./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:05:38,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:05:38,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:05:38,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:05:38,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:05:38,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:05:38,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:05:38,054 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:05:38,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:05:38,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:05:38,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:05:38,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:05:38,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:05:38,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:05:38,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:05:38,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:05:38,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:05:38,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:05:38,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:05:38,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:05:38,080 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:05:38,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:05:38,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:05:38,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:05:38,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:05:38,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:05:38,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:05:38,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:05:38,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:05:38,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:05:38,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:05:38,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:05:38,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:05:38,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:05:38,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:05:38,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:05:38,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:05:38,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:05:38,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:05:38,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:05:38,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:05:38,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:05:38,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:05:38,129 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:05:38,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:05:38,130 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:05:38,131 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:05:38,131 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:05:38,131 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:05:38,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:05:38,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:05:38,132 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:05:38,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:05:38,133 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:05:38,134 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:05:38,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:05:38,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:05:38,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:05:38,134 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:05:38,134 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:05:38,135 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:05:38,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:05:38,135 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:05:38,135 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:05:38,135 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:05:38,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:05:38,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:05:38,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:05:38,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:05:38,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:05:38,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:05:38,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:05:38,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:05:38,137 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 [2022-07-14 06:05:38,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:05:38,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:05:38,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:05:38,468 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:05:38,469 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:05:38,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2022-07-14 06:05:38,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7b7cdd03/2889dc64f36a41ef87e1fa09a09d6ca3/FLAG79b548d99 [2022-07-14 06:05:39,338 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:05:39,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2022-07-14 06:05:39,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7b7cdd03/2889dc64f36a41ef87e1fa09a09d6ca3/FLAG79b548d99 [2022-07-14 06:05:39,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7b7cdd03/2889dc64f36a41ef87e1fa09a09d6ca3 [2022-07-14 06:05:39,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:05:39,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:05:39,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:05:39,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:05:39,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:05:39,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:05:39" (1/1) ... [2022-07-14 06:05:39,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f1d670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:39, skipping insertion in model container [2022-07-14 06:05:39,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:05:39" (1/1) ... [2022-07-14 06:05:39,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:05:39,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:05:40,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:05:40,064 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:05:40,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:05:40,189 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:05:40,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:40 WrapperNode [2022-07-14 06:05:40,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:05:40,191 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:05:40,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:05:40,193 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:05:40,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:40" (1/1) ... [2022-07-14 06:05:40,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:40" (1/1) ... [2022-07-14 06:05:40,288 INFO L137 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2022-07-14 06:05:40,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:05:40,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:05:40,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:05:40,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:05:40,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:40" (1/1) ... [2022-07-14 06:05:40,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:40" (1/1) ... [2022-07-14 06:05:40,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:40" (1/1) ... [2022-07-14 06:05:40,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:40" (1/1) ... [2022-07-14 06:05:40,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:40" (1/1) ... [2022-07-14 06:05:40,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:40" (1/1) ... [2022-07-14 06:05:40,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:40" (1/1) ... [2022-07-14 06:05:40,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:05:40,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:05:40,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:05:40,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:05:40,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:40" (1/1) ... [2022-07-14 06:05:40,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:05:40,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:40,413 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) [2022-07-14 06:05:40,426 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 [2022-07-14 06:05:40,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 06:05:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 06:05:40,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:05:40,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:05:40,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:05:40,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:05:40,644 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:05:40,661 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:05:41,062 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:05:41,068 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:05:41,072 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-14 06:05:41,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:05:41 BoogieIcfgContainer [2022-07-14 06:05:41,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:05:41,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:05:41,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:05:41,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:05:41,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:05:39" (1/3) ... [2022-07-14 06:05:41,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fedcfef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:05:41, skipping insertion in model container [2022-07-14 06:05:41,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:05:40" (2/3) ... [2022-07-14 06:05:41,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fedcfef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:05:41, skipping insertion in model container [2022-07-14 06:05:41,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:05:41" (3/3) ... [2022-07-14 06:05:41,083 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca-2.i [2022-07-14 06:05:41,097 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:05:41,098 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-07-14 06:05:41,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:05:41,161 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@1073249a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7bfd3d12 [2022-07-14 06:05:41,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-07-14 06:05:41,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 32 states have (on average 1.96875) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:41,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:05:41,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:41,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:41,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:41,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:41,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031113, now seen corresponding path program 1 times [2022-07-14 06:05:41,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:41,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875252399] [2022-07-14 06:05:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:41,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:41,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:41,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875252399] [2022-07-14 06:05:41,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875252399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:41,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:41,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:05:41,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234914375] [2022-07-14 06:05:41,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:41,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:05:41,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:41,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:05:41,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:05:41,409 INFO L87 Difference]: Start difference. First operand has 50 states, 32 states have (on average 1.96875) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:41,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:41,466 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-07-14 06:05:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:05:41,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:05:41,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:41,476 INFO L225 Difference]: With dead ends: 51 [2022-07-14 06:05:41,476 INFO L226 Difference]: Without dead ends: 48 [2022-07-14 06:05:41,478 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 [2022-07-14 06:05:41,482 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 5 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:41,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 86 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:41,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-14 06:05:41,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-14 06:05:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:41,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-07-14 06:05:41,520 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 7 [2022-07-14 06:05:41,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:41,521 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-07-14 06:05:41,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:41,521 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-07-14 06:05:41,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 06:05:41,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:41,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:41,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 06:05:41,523 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:41,524 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-07-14 06:05:41,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:41,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840968234] [2022-07-14 06:05:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:41,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:41,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:41,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840968234] [2022-07-14 06:05:41,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840968234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:41,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:41,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:05:41,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103128868] [2022-07-14 06:05:41,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:41,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:05:41,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:41,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:05:41,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:05:41,600 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:41,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:41,662 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-07-14 06:05:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:05:41,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-14 06:05:41,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:41,664 INFO L225 Difference]: With dead ends: 51 [2022-07-14 06:05:41,664 INFO L226 Difference]: Without dead ends: 48 [2022-07-14 