 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2284 transitions. Word has length 45 [2022-07-12 18:35:01,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:01,091 INFO L495 AbstractCegarLoop]: Abstraction has 1692 states and 2284 transitions. [2022-07-12 18:35:01,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2284 transitions. [2022-07-12 18:35:01,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 18:35:01,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:01,092 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:01,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:35:01,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:35:01,316 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:01,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:01,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1919041524, now seen corresponding path program 1 times [2022-07-12 18:35:01,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:01,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279091900] [2022-07-12 18:35:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:01,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:01,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:01,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:01,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279091900] [2022-07-12 18:35:01,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279091900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:35:01,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:35:01,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-12 18:35:01,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555534835] [2022-07-12 18:35:01,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:35:01,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 18:35:01,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:35:01,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 18:35:01,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:35:01,815 INFO L87 Difference]: Start difference. First operand 1692 states and 2284 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:02,535 INFO L93 Difference]: Finished difference Result 2158 states and 2836 transitions. [2022-07-12 18:35:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:35:02,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-07-12 18:35:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:02,540 INFO L225 Difference]: With dead ends: 2158 [2022-07-12 18:35:02,540 INFO L226 Difference]: Without dead ends: 2158 [2022-07-12 18:35:02,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=664, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:35:02,541 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 1704 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1706 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:02,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1706 Valid, 1285 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:35:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2022-07-12 18:35:02,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1689. [2022-07-12 18:35:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1536 states have (on average 1.3391927083333333) internal successors, (2057), 1579 states have internal predecessors, (2057), 74 states have call successors, (74), 26 states have call predecessors, (74), 52 states have return successors, (148), 83 states have call predecessors, (148), 74 states have call successors, (148) [2022-07-12 18:35:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2279 transitions. [2022-07-12 18:35:02,570 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2279 transitions. Word has length 45 [2022-07-12 18:35:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:02,570 INFO L495 AbstractCegarLoop]: Abstraction has 1689 states and 2279 transitions. [2022-07-12 18:35:02,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2279 transitions. [2022-07-12 18:35:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 18:35:02,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:02,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:02,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-12 18:35:02,572 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:02,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:02,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1990296656, now seen corresponding path program 1 times [2022-07-12 18:35:02,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:02,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193351375] [2022-07-12 18:35:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:02,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:03,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:03,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:03,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193351375] [2022-07-12 18:35:03,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193351375] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:35:03,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:35:03,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 18:35:03,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682243948] [2022-07-12 18:35:03,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:35:03,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:35:03,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:35:03,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:35:03,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:35:03,171 INFO L87 Difference]: Start difference. First operand 1689 states and 2279 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:04,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:04,093 INFO L93 Difference]: Finished difference Result 2322 states and 3082 transitions. [2022-07-12 18:35:04,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:35:04,093 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-07-12 18:35:04,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:04,098 INFO L225 Difference]: With dead ends: 2322 [2022-07-12 18:35:04,098 INFO L226 Difference]: Without dead ends: 2322 [2022-07-12 18:35:04,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2022-07-12 18:35:04,099 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 1172 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:04,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 1517 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:35:04,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-07-12 18:35:04,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 1872. [2022-07-12 18:35:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1703 states have (on average 1.352319436288902) internal successors, (2303), 1750 states have internal predecessors, (2303), 82 states have call successors, (82), 30 states have call predecessors, (82), 60 states have return successors, (164), 91 states have call predecessors, (164), 82 states have call successors, (164) [2022-07-12 18:35:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2549 transitions. [2022-07-12 18:35:04,139 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2549 transitions. Word has length 45 [2022-07-12 18:35:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:04,139 INFO L495 AbstractCegarLoop]: Abstraction has 1872 states and 2549 transitions. [2022-07-12 18:35:04,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:04,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2549 transitions. [2022-07-12 18:35:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 18:35:04,140 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:04,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:04,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-12 18:35:04,140 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:04,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:04,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1988449613, now seen corresponding path program 1 times [2022-07-12 18:35:04,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:04,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771609725] [2022-07-12 18:35:04,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:04,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:04,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:04,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:04,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771609725] [2022-07-12 