06:05:41,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:05:41,666 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:41,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 185 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-14 06:05:41,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-14 06:05:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:41,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-07-14 06:05:41,671 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 8 [2022-07-14 06:05:41,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:41,672 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-07-14 06:05:41,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:41,672 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-07-14 06:05:41,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 06:05:41,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:41,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:41,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 06:05:41,673 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:41,674 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-07-14 06:05:41,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:41,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583131911] [2022-07-14 06:05:41,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:41,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:41,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:41,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583131911] [2022-07-14 06:05:41,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583131911] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:41,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:41,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:05:41,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471167281] [2022-07-14 06:05:41,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:41,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:05:41,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:41,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:05:41,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:05:41,784 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:41,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:41,826 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-07-14 06:05:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:05:41,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-14 06:05:41,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:41,831 INFO L225 Difference]: With dead ends: 46 [2022-07-14 06:05:41,831 INFO L226 Difference]: Without dead ends: 46 [2022-07-14 06:05:41,832 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 [2022-07-14 06:05:41,839 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 42 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:41,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:41,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-14 06:05:41,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-14 06:05:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-07-14 06:05:41,850 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 8 [2022-07-14 06:05:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:41,850 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-07-14 06:05:41,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:41,851 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-07-14 06:05:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 06:05:41,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:41,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:41,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 06:05:41,852 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:41,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:41,852 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2022-07-14 06:05:41,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:41,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134822912] [2022-07-14 06:05:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:41,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:42,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:42,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134822912] [2022-07-14 06:05:42,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134822912] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:42,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:42,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:05:42,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851287936] [2022-07-14 06:05:42,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:42,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:05:42,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:42,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:05:42,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:05:42,232 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:42,720 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-07-14 06:05:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:05:42,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-14 06:05:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:42,722 INFO L225 Difference]: With dead ends: 85 [2022-07-14 06:05:42,722 INFO L226 Difference]: Without dead ends: 85 [2022-07-14 06:05:42,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:05:42,723 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 132 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:42,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 64 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:05:42,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-14 06:05:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 48. [2022-07-14 06:05:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.696969696969697) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:42,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-07-14 06:05:42,732 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 8 [2022-07-14 06:05:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:42,732 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-07-14 06:05:42,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-07-14 06:05:42,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:05:42,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:42,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:42,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 06:05:42,734 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:42,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:42,735 INFO L85 PathProgramCache]: Analyzing trace with hash -118766615, now seen corresponding path program 1 times [2022-07-14 06:05:42,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:42,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799917570] [2022-07-14 06:05:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:42,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:42,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:42,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799917570] [2022-07-14 06:05:42,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799917570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:42,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:42,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:05:42,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116837625] [2022-07-14 06:05:42,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:42,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:05:42,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:42,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:05:42,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:05:42,841 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.0) 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) [2022-07-14 06:05:42,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:42,906 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-07-14 06:05:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:05:42,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) 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 [2022-07-14 06:05:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:42,909 INFO L225 Difference]: With dead ends: 50 [2022-07-14 06:05:42,909 INFO L226 Difference]: Without dead ends: 50 [2022-07-14 06:05:42,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:05:42,925 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 103 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:42,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 84 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-14 06:05:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-07-14 06:05:42,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-07-14 06:05:42,930 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 10 [2022-07-14 06:05:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:42,930 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-07-14 06:05:42,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) 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) [2022-07-14 06:05:42,931 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-07-14 06:05:42,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:05:42,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:42,931 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:42,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 06:05:42,932 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:42,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:42,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2022-07-14 06:05:42,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:42,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122110335] [2022-07-14 06:05:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:42,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:43,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:43,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122110335] [2022-07-14 06:05:43,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122110335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:43,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952612039] [2022-07-14 06:05:43,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:43,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:43,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:43,121 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) [2022-07-14 06:05:43,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 06:05:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:43,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 06:05:43,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:43,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:05:43,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:05:43,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:05:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:43,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:43,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952612039] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:43,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:43,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-14 06:05:43,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455029261] [2022-07-14 06:05:43,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:43,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:05:43,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:43,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:05:43,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:05:43,794 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:44,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:44,018 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-07-14 06:05:44,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:05:44,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-14 06:05:44,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:44,025 INFO L225 Difference]: With dead ends: 85 [2022-07-14 06:05:44,025 INFO L226 Difference]: Without dead ends: 85 [2022-07-14 06:05:44,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:05:44,030 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 90 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:44,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 179 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:05:44,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-14 06:05:44,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 46. [2022-07-14 06:05:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.65625) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:44,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-07-14 06:05:44,062 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 12 [2022-07-14 06:05:44,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:44,063 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-07-14 06:05:44,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:44,063 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-07-14 06:05:44,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:05:44,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:44,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:44,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:44,283 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,SelfDestructingSolverStorable5 [2022-07-14 06:05:44,284 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:44,284 INFO L85 PathProgramCache]: Analyzing trace with hash 840060780, now seen corresponding path program 1 times [2022-07-14 06:05:44,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:44,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544709655] [2022-07-14 06:05:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:44,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:44,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:44,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544709655] [2022-07-14 06:05:44,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544709655] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:44,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000332291] [2022-07-14 06:05:44,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:44,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:44,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:44,535 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) [2022-07-14 06:05:44,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 06:05:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:44,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 06:05:44,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:44,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:05:44,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000332291] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:44,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:05:44,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2022-07-14 06:05:44,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387298252] [2022-07-14 06:05:44,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:44,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:05:44,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:44,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:05:44,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:05:44,855 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:44,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:44,962 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-07-14 06:05:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:05:44,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-07-14 06:05:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:44,965 INFO L225 Difference]: With dead ends: 45 [2022-07-14 06:05:44,965 INFO L226 Difference]: Without dead ends: 45 [2022-07-14 06:05:44,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:05:44,967 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 213 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:44,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 57 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:05:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-14 06:05:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-14 06:05:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.625) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-07-14 06:05:44,998 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 14 [2022-07-14 06:05:44,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:44,999 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-07-14 06:05:45,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,001 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-07-14 06:05:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:05:45,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:45,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:45,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:45,219 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,SelfDestructingSolverStorable6 [2022-07-14 06:05:45,219 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:45,220 INFO L85 PathProgramCache]: Analyzing trace with hash 840060832, now seen corresponding path program 1 times [2022-07-14 06:05:45,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:45,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781928923] [2022-07-14 06:05:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:45,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:45,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:45,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781928923] [2022-07-14 06:05:45,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781928923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:45,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:45,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:05:45,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193697621] [2022-07-14 06:05:45,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:45,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:05:45,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:45,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:05:45,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:05:45,370 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:45,395 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2022-07-14 06:05:45,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:05:45,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-07-14 06:05:45,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:45,397 INFO L225 Difference]: With dead ends: 81 [2022-07-14 06:05:45,397 INFO L226 Difference]: Without dead ends: 81 [2022-07-14 06:05:45,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:05:45,398 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 33 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:45,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 129 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:45,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-14 06:05:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-07-14 06:05:45,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-07-14 06:05:45,413 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2022-07-14 06:05:45,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:45,414 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-07-14 06:05:45,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,414 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-07-14 06:05:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:05:45,415 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:45,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:45,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-14 06:05:45,415 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:45,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:45,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125410, now seen corresponding path program 1 times [2022-07-14 06:05:45,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:45,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899138822] [2022-07-14 06:05:45,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:45,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:45,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:45,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899138822] [2022-07-14 06:05:45,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899138822] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:45,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:45,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:05:45,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456037821] [2022-07-14 06:05:45,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:45,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:05:45,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:05:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:05:45,454 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:45,472 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-07-14 06:05:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:05:45,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-07-14 06:05:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:45,473 INFO L225 Difference]: With dead ends: 52 [2022-07-14 06:05:45,473 INFO L226 Difference]: Without dead ends: 52 [2022-07-14 06:05:45,473 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 [2022-07-14 06:05:45,474 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 32 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:45,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 38 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:45,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-14 06:05:45,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-14 06:05:45,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-07-14 06:05:45,477 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 14 [2022-07-14 06:05:45,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:45,477 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-07-14 06:05:45,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-07-14 06:05:45,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:05:45,478 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:45,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:45,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-14 06:05:45,478 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:45,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:45,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125411, now seen corresponding path program 1 times [2022-07-14 06:05:45,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:45,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891889664] [2022-07-14 06:05:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:45,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:45,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891889664] [2022-07-14 06:05:45,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891889664] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:45,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:45,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:05:45,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624832371] [2022-07-14 06:05:45,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:45,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:05:45,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:45,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:05:45,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:05:45,560 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:45,628 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2022-07-14 06:05:45,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:05:45,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-07-14 06:05:45,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:45,629 INFO L225 Difference]: With dead ends: 82 [2022-07-14 06:05:45,629 INFO L226 Difference]: Without dead ends: 82 [2022-07-14 06:05:45,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:05:45,630 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 177 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:45,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 60 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-14 06:05:45,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2022-07-14 06:05:45,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-07-14 06:05:45,633 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 14 [2022-07-14 06:05:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:45,634 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-07-14 06:05:45,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-07-14 06:05:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-14 06:05:45,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:45,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:45,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-14 06:05:45,635 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:45,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:45,636 INFO L85 PathProgramCache]: Analyzing trace with hash 272080408, now seen corresponding path program 1 times [2022-07-14 06:05:45,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:45,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513135382] [2022-07-14 06:05:45,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:45,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:45,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:45,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513135382] [2022-07-14 06:05:45,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513135382] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:45,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:45,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:05:45,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524602422] [2022-07-14 06:05:45,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:45,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:05:45,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:45,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:05:45,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:05:45,686 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:45,706 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-07-14 06:05:45,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:05:45,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-07-14 06:05:45,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:45,707 INFO L225 Difference]: With dead ends: 53 [2022-07-14 06:05:45,707 INFO L226 Difference]: Without dead ends: 53 [2022-07-14 06:05:45,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:05:45,708 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 74 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:45,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 35 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:45,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-14 06:05:45,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-14 06:05:45,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-07-14 06:05:45,712 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 15 [2022-07-14 06:05:45,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:45,712 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-07-14 06:05:45,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,713 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-07-14 06:05:45,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:05:45,713 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:45,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:45,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-14 06:05:45,714 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:45,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:45,714 INFO L85 PathProgramCache]: Analyzing trace with hash 944154227, now seen corresponding path program 1 times [2022-07-14 06:05:45,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:45,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070338009] [2022-07-14 06:05:45,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:45,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:45,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:45,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070338009] [2022-07-14 06:05:45,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070338009] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:45,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:45,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:05:45,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517588001] [2022-07-14 06:05:45,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:45,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:05:45,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:45,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:05:45,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:05:45,788 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:45,833 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2022-07-14 06:05:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:05:45,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-14 06:05:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:45,835 INFO L225 Difference]: With dead ends: 52 [2022-07-14 06:05:45,835 INFO L226 Difference]: Without dead ends: 52 [2022-07-14 06:05:45,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:05:45,836 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 59 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:45,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 63 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:45,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-14 06:05:45,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-07-14 06:05:45,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-14 06:05:45,840 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 18 [2022-07-14 06:05:45,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:45,841 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-14 06:05:45,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-14 06:05:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:05:45,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:45,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:45,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-14 06:05:45,843 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:45,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:45,844 INFO L85 PathProgramCache]: Analyzing trace with hash 944154228, now seen corresponding path program 1 times [2022-07-14 06:05:45,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:45,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580931263] [2022-07-14 06:05:45,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:45,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:45,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:45,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580931263] [2022-07-14 