18:35:04,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771609725] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:35:04,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:35:04,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 18:35:04,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945200695] [2022-07-12 18:35:04,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:35:04,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:35:04,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:35:04,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:35:04,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:35:04,409 INFO L87 Difference]: Start difference. First operand 1872 states and 2549 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:05,238 INFO L93 Difference]: Finished difference Result 2513 states and 3398 transitions. [2022-07-12 18:35:05,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:35:05,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-07-12 18:35:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:05,244 INFO L225 Difference]: With dead ends: 2513 [2022-07-12 18:35:05,244 INFO L226 Difference]: Without dead ends: 2513 [2022-07-12 18:35:05,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:35:05,245 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 688 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:05,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 1147 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:35:05,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2022-07-12 18:35:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 2126. [2022-07-12 18:35:05,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 1930 states have (on average 1.3476683937823835) internal successors, (2601), 1986 states have internal predecessors, (2601), 97 states have call successors, (97), 36 states have call predecessors, (97), 72 states have return successors, (194), 103 states have call predecessors, (194), 97 states have call successors, (194) [2022-07-12 18:35:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 2892 transitions. [2022-07-12 18:35:05,312 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 2892 transitions. Word has length 45 [2022-07-12 18:35:05,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:05,312 INFO L495 AbstractCegarLoop]: Abstraction has 2126 states and 2892 transitions. [2022-07-12 18:35:05,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:05,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 2892 transitions. [2022-07-12 18:35:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 18:35:05,313 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:05,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:05,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-12 18:35:05,313 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:05,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:05,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1988449614, now seen corresponding path program 1 times [2022-07-12 18:35:05,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:05,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239606956] [2022-07-12 18:35:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:05,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:05,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:05,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:05,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239606956] [2022-07-12 18:35:05,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239606956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:35:05,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:35:05,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-12 18:35:05,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410807074] [2022-07-12 18:35:05,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:35:05,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:35:05,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:35:05,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:35:05,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:35:05,630 INFO L87 Difference]: Start difference. First operand 2126 states and 2892 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:06,306 INFO L93 Difference]: Finished difference Result 2520 states and 3374 transitions. [2022-07-12 18:35:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:35:06,306 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-07-12 18:35:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:06,312 INFO L225 Difference]: With dead ends: 2520 [2022-07-12 18:35:06,312 INFO L226 Difference]: Without dead ends: 2520 [2022-07-12 18:35:06,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2022-07-12 18:35:06,313 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 617 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:06,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 879 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:35:06,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2022-07-12 18:35:06,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2302. [2022-07-12 18:35:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2090 states have (on average 1.3574162679425836) internal successors, (2837), 2150 states have internal predecessors, (2837), 105 states have call successors, (105), 40 states have call predecessors, (105), 80 states have return successors, (210), 111 states have call predecessors, (210), 105 states have call successors, (210) [2022-07-12 18:35:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 3152 transitions. [2022-07-12 18:35:06,352 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 3152 transitions. Word has length 45 [2022-07-12 18:35:06,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:06,352 INFO L495 AbstractCegarLoop]: Abstraction has 2302 states and 3152 transitions. [2022-07-12 18:35:06,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 3152 transitions. [2022-07-12 18:35:06,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 18:35:06,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:06,353 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:06,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-12 18:35:06,354 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:06,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:06,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1569652866, now seen corresponding path program 1 times [2022-07-12 18:35:06,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:06,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479433862] [2022-07-12 18:35:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:06,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:06,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:06,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:06,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479433862] [2022-07-12 18:35:06,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479433862] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:35:06,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:35:06,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 18:35:06,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954004800] [2022-07-12 18:35:06,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:35:06,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:35:06,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:35:06,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:35:06,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:35:06,593 INFO L87 Difference]: Start difference. First operand 2302 states and 3152 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:07,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:07,454 INFO L93 Difference]: Finished difference Result 3602 states and 4786 transitions. [2022-07-12 18:35:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 18:35:07,455 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-07-12 18:35:07,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:07,463 INFO L225 Difference]: With dead ends: 3602 [2022-07-12 18:35:07,463 INFO L226 Difference]: Without dead ends: 3602 [2022-07-12 18:35:07,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:35:07,464 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 868 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:07,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [872 Valid, 1864 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:35:07,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3602 states. [2022-07-12 18:35:07,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3602 to 2961. [2022-07-12 18:35:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2658 states have (on average 1.3600451467268624) internal successors, (3615), 2754 states have internal predecessors, (3615), 146 states have call successors, (146), 65 states have call predecessors, (146), 130 states have return successors, (292), 141 states have call predecessors, (292), 146 states have call successors, (292) [2022-07-12 18:35:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 4053 transitions. [2022-07-12 18:35:07,534 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 4053 transitions. Word has length 46 [2022-07-12 18:35:07,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:07,535 INFO L495 AbstractCegarLoop]: Abstraction has 2961 states and 4053 transitions. [2022-07-12 18:35:07,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:07,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 4053 transitions. [2022-07-12 18:35:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 18:35:07,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:07,536 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:07,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-12 18:35:07,536 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:07,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:07,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1512394564, now seen corresponding path program 1 times [2022-07-12 18:35:07,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:07,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351038012] [2022-07-12 18:35:07,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:07,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:07,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:07,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:07,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351038012] [2022-07-12 18:35:07,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351038012] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:35:07,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:35:07,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-12 18:35:07,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170964601] [2022-07-12 18:35:07,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:35:07,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:35:07,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:35:07,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:35:07,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:35:07,815 INFO L87 Difference]: Start difference. First operand 2961 states and 4053 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:08,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:08,459 INFO L93 Difference]: Finished difference Result 3180 states and 4276 transitions. [2022-07-12 18:35:08,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:35:08,460 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-07-12 18:35:08,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:08,467 INFO L225 Difference]: With dead ends: 3180 [2022-07-12 18:35:08,467 INFO L226 Difference]: Without dead ends: 3180 [2022-07-12 18:35:08,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:35:08,468 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 667 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:08,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1054 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:35:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2022-07-12 18:35:08,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 2959. [2022-07-12 18:35:08,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2656 states have (on average 1.3599397590361446) internal successors, (3612), 2752 states have internal predecessors, (3612), 146 states have call successors, (146), 65 states have call predecessors, (146), 130 states have return successors, (292), 141 states have call predecessors, (292), 146 states have call successors, (292) [2022-07-12 18:35:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 4050 transitions. [2022-07-12 18:35:08,517 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 4050 transitions. Word has length 46 [2022-07-12 18:35:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:08,517 INFO L495 AbstractCegarLoop]: Abstraction has 2959 states and 4050 transitions. [2022-07-12 18:35:08,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 4050 transitions. [2022-07-12 18:35:08,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 18:35:08,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:08,519 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:08,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-07-12 18:35:08,520 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:08,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:08,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1829142158, now seen corresponding path program 1 times [2022-07-12 18:35:08,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:08,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494281701] [2022-07-12 18:35:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:08,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:08,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:08,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:08,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494281701] [2022-07-12 18:35:08,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494281701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:35:08,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300937008] [2022-07-12 18:35:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:08,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:35:08,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:35:08,763 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:35:08,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 18:35:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:08,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 18:35:08,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:35:09,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 18:35:09,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:35:09,361 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 23 treesize of output 7 [2022-07-12 18:35:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:09,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:35:09,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300937008] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:35:09,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:35:09,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2022-07-12 18:35:09,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491989953] [2022-07-12 18:35:09,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:35:09,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:35:09,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:35:09,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:35:09,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:35:09,380 INFO L87 Difference]: Start difference. First operand 2959 states and 4050 transitions. Second operand has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:09,669 INFO L93 Difference]: Finished difference Result 3045 states and 4130 transitions. [2022-07-12 18:35:09,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:35:09,669 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-07-12 18:35:09,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:09,674 INFO L225 Difference]: With dead ends: 3045 [2022-07-12 18:35:09,675 INFO L226 Difference]: Without dead ends: 3045 [2022-07-12 18:35:09,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:35:09,675 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 455 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:09,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 1064 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 277 Invalid, 0 Unknown, 136 Unchecked, 0.1s Time] [2022-07-12 18:35:09,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2022-07-12 18:35:09,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2970. [2022-07-12 18:35:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2667 