06:05:45,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580931263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:45,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338527119] [2022-07-14 06:05:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:45,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:45,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:45,968 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) [2022-07-14 06:05:45,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 06:05:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-14 06:05:46,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:46,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:05:46,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:05:46,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:05:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:46,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:05:46,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338527119] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:46,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:05:46,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2022-07-14 06:05:46,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813040136] [2022-07-14 06:05:46,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:46,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:05:46,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:46,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:05:46,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:05:46,317 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:46,424 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-07-14 06:05:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:05:46,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-14 06:05:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:46,425 INFO L225 Difference]: With dead ends: 63 [2022-07-14 06:05:46,425 INFO L226 Difference]: Without dead ends: 63 [2022-07-14 06:05:46,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-14 06:05:46,427 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 176 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:46,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 72 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:05:46,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-14 06:05:46,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2022-07-14 06:05:46,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.42) internal successors, (71), 56 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-07-14 06:05:46,434 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 18 [2022-07-14 06:05:46,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:46,434 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-07-14 06:05:46,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-07-14 06:05:46,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:05:46,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:46,438 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:46,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:46,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:46,651 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:46,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:46,652 INFO L85 PathProgramCache]: Analyzing trace with hash -287041178, now seen corresponding path program 1 times [2022-07-14 06:05:46,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:46,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697343661] [2022-07-14 06:05:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:46,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:46,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:46,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697343661] [2022-07-14 06:05:46,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697343661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:46,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892709827] [2022-07-14 06:05:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:46,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:46,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:46,737 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) [2022-07-14 06:05:46,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 06:05:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:46,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:05:46,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:46,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:46,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892709827] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:46,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:46,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-14 06:05:46,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178643924] [2022-07-14 06:05:46,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:46,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:05:46,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:46,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:05:46,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:05:46,942 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:47,104 INFO L93 Difference]: Finished difference Result 133 states and 163 transitions. [2022-07-14 06:05:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:05:47,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-14 06:05:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:47,106 INFO L225 Difference]: With dead ends: 133 [2022-07-14 06:05:47,106 INFO L226 Difference]: Without dead ends: 133 [2022-07-14 06:05:47,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:05:47,106 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 341 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:47,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 231 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:05:47,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-14 06:05:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 61. [2022-07-14 06:05:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 60 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2022-07-14 06:05:47,109 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 18 [2022-07-14 06:05:47,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:47,110 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2022-07-14 06:05:47,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:47,110 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2022-07-14 06:05:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-14 06:05:47,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:47,111 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] [2022-07-14 06:05:47,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:47,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:47,331 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:47,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:47,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1095465713, now seen corresponding path program 1 times [2022-07-14 06:05:47,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:47,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925484468] [2022-07-14 06:05:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:47,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:47,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:47,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925484468] [2022-07-14 06:05:47,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925484468] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:47,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:47,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:05:47,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405872128] [2022-07-14 06:05:47,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:47,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:05:47,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:47,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:05:47,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:05:47,401 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:47,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:47,434 INFO L93 Difference]: Finished difference Result 130 states and 156 transitions. [2022-07-14 06:05:47,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:05:47,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-14 06:05:47,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:47,436 INFO L225 Difference]: With dead ends: 130 [2022-07-14 06:05:47,436 INFO L226 Difference]: Without dead ends: 130 [2022-07-14 06:05:47,436 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 [2022-07-14 06:05:47,437 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 57 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:47,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 134 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-14 06:05:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2022-07-14 06:05:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 83 states have (on average 1.3373493975903614) internal successors, (111), 89 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2022-07-14 06:05:47,440 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 20 [2022-07-14 06:05:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:47,440 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2022-07-14 06:05:47,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2022-07-14 06:05:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-14 06:05:47,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:47,441 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] [2022-07-14 06:05:47,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-14 06:05:47,441 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:47,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:47,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1094114349, now seen corresponding path program 1 times [2022-07-14 06:05:47,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:47,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457797702] [2022-07-14 06:05:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:47,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:47,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:47,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457797702] [2022-07-14 06:05:47,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457797702] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:47,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404152766] [2022-07-14 06:05:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:47,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:47,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:47,589 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) [2022-07-14 06:05:47,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 06:05:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:47,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-14 06:05:47,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:47,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:05:47,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:05:47,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:05:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:47,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:47,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:05:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:47,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404152766] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:47,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:47,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-07-14 06:05:47,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981455588] [2022-07-14 06:05:47,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:47,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-14 06:05:47,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:47,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-14 06:05:47,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:05:47,965 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:48,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:48,157 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2022-07-14 06:05:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:05:48,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-14 06:05:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:48,158 INFO L225 Difference]: With dead ends: 121 [2022-07-14 06:05:48,158 INFO L226 Difference]: Without dead ends: 121 [2022-07-14 06:05:48,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:05:48,159 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 510 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:48,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 144 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:05:48,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-14 06:05:48,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2022-07-14 06:05:48,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 89 states have (on average 1.348314606741573) internal successors, (120), 95 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2022-07-14 06:05:48,162 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 20 [2022-07-14 06:05:48,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:48,162 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2022-07-14 06:05:48,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2022-07-14 06:05:48,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-14 06:05:48,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:48,162 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] [2022-07-14 06:05:48,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:48,371 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,SelfDestructingSolverStorable15 [2022-07-14 06:05:48,371 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:48,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:48,372 INFO L85 PathProgramCache]: Analyzing trace with hash 74397359, now seen corresponding path program 1 times [2022-07-14 06:05:48,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:48,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154474740] [2022-07-14 06:05:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:48,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:48,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:48,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154474740] [2022-07-14 06:05:48,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154474740] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:48,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:48,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:05:48,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075056980] [2022-07-14 06:05:48,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:48,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:05:48,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:48,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:05:48,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:05:48,455 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:48,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:48,475 INFO L93 Difference]: Finished difference Result 108 states and 131 transitions. [2022-07-14 