states have (on average 1.3592050993625797) internal successors, (3625), 2763 states have internal predecessors, (3625), 146 states have call successors, (146), 65 states have call predecessors, (146), 130 states have return successors, (292), 141 states have call predecessors, (292), 146 states have call successors, (292) [2022-07-12 18:35:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 4063 transitions. [2022-07-12 18:35:09,722 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 4063 transitions. Word has length 47 [2022-07-12 18:35:09,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:09,722 INFO L495 AbstractCegarLoop]: Abstraction has 2970 states and 4063 transitions. [2022-07-12 18:35:09,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:09,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 4063 transitions. [2022-07-12 18:35:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 18:35:09,723 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:09,723 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:09,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:35:09,943 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,SelfDestructingSolverStorable60 [2022-07-12 18:35:09,943 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:09,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:09,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1656478512, now seen corresponding path program 1 times [2022-07-12 18:35:09,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:09,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013771009] [2022-07-12 18:35:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:09,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:10,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:10,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:10,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013771009] [2022-07-12 18:35:10,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013771009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:35:10,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678197970] [2022-07-12 18:35:10,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:10,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:35:10,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:35:10,340 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:35:10,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 18:35:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:10,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 18:35:10,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:35:10,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 18:35:10,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:10,850 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 27 treesize of output 26 [2022-07-12 18:35:10,944 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 19 treesize of output 7 [2022-07-12 18:35:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:10,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:35:10,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678197970] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:35:10,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:35:10,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 25 [2022-07-12 18:35:10,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456563051] [2022-07-12 18:35:10,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:35:10,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:35:10,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:35:10,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:35:10,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:35:10,963 INFO L87 Difference]: Start difference. First operand 2970 states and 4063 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:11,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:11,697 INFO L93 Difference]: Finished difference Result 3453 states and 4638 transitions. [2022-07-12 18:35:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 18:35:11,697 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-07-12 18:35:11,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:11,703 INFO L225 Difference]: With dead ends: 3453 [2022-07-12 18:35:11,703 INFO L226 Difference]: Without dead ends: 3453 [2022-07-12 18:35:11,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=429, Invalid=1551, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 18:35:11,704 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 1300 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:11,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1304 Valid, 1179 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:35:11,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3453 states. [2022-07-12 18:35:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3453 to 2977. [2022-07-12 18:35:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2674 states have (on average 1.3593866866118176) internal successors, (3635), 2770 states have internal predecessors, (3635), 146 states have call successors, (146), 65 states have call predecessors, (146), 130 states have return successors, (292), 141 states have call predecessors, (292), 146 states have call successors, (292) [2022-07-12 18:35:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 4073 transitions. [2022-07-12 18:35:11,764 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 4073 transitions. Word has length 47 [2022-07-12 18:35:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:11,764 INFO L495 AbstractCegarLoop]: Abstraction has 2977 states and 4073 transitions. [2022-07-12 18:35:11,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:11,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 4073 transitions. [2022-07-12 18:35:11,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 18:35:11,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:11,768 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:11,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:35:11,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:35:11,994 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:11,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1323444049, now seen corresponding path program 1 times [2022-07-12 18:35:11,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:11,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809742345] [2022-07-12 18:35:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:11,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:12,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:12,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 18:35:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:35:12,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:12,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809742345] [2022-07-12 18:35:12,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809742345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:35:12,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:35:12,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:35:12,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295265950] [2022-07-12 18:35:12,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:35:12,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:35:12,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:35:12,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:35:12,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:35:12,055 INFO L87 Difference]: Start difference. First operand 2977 states and 4073 transitions. Second operand has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:35:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:12,086 INFO L93 Difference]: Finished difference Result 3229 states and 4383 transitions. [2022-07-12 18:35:12,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:35:12,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-07-12 18:35:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:12,093 INFO L225 Difference]: With dead ends: 3229 [2022-07-12 18:35:12,093 INFO L226 Difference]: Without dead ends: 3229 [2022-07-12 18:35:12,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:35:12,094 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 327 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:12,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 248 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:35:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2022-07-12 18:35:12,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2976. [2022-07-12 18:35:12,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 2674 states have (on average 1.349663425579656) internal successors, (3609), 2769 states have internal predecessors, (3609), 146 states have call successors, (146), 65 states have call predecessors, (146), 130 states have return successors, (292), 141 states have call predecessors, (292), 146 states have call successors, (292) [2022-07-12 18:35:12,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 4047 transitions. [2022-07-12 18:35:12,141 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 4047 transitions. Word has length 48 [2022-07-12 18:35:12,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:12,141 INFO L495 AbstractCegarLoop]: Abstraction has 2976 states and 4047 transitions. [2022-07-12 18:35:12,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:35:12,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 4047 transitions. [2022-07-12 18:35:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 18:35:12,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:12,143 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:12,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-07-12 18:35:12,143 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:12,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1922907279, now seen corresponding path program 1 times [2022-07-12 18:35:12,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:12,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022875401] [2022-07-12 18:35:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:12,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:13,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:13,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 18:35:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:35:13,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:13,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022875401] [2022-07-12 18:35:13,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022875401] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:35:13,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386909261] [2022-07-12 18:35:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:13,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:35:13,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:35:13,044 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:35:13,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 18:35:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:13,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-12 18:35:13,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:35:13,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 18:35:13,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 18:35:13,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:13,621 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 23 treesize of output 22 [2022-07-12 18:35:13,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:13,628 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 30 treesize of output 23 [2022-07-12 18:35:13,741 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:13,741 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 [2022-07-12 18:35:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:13,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:13,910 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:13,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2022-07-12 18:35:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:14,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:35:14,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:35:14,599 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:14,600 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 142 treesize of output 146 [2022-07-12 18:35:14,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:35:14,612 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:14,613 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 235 treesize of output 237 [2022-07-12 18:35:14,632 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 38 treesize of output 32 [2022-07-12 18:35:14,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:14,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:35:14,668 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:14,668 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 304 treesize of output 312 [2022-07-12 18:35:14,678 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:14,679 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 306 treesize of output 310 [2022-07-12 18:35:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:35:15,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386909261] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:35:15,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:35:15,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 21] total 56 [2022-07-12 18:35:15,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235759380] [2022-07-12 18:35:15,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:35:15,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-12 18:35:15,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:35:15,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-12 18:35:15,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2877, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 18:35:15,498 INFO L87 Difference]: Start difference. First operand 2976 states and 4047 transitions. Second operand has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 54 states have internal predecessors, (125), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:35:24,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:24,076 INFO L93 Difference]: Finished difference Result 6031 states and 8156 transitions. [2022-07-12 18:35:24,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-12 18:35:24,077 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 54 states have internal predecessors, (125), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2022-07-12 18:35:24,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:24,090 INFO L225 Difference]: With dead ends: 6031 [2022-07-12 18:35:24,090 INFO L226 Difference]: Without dead ends: 6027 [2022-07-12 18:35:24,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 69 SyntacticMatches, 14 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5544 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3223, Invalid=14867, Unknown=0, NotChecked=0, Total=18090 [2022-07-12 18:35:24,093 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 6965 mSDsluCounter, 7386 mSDsCounter, 0 mSdLazyCounter, 3831 mSolverCounterSat, 916 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6967 SdHoareTripleChecker+Valid, 7575 SdHoareTripleChecker+Invalid, 5106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 916 IncrementalHoareTripleChecker+Valid, 3831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:24,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6967 Valid, 7575 Invalid, 5106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [916 Valid, 3831 Invalid, 0 Unknown, 359 Unchecked, 2.1s Time] [2022-07-12 18:35:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6027 states. [2022-07-12 18:35:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6027 to 2900. [2022-07-12 18:35:24,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2606 states have (on average 1.3434382194934766) internal successors, (3501), 2698 states have internal predecessors, (3501), 140 states have call successors, (140), 64 states have call predecessors, (140), 128 states have return successors, (280), 137 states have call predecessors, (280), 140 states have call successors, (280) [2022-07-12 18:35:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 3921 transitions. [2022-07-12 18:35:24,183 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 3921 transitions. Word has length 49 [2022-07-12 18:35:24,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:24,183 INFO L495 AbstractCegarLoop]: Abstraction has 2900 states and 3921 transitions. [2022-07-12 18:35:24,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 54 states have internal predecessors, (125), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:35:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 3921 transitions. [2022-07-12 