06:05:48,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:05:48,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-14 06:05:48,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:48,477 INFO L225 Difference]: With dead ends: 108 [2022-07-14 06:05:48,477 INFO L226 Difference]: Without dead ends: 108 [2022-07-14 06:05:48,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:05:48,478 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 104 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:48,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 74 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-14 06:05:48,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 67. [2022-07-14 06:05:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.4) internal successors, (84), 66 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2022-07-14 06:05:48,483 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 20 [2022-07-14 06:05:48,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:48,483 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2022-07-14 06:05:48,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:48,483 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2022-07-14 06:05:48,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-14 06:05:48,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:48,486 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] [2022-07-14 06:05:48,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-14 06:05:48,487 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:48,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:48,487 INFO L85 PathProgramCache]: Analyzing trace with hash -442195040, now seen corresponding path program 1 times [2022-07-14 06:05:48,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:48,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486701192] [2022-07-14 06:05:48,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:48,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:48,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:48,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486701192] [2022-07-14 06:05:48,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486701192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:48,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:48,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:05:48,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402301000] [2022-07-14 06:05:48,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:48,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:05:48,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:48,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:05:48,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:05:48,577 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:48,686 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2022-07-14 06:05:48,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:05:48,687 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-14 06:05:48,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:48,688 INFO L225 Difference]: With dead ends: 66 [2022-07-14 06:05:48,688 INFO L226 Difference]: Without dead ends: 66 [2022-07-14 06:05:48,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:05:48,689 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 66 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:48,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 84 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:05:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-14 06:05:48,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-14 06:05:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.35) internal successors, (81), 65 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:48,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2022-07-14 06:05:48,705 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 21 [2022-07-14 06:05:48,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:48,705 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2022-07-14 06:05:48,705 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:48,705 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2022-07-14 06:05:48,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-14 06:05:48,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:48,705 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] [2022-07-14 06:05:48,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-14 06:05:48,705 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:48,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:48,706 INFO L85 PathProgramCache]: Analyzing trace with hash -442195039, now seen corresponding path program 1 times [2022-07-14 06:05:48,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:48,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951209844] [2022-07-14 06:05:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:48,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:48,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:48,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951209844] [2022-07-14 06:05:48,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951209844] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:48,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:48,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:05:48,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707082410] [2022-07-14 06:05:48,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:48,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:05:48,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:48,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:05:48,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:05:48,816 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:48,896 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2022-07-14 06:05:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:05:48,896 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-14 06:05:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:48,898 INFO L225 Difference]: With dead ends: 70 [2022-07-14 06:05:48,898 INFO L226 Difference]: Without dead ends: 70 [2022-07-14 06:05:48,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:05:48,899 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 138 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:48,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 90 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:48,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-14 06:05:48,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-07-14 06:05:48,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2022-07-14 06:05:48,903 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 21 [2022-07-14 06:05:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:48,904 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2022-07-14 06:05:48,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2022-07-14 06:05:48,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:05:48,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:48,904 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] [2022-07-14 06:05:48,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-14 06:05:48,905 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:48,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:48,905 INFO L85 PathProgramCache]: Analyzing trace with hash -823097434, now seen corresponding path program 2 times [2022-07-14 06:05:48,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:48,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680514251] [2022-07-14 06:05:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:48,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:49,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:49,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680514251] [2022-07-14 06:05:49,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680514251] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:49,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502163819] [2022-07-14 06:05:49,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:05:49,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:49,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:49,140 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) [2022-07-14 06:05:49,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 06:05:49,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:05:49,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:49,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-14 06:05:49,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:49,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:05:49,359 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 17 treesize of output 13 [2022-07-14 06:05:49,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-14 06:05:49,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:05:49,528 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:49,529 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 10 [2022-07-14 06:05:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:49,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:49,624 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_237 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_~d~0#1.offset_19| Int)) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrncat_~d~0#1.offset_19|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_237) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |v_ULTIMATE.start_cstrncat_~d~0#1.offset_19|) 0) (not (<= 0 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_19|)))) is different from false [2022-07-14 06:05:49,635 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:49,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-07-14 06:05:49,642 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:49,643 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 36 treesize of output 36 [2022-07-14 06:05:49,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-14 06:05:50,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:05:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:50,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502163819] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:50,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:50,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-07-14 06:05:50,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669042653] [2022-07-14 06:05:50,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:50,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 06:05:50,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:50,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 06:05:50,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=527, Unknown=1, NotChecked=46, Total=650 [2022-07-14 06:05:50,156 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:50,496 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2022-07-14 06:05:50,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:05:50,497 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-14 06:05:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:50,497 INFO L225 Difference]: With dead ends: 86 [2022-07-14 06:05:50,497 INFO L226 Difference]: Without dead ends: 86 [2022-07-14 06:05:50,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=847, Unknown=1, NotChecked=60, Total=1056 [2022-07-14 06:05:50,498 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 96 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:50,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 435 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 159 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2022-07-14 06:05:50,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-14 06:05:50,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2022-07-14 06:05:50,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.2837837837837838) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2022-07-14 06:05:50,501 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 22 [2022-07-14 06:05:50,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:50,501 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2022-07-14 06:05:50,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:50,501 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2022-07-14 06:05:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:05:50,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:50,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:50,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-14 06:05:50,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:50,702 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:50,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:50,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1863163671, now seen corresponding path program 2 times [2022-07-14 06:05:50,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:50,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963965311] [2022-07-14 06:05:50,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:50,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:50,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:50,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963965311] [2022-07-14 06:05:50,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963965311] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:50,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634009499] [2022-07-14 06:05:50,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:05:50,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:50,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:50,890 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) [2022-07-14 06:05:50,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 06:05:50,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:05:50,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:50,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 06:05:50,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:51,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:51,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634009499] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:51,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:51,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-14 06:05:51,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920372223] [2022-07-14 06:05:51,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:51,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 06:05:51,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:51,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 06:05:51,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:05:51,451 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:51,780 INFO L93 Difference]: Finished difference Result 234 states and 274 transitions. [2022-07-14 06:05:51,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:05:51,780 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-14 06:05:51,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:51,781 INFO L225 Difference]: With dead ends: 234 [2022-07-14 06:05:51,782 INFO L226 Difference]: Without dead ends: 234 [2022-07-14 06:05:51,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2022-07-14 06:05:51,783 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 775 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:51,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [775 Valid, 331 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:05:51,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-14 06:05:51,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 89. [2022-07-14 