18:35:24,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 18:35:24,184 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:24,185 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:24,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:35:24,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:35:24,400 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash 904339398, now seen corresponding path program 1 times [2022-07-12 18:35:24,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:24,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045484639] [2022-07-12 18:35:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:24,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:24,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:24,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:24,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045484639] [2022-07-12 18:35:24,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045484639] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:35:24,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:35:24,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-12 18:35:24,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395905543] [2022-07-12 18:35:24,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:35:24,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:35:24,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:35:24,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:35:24,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:35:24,963 INFO L87 Difference]: Start difference. First operand 2900 states and 3921 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:26,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:26,063 INFO L93 Difference]: Finished difference Result 3354 states and 4457 transitions. [2022-07-12 18:35:26,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 18:35:26,064 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-07-12 18:35:26,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:26,072 INFO L225 Difference]: With dead ends: 3354 [2022-07-12 18:35:26,072 INFO L226 Difference]: Without dead ends: 3354 [2022-07-12 18:35:26,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 18:35:26,073 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 1189 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:26,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 1661 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:35:26,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2022-07-12 18:35:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 2896. [2022-07-12 18:35:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2602 states have (on average 1.343197540353574) internal successors, (3495), 2694 states have internal predecessors, (3495), 140 states have call successors, (140), 64 states have call predecessors, (140), 128 states have return successors, (280), 137 states have call predecessors, (280), 140 states have call successors, (280) [2022-07-12 18:35:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 3915 transitions. [2022-07-12 18:35:26,121 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 3915 transitions. Word has length 48 [2022-07-12 18:35:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:26,122 INFO L495 AbstractCegarLoop]: Abstraction has 2896 states and 3915 transitions. [2022-07-12 18:35:26,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:26,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 3915 transitions. [2022-07-12 18:35:26,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 18:35:26,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:26,123 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:26,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-07-12 18:35:26,123 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:26,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:26,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1713686024, now seen corresponding path program 1 times [2022-07-12 18:35:26,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:26,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786217550] [2022-07-12 18:35:26,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:26,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:26,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:26,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:26,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786217550] [2022-07-12 18:35:26,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786217550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:35:26,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:35:26,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-12 18:35:26,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319895266] [2022-07-12 18:35:26,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:35:26,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:35:26,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:35:26,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:35:26,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:35:26,389 INFO L87 Difference]: Start difference. First operand 2896 states and 3915 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:27,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:27,215 INFO L93 Difference]: Finished difference Result 3102 states and 4124 transitions. [2022-07-12 18:35:27,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:35:27,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-07-12 18:35:27,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:27,221 INFO L225 Difference]: With dead ends: 3102 [2022-07-12 18:35:27,222 INFO L226 Difference]: Without dead ends: 3102 [2022-07-12 18:35:27,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:35:27,222 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 746 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:27,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 860 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:35:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2022-07-12 18:35:27,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 2883. [2022-07-12 18:35:27,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2589 states have (on average 1.3437620702974122) internal successors, (3479), 2681 states have internal predecessors, (3479), 140 states have call successors, (140), 64 states have call predecessors, (140), 128 states have return successors, (280), 137 states have call predecessors, (280), 140 states have call successors, (280) [2022-07-12 18:35:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 3899 transitions. [2022-07-12 18:35:27,264 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 3899 transitions. Word has length 48 [2022-07-12 18:35:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:27,265 INFO L495 AbstractCegarLoop]: Abstraction has 2883 states and 3899 transitions. [2022-07-12 18:35:27,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:35:27,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 3899 transitions. [2022-07-12 18:35:27,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 18:35:27,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:27,266 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:27,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-07-12 18:35:27,266 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:27,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1600129367, now seen corresponding path program 1 times [2022-07-12 18:35:27,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:27,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180669954] [2022-07-12 18:35:27,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:27,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:28,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:28,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 18:35:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:35:28,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:28,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180669954] [2022-07-12 18:35:28,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180669954] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:35:28,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60718801] [2022-07-12 18:35:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:28,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:35:28,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:35:28,246 