06:05:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 88 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:51,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2022-07-14 06:05:51,789 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 22 [2022-07-14 06:05:51,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:51,789 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2022-07-14 06:05:51,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:51,789 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2022-07-14 06:05:51,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:05:51,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:51,790 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:51,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:52,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:52,015 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:52,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:52,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1330977111, now seen corresponding path program 3 times [2022-07-14 06:05:52,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:52,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029548314] [2022-07-14 06:05:52,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:52,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:52,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:52,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029548314] [2022-07-14 06:05:52,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029548314] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:52,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079871170] [2022-07-14 06:05:52,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:05:52,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:52,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:52,264 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) [2022-07-14 06:05:52,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 06:05:52,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:05:52,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:52,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-14 06:05:52,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:52,482 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:05:52,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:05:52,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:05:52,830 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:52,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-14 06:05:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:52,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:53,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-07-14 06:05:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:53,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079871170] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:53,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:53,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2022-07-14 06:05:53,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265761399] [2022-07-14 06:05:53,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:53,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-14 06:05:53,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:53,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-14 06:05:53,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-07-14 06:05:53,327 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand has 29 states, 28 states have (on average 2.5) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:54,531 INFO L93 Difference]: Finished difference Result 222 states and 253 transitions. [2022-07-14 06:05:54,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-14 06:05:54,533 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.5) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 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 26 [2022-07-14 06:05:54,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:54,534 INFO L225 Difference]: With dead ends: 222 [2022-07-14 06:05:54,534 INFO L226 Difference]: Without dead ends: 222 [2022-07-14 06:05:54,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=383, Invalid=2167, Unknown=0, NotChecked=0, Total=2550 [2022-07-14 06:05:54,536 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 407 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:54,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 716 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 745 Invalid, 0 Unknown, 81 Unchecked, 0.5s Time] [2022-07-14 06:05:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-14 06:05:54,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 99. [2022-07-14 06:05:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.2903225806451613) internal successors, (120), 98 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:54,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2022-07-14 06:05:54,540 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 26 [2022-07-14 06:05:54,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:54,540 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2022-07-14 06:05:54,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.5) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:54,541 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2022-07-14 06:05:54,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:05:54,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:54,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:54,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:54,759 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,SelfDestructingSolverStorable21 [2022-07-14 06:05:54,759 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:54,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1807429356, now seen corresponding path program 3 times [2022-07-14 06:05:54,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:54,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679957146] [2022-07-14 06:05:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:54,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:05:55,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:55,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679957146] [2022-07-14 06:05:55,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679957146] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:55,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784542270] [2022-07-14 06:05:55,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:05:55,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:55,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:55,186 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) [2022-07-14 06:05:55,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 06:05:55,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-14 06:05:55,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:55,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:05:55,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:55,283 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:05:55,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:05:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:05:55,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:05:55,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784542270] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:55,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:55,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-14 06:05:55,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805578659] [2022-07-14 06:05:55,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:55,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:05:55,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:05:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:05:55,709 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:55,869 INFO L93 Difference]: Finished difference Result 194 states and 236 transitions. [2022-07-14 06:05:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:05:55,870 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), 0 states have call successors, (0), 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 26 [2022-07-14 06:05:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:55,871 INFO L225 Difference]: With dead ends: 194 [2022-07-14 06:05:55,871 INFO L226 Difference]: Without dead ends: 194 [2022-07-14 06:05:55,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:05:55,872 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 208 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:55,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 180 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:05:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-14 06:05:55,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 96. [2022-07-14 06:05:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 95 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:55,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2022-07-14 06:05:55,875 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 26 [2022-07-14 06:05:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:55,875 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2022-07-14 06:05:55,875 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:55,875 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2022-07-14 06:05:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:05:55,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:55,875 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] [2022-07-14 06:05:55,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:56,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:56,083 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:56,084 INFO L85 PathProgramCache]: Analyzing trace with hash 803583084, now seen corresponding path program 1 times [2022-07-14 06:05:56,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:56,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083006879] [2022-07-14 06:05:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:56,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:56,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:56,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083006879] [2022-07-14 06:05:56,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083006879] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:56,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:56,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:05:56,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971968064] [2022-07-14 06:05:56,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:56,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:05:56,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:56,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:05:56,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:05:56,251 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:56,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:56,270 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2022-07-14 06:05:56,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:05:56,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-14 06:05:56,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:56,271 INFO L225 Difference]: With dead ends: 95 [2022-07-14 06:05:56,271 INFO L226 Difference]: Without dead ends: 91 [2022-07-14 06:05:56,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:05:56,272 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:56,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 65 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:56,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-14 06:05:56,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-07-14 06:05:56,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-07-14 06:05:56,275 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 27 [2022-07-14 06:05:56,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:56,276 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-07-14 06:05:56,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:56,277 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-07-14 06:05:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:05:56,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:56,277 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:56,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-14 06:05:56,278 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:56,278 INFO L85 PathProgramCache]: Analyzing trace with hash 805151438, now seen corresponding path program 1 times [2022-07-14 06:05:56,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:56,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135581014] [2022-07-14 06:05:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:56,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:56,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:56,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135581014] [2022-07-14 06:05:56,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135581014] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:56,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:05:56,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:05:56,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625729105] [2022-07-14 06:05:56,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:56,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:05:56,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:56,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:05:56,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:05:56,372 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:56,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:56,421 INFO L93 Difference]: Finished difference Result 167 states and 189 transitions. [2022-07-14 06:05:56,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:05:56,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-14 06:05:56,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:56,422 INFO L225 Difference]: With dead ends: 167 [2022-07-14 06:05:56,423 INFO L226 Difference]: Without dead ends: 147 [2022-07-14 06:05:56,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:05:56,424 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 17 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:56,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 128 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:05:56,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-07-14 06:05:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2022-07-14 06:05:56,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.1857142857142857) internal successors, (166), 143 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:56,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 166 transitions. [2022-07-14 06:05:56,440 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 166 transitions. Word has length 27 [2022-07-14 06:05:56,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:56,440 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 166 transitions. [2022-07-14 06:05:56,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 166 transitions. [2022-07-14 06:05:56,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:05:56,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:56,441 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:56,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-14 06:05:56,442 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:56,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:56,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1000286896, now seen corresponding path program 1 times [2022-07-14 06:05:56,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:56,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622263790] [2022-07-14 06:05:56,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:56,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:56,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:56,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622263790] [2022-07-14 06:05:56,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622263790] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:56,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906774534] [2022-07-14 06:05:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:56,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:56,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:56,587 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) [2022-07-14 06:05:56,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-14 06:05:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:56,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-14 06:05:56,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:56,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:05:56,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:05:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:56,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:05:56,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906774534] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:05:56,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:05:56,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-07-14 06:05:56,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141460367] [2022-07-14 06:05:56,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:05:56,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:05:56,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:56,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:05:56,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:05:56,857 INFO L87 Difference]: Start difference. First operand 144 states and 166 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:56,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:56,994 INFO L93 Difference]: Finished difference Result 193 states and 216 transitions. [2022-07-14 06:05:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:05:56,994 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-14 06:05:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:56,995 INFO L225 Difference]: With dead ends: 193 [2022-07-14 06:05:56,995 INFO L226 Difference]: Without dead ends: 169 [2022-07-14 06:05:56,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:05:56,996 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:56,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 213 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:05:56,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-14 06:05:56,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 145. [2022-07-14 06:05:56,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 141 states have (on average 1.177304964539007) internal successors, (166), 144 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:56,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2022-07-14 06:05:56,999 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 27 [2022-07-14 06:05:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:56,999 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2022-07-14 06:05:56,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2022-07-14 06:05:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:05:57,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:57,000 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:57,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:57,216 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,SelfDestructingSolverStorable25 [2022-07-14 06:05:57,217 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:57,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1134300402, now seen corresponding path program 1 times [2022-07-14 06:05:57,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:57,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865085776] [2022-07-14 06:05:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:57,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:57,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:57,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865085776] [2022-07-14 06:05:57,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865085776] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:57,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844017833] [2022-07-14 06:05:57,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:57,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:57,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:57,356 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) [2022-07-14 06:05:57,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 06:05:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:57,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-14 06:05:57,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:57,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:05:57,584 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:57,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-14 06:05:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:57,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:57,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:05:57,960 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 16 treesize of output 12 [2022-07-14 06:05:57,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:05:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:57,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844017833] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:57,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:57,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-07-14 06:05:57,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671343322] [2022-07-14 06:05:57,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:57,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-14 06:05:57,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:57,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-14 06:05:57,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:05:57,990 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:58,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:58,392 INFO L93 Difference]: Finished difference Result 195 states and 216 transitions. [2022-07-14 06:05:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 06:05:58,393 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-14 06:05:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:58,393 INFO L225 Difference]: With dead ends: 195 [2022-07-14 06:05:58,394 INFO L226 Difference]: Without dead ends: 181 [2022-07-14 06:05:58,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-07-14 06:05:58,395 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 101 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:58,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 298 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 220 Invalid, 0 Unknown, 185 Unchecked, 0.1s Time] [2022-07-14 06:05:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-14 06:05:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 149. [2022-07-14 06:05:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.1655172413793105) internal successors, (169), 148 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2022-07-14 06:05:58,398 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 27 [2022-07-14 06:05:58,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:58,398 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2022-07-14 06:05:58,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2022-07-14 06:05:58,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 06:05:58,399 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:58,399 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:58,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:58,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-14 06:05:58,603 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:05:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash 831251234, now seen corresponding path program 4 times [2022-07-14 06:05:58,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:58,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947251228] [2022-07-14 06:05:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:58,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:59,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:59,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947251228] [2022-07-14 06:05:59,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947251228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:59,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319851074] [2022-07-14 06:05:59,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:05:59,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:59,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:59,059 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) [2022-07-14 06:05:59,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-14 06:05:59,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:05:59,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:59,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-14 06:05:59,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:59,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:05:59,542 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 17 treesize of output 13 [2022-07-14 06:05:59,584 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 20 treesize of output 22 [2022-07-14 06:05:59,748 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-14 06:05:59,749 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 10 [2022-07-14 06:05:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:05:59,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:59,856 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_434) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)))) is different from false [2022-07-14 06:05:59,861 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:59,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-14 06:05:59,868 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:59,868 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 40 treesize of output 40 [2022-07-14 06:05:59,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:06:00,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:06:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:00,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319851074] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:00,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:00,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 34 [2022-07-14 06:06:00,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42567363] [2022-07-14 06:06:00,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:00,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-14 06:06:00,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:00,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-14 06:06:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=944, Unknown=1, NotChecked=62, Total=1122 [2022-07-14 06:06:00,072 INFO L87 Difference]: Start difference. First operand 149 states and 169 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:00,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:00,537 INFO L93 Difference]: Finished difference Result 191 states and 211 transitions. [2022-07-14 06:06:00,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:06:00,537 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-14 06:06:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:00,538 INFO L225 Difference]: With dead ends: 191 [2022-07-14 06:06:00,539 INFO L226 Difference]: Without dead ends: 167 [2022-07-14 06:06:00,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 4 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=1734, Unknown=1, NotChecked=86, Total=2070 [2022-07-14 06:06:00,540 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:00,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 440 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 305 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-07-14 06:06:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-14 06:06:00,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 148. [2022-07-14 06:06:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 147 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:00,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 166 transitions. [2022-07-14 06:06:00,543 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 166 transitions. Word has length 28 [2022-07-14 06:06:00,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:00,543 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 166 transitions. [2022-07-14 06:06:00,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:00,544 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 166 transitions. [2022-07-14 06:06:00,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 06:06:00,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:00,544 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:00,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:00,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-14 06:06:00,768 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:00,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:00,768 INFO L85 PathProgramCache]: Analyzing trace with hash 697237728, now seen corresponding path program 1 times [2022-07-14 06:06:00,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:00,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491049357] [2022-07-14 06:06:00,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:00,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:01,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:01,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491049357] [2022-07-14 06:06:01,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491049357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:01,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264480884] [2022-07-14 06:06:01,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:01,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:01,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:01,184 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) [2022-07-14 06:06:01,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-14 06:06:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:01,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-14 06:06:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:01,500 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 17 treesize of output 13 [2022-07-14 06:06:01,573 INFO L356 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2022-07-14 06:06:01,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-14 06:06:01,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:06:01,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:01,881 INFO L356 Elim1Store]: treesize reduction 40, result has 25.9 percent of original size [2022-07-14 06:06:01,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 27 [2022-07-14 06:06:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:01,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:02,773 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) is