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:35:28,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 18:35:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:28,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 18:35:28,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:35:28,642 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 15 treesize of output 11 [2022-07-12 18:35:28,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:28,698 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 30 treesize of output 23 [2022-07-12 18:35:28,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:28,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:28,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:28,932 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:28,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2022-07-12 18:35:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:29,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:35:29,516 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 112 treesize of output 106 [2022-07-12 18:35:29,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:29,542 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 88 treesize of output 82 [2022-07-12 18:35:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:35:30,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60718801] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:35:30,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:35:30,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 19] total 52 [2022-07-12 18:35:30,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072100813] [2022-07-12 18:35:30,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:35:30,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-12 18:35:30,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:35:30,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-12 18:35:30,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2483, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 18:35:30,208 INFO L87 Difference]: Start difference. First operand 2883 states and 3899 transitions. Second operand has 52 states, 52 states have (on average 2.5) internal successors, (130), 49 states have internal predecessors, (130), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:35:38,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:38,446 INFO L93 Difference]: Finished difference Result 5690 states and 7618 transitions. [2022-07-12 18:35:38,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-12 18:35:38,446 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.5) internal successors, (130), 49 states have internal predecessors, (130), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2022-07-12 18:35:38,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:38,455 INFO L225 Difference]: With dead ends: 5690 [2022-07-12 18:35:38,455 INFO L226 Difference]: Without dead ends: 5686 [2022-07-12 18:35:38,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2370 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2161, Invalid=9829, Unknown=0, NotChecked=0, Total=11990 [2022-07-12 18:35:38,457 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 5578 mSDsluCounter, 9928 mSDsCounter, 0 mSdLazyCounter, 5077 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5578 SdHoareTripleChecker+Valid, 10295 SdHoareTripleChecker+Invalid, 5643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 5077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:38,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5578 Valid, 10295 Invalid, 5643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 5077 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-12 18:35:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2022-07-12 18:35:38,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 2556. [2022-07-12 18:35:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2302 states have (on average 1.3327541268462206) internal successors, (3068), 2378 states have internal predecessors, (3068), 120 states have call successors, (120), 54 states have call predecessors, (120), 108 states have return successors, (240), 123 states have call predecessors, (240), 120 states have call successors, (240) [2022-07-12 18:35:38,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 3428 transitions. [2022-07-12 18:35:38,522 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 3428 transitions. Word has length 50 [2022-07-12 18:35:38,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:38,523 INFO L495 AbstractCegarLoop]: Abstraction has 2556 states and 3428 transitions. [2022-07-12 18:35:38,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.5) internal successors, (130), 49 states have internal predecessors, (130), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 18:35:38,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 3428 transitions. [2022-07-12 18:35:38,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 18:35:38,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:38,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:38,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:35:38,736 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,SelfDestructingSolverStorable66 [2022-07-12 18:35:38,736 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1724221356, now seen corresponding path program 1 times [2022-07-12 18:35:38,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:38,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728286253] [2022-07-12 18:35:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:38,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:39,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:39,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:39,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728286253] [2022-07-12 18:35:39,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728286253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:35:39,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556159323] [2022-07-12 18:35:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:39,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:35:39,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:35:39,243 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:35:39,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 18:35:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:39,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-12 18:35:39,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:35:39,465 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:35:39,465 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 11 treesize of output 11 [2022-07-12 18:35:39,559 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 15 treesize of output 11 [2022-07-12 18:35:39,569 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 15 treesize of output 11 [2022-07-12 18:35:39,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:39,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:35:39,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:39,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:35:39,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:39,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:35:39,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:39,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 18:35:39,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-12 18:35:39,898 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 24 treesize of output 26 [2022-07-12 18:35:40,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:35:40,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:40,278 INFO L356 Elim1Store]: treesize reduction 31, result has 20.5 percent of original size [2022-07-12 18:35:40,279 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 45 [2022-07-12 18:35:40,286 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:40,287 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 21 treesize of output 21 [2022-07-12 18:35:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:40,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:35:40,710 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:40,711 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-07-12 18:35:40,719 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:40,720 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2022-07-12 18:35:41,137 INFO L356 Elim1Store]: treesize reduction 26, result has 53.6 percent of original size [2022-07-12 18:35:41,138 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 2 case distinctions, treesize of input 53 treesize of output 49 [2022-07-12 18:35:41,166 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:41,167 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 173 [2022-07-12 18:35:41,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:35:41,181 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:41,181 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 123 treesize of output 119 [2022-07-12 18:35:43,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:35:43,862 INFO L356 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2022-07-12 18:35:43,863 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 1 [2022-07-12 18:35:44,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556159323] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:35:44,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:35:44,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 34 [2022-07-12 18:35:44,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747233657] [2022-07-12 18:35:44,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:35:44,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 18:35:44,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:35:44,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 18:35:44,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2078, Unknown=27, NotChecked=0, Total=2256 [2022-07-12 18:35:44,420 INFO L87 Difference]: Start difference. First operand 2556 states and 3428 transitions. Second operand has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:35:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:35:47,761 INFO L93 Difference]: Finished difference Result 6932 states and 9451 transitions. [2022-07-12 18:35:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-12 18:35:47,762 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-07-12 18:35:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:35:47,776 INFO L225 Difference]: With dead ends: 6932 [2022-07-12 18:35:47,776 INFO L226 Difference]: Without dead ends: 6932 [2022-07-12 18:35:47,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=821, Invalid=5004, Unknown=27, NotChecked=0, Total=5852 [2022-07-12 18:35:47,777 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 3781 mSDsluCounter, 4863 mSDsCounter, 0 mSdLazyCounter, 2420 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3783 SdHoareTripleChecker+Valid, 5040 SdHoareTripleChecker+Invalid, 3231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 2420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 492 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:35:47,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3783 Valid, 5040 Invalid, 3231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 2420 Invalid, 0 Unknown, 492 Unchecked, 1.3s Time] [2022-07-12 18:35:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2022-07-12 18:35:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 4279. [2022-07-12 18:35:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4279 states, 3897 states have (on average 1.331793687451886) internal successors, (5190), 4000 states have internal predecessors, (5190), 200 states have call successors, (200), 78 states have call predecessors, (200), 156 states have return successors, (400), 200 states have call predecessors, (400), 200 states have call successors, (400) [2022-07-12 18:35:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4279 states to 4279 states and 5790 transitions. [2022-07-12 18:35:47,869 INFO L78 Accepts]: Start accepts. Automaton has 4279 states and 5790 transitions. Word has length 50 [2022-07-12 18:35:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:35:47,869 INFO L495 AbstractCegarLoop]: Abstraction has 4279 states and 5790 transitions. [2022-07-12 18:35:47,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:35:47,869 INFO L276 IsEmpty]: Start isEmpty. Operand 4279 states and 5790 transitions. [2022-07-12 18:35:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 18:35:47,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:35:47,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:35:47,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:35:48,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:35:48,083 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-07-12 18:35:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:35:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1023156778, now seen corresponding path program 1 times [2022-07-12 18:35:48,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:35:48,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542647907] [2022-07-12 18:35:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:48,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:35:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:49,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-12 18:35:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:49,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:35:49,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542647907] [2022-07-12 18:35:49,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542647907] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:35:49,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283316706] [2022-07-12 18:35:49,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:35:49,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:35:49,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:35:49,582 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:35:49,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 18:35:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:35:49,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-12 18:35:49,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:35:49,879 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:35:49,879 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 11 treesize of output 11 [2022-07-12 18:35:50,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 18:35:50,011 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 15 treesize of output 11 [2022-07-12 18:35:50,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:50,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-12 18:35:50,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:50,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-12 18:35:50,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:50,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:35:50,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:50,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:35:50,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:50,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-12 18:35:50,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:50,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-07-12 18:35:50,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:50,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:35:50,493 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-12 18:35:50,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 51 [2022-07-12 18:35:50,497 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 24 treesize of output 26 [2022-07-12 18:35:50,719 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:50,720 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 33 treesize of output 21 [2022-07-12 18:35:50,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:35:50,731 INFO L356 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-07-12 18:35:50,731 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 22 [2022-07-12 18:35:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:35:50,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:35:51,005 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1559 Int)) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_1559)))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4))))) 4) 0)) (forall ((v_ArrVal_1561 (Array Int Int)) (v_ArrVal_1559 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1561) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_1559)) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4)))) 4) 0))) is different from false [2022-07-12 18:35:56,310 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:35:56,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 74197889 treesize of output 73534679