different from false [2022-07-14 06:06:02,785 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-14 06:06:02,785 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 113 treesize of output 103 [2022-07-14 06:06:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:03,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264480884] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:03,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:03,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-07-14 06:06:03,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517798272] [2022-07-14 06:06:03,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:03,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-14 06:06:03,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:03,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-14 06:06:03,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1050, Unknown=1, NotChecked=66, Total=1260 [2022-07-14 06:06:03,013 INFO L87 Difference]: Start difference. First operand 148 states and 166 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:04,498 WARN L833 $PredicateComparison]: unable to prove that (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (not (< |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~length2~0#1|))) (<= |c_ULTIMATE.start_main_~length2~0#1| 1) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~length1~0#1| 3) (<= 1 |c_ULTIMATE.start_main_~n~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 2) (exists ((|ULTIMATE.start_main_~length1~0#1| Int) (|ULTIMATE.start_main_~n~0#1| Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~length1~0#1| (* (- 1) |ULTIMATE.start_main_~n~0#1|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (not (< |ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~length1~0#1| 3))) (<= 1 |c_ULTIMATE.start_main_~length2~0#1|)) is different from false [2022-07-14 06:06:05,289 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse2 (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_main_~n~0#1| 2)) (.cse0 (= (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) (.cse3 (< 3 (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~length2~0#1|))) (.cse5 (<= 1 |c_ULTIMATE.start_main_~length2~0#1|))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (or .cse0 (= (select .cse1 1) 0) .cse2) (or .cse3 (<= 1 |c_ULTIMATE.start_main_~n~0#1|)) (or (= (+ (- 1) |c_ULTIMATE.start_main_~length1~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset| (* |c_ULTIMATE.start_main_~n~0#1| (- 1))) 1) (< (+ |c_ULTIMATE.start_main_~length1~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) .cse4) .cse2) (or (and (<= |c_ULTIMATE.start_main_~length2~0#1| 1) .cse5) (not .cse2)) (or (= .cse4 |c_ULTIMATE.start_main_~length1~0#1|) (= (+ |c_ULTIMATE.start_main_~n~0#1| 1) |c_ULTIMATE.start_main_~length1~0#1|)) (or .cse0 (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) (or .cse3 .cse5) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse6 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse6 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) .cse5))) is different from false [2022-07-14 06:06:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:05,548 INFO L93 Difference]: Finished difference Result 218 states and 237 transitions. [2022-07-14 06:06:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-14 06:06:05,548 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-14 06:06:05,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:05,549 INFO L225 Difference]: With dead ends: 218 [2022-07-14 06:06:05,549 INFO L226 Difference]: Without dead ends: 208 [2022-07-14 06:06:05,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=282, Invalid=1707, Unknown=3, NotChecked=264, Total=2256 [2022-07-14 06:06:05,550 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 186 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:05,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 565 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 370 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2022-07-14 06:06:05,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-14 06:06:05,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2022-07-14 06:06:05,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 151 states have (on average 1.1523178807947019) internal successors, (174), 154 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:05,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 174 transitions. [2022-07-14 06:06:05,554 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 174 transitions. Word has length 28 [2022-07-14 06:06:05,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:05,554 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 174 transitions. [2022-07-14 06:06:05,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:05,554 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 174 transitions. [2022-07-14 06:06:05,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 06:06:05,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:05,555 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:05,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:05,755 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,SelfDestructingSolverStorable28 [2022-07-14 06:06:05,755 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:05,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1853207525, now seen corresponding path program 5 times [2022-07-14 06:06:05,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:05,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468237924] [2022-07-14 06:06:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:05,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:05,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:05,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468237924] [2022-07-14 06:06:05,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468237924] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:05,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497240893] [2022-07-14 06:06:05,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:06:05,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:05,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:05,906 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) [2022-07-14 06:06:05,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-14 06:06:05,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-14 06:06:05,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:05,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-14 06:06:05,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:05,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:06:06,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:06:06,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:06:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:06,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:06,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497240893] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:06,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:06,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-07-14 06:06:06,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240449916] [2022-07-14 06:06:06,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:06,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-14 06:06:06,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:06,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-14 06:06:06,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:06:06,431 INFO L87 Difference]: Start difference. First operand 155 states and 174 transitions. Second operand has 27 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:06,861 INFO L93 Difference]: Finished difference Result 229 states and 253 transitions. [2022-07-14 06:06:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:06:06,861 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 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 32 [2022-07-14 06:06:06,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:06,862 INFO L225 Difference]: With dead ends: 229 [2022-07-14 06:06:06,862 INFO L226 Difference]: Without dead ends: 222 [2022-07-14 06:06:06,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:06:06,864 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 202 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:06,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 482 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:06:06,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-14 06:06:06,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 175. [2022-07-14 06:06:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 171 states have (on average 1.1461988304093567) internal successors, (196), 174 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 196 transitions. [2022-07-14 06:06:06,871 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 196 transitions. Word has length 32 [2022-07-14 06:06:06,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:06,871 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 196 transitions. [2022-07-14 06:06:06,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:06,872 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 196 transitions. [2022-07-14 06:06:06,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-14 06:06:06,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:06,872 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:06,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:07,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:07,096 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:07,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:07,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1478995618, now seen corresponding path program 6 times [2022-07-14 06:06:07,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:07,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244796003] [2022-07-14 06:06:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:07,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:07,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:07,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244796003] [2022-07-14 06:06:07,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244796003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:07,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050724450] [2022-07-14 06:06:07,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:06:07,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:07,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:07,702 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) [2022-07-14 06:06:07,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-14 06:06:07,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-14 06:06:07,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:07,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-14 06:06:07,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:08,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:06:08,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:06:08,382 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 22 treesize of output 21 [2022-07-14 06:06:08,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:06:08,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:08,724 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 06:06:08,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2022-07-14 06:06:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:08,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:10,931 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= 0 (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) is different from false [2022-07-14 06:06:10,939 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-14 06:06:10,939 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 113 treesize of output 103 [2022-07-14 06:06:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:11,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050724450] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:11,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:11,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 47 [2022-07-14 06:06:11,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513763806] [2022-07-14 06:06:11,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:11,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-14 06:06:11,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:11,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-14 06:06:11,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1900, Unknown=1, NotChecked=88, Total=2162 [2022-07-14 06:06:11,324 INFO L87 Difference]: Start difference. First operand 175 states and 196 transitions. Second operand has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 47 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:13,429 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) (.cse1 (+ (- 1) |c_ULTIMATE.start_main_~length1~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset| (* |c_ULTIMATE.start_main_~n~0#1| (- 1)))) (.cse2 (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (or (= .cse0 .cse1) .cse2) (= |c_ULTIMATE.start_main_~n~0#1| 1) (< 3 |c_ULTIMATE.start_main_~length1~0#1|) (<= |c_ULTIMATE.start_main_~length1~0#1| 4) (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) .cse0) 0) .cse2) (or (and (or (<= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~i~0#1| 1)) (<= 1 |c_ULTIMATE.start_main_~n~0#1|)) (or (<= |c_ULTIMATE.start_main_~n~0#1| 1) (not (<= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~i~0#1|)))) (or (and (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 2)) (not (= (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) .cse1)))) .cse2) (= |c_ULTIMATE.start_main_~length2~0#1| 1) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (or (not .cse2) (<= (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) 1)) (exists ((|ULTIMATE.start_main_~length1~0#1| Int)) (and (<= |ULTIMATE.start_main_~length1~0#1| 4) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |ULTIMATE.start_main_~length1~0#1| (- 2) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (< 3 |ULTIMATE.start_main_~length1~0#1|))) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse3 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= 0 (select .cse3 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))))) is different from false [2022-07-14 06:06:15,443 WARN L833 $PredicateComparison]: unable to prove that (and (or (= (+ |c_ULTIMATE.start_main_~n~0#1| 3) |c_ULTIMATE.start_main_~length1~0#1|) (= (+ |c_ULTIMATE.start_main_~n~0#1| 1) |c_ULTIMATE.start_main_~length1~0#1|)) (<= |c_ULTIMATE.start_main_~n~0#1| 3) (or (<= 3 |c_ULTIMATE.start_main_~n~0#1|) (<= |c_ULTIMATE.start_main_~n~0#1| 1)) (<= 1 |c_ULTIMATE.start_main_~n~0#1|) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= 0 (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))))) is different from false [2022-07-14 06:06:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:15,692 INFO L93 Difference]: Finished difference Result 247 states and 267 transitions. [2022-07-14 06:06:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-14 06:06:15,692 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 47 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-14 06:06:15,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:15,693 INFO L225 Difference]: With dead ends: 247 [2022-07-14 06:06:15,693 INFO L226 Difference]: Without dead ends: 220 [2022-07-14 06:06:15,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=379, Invalid=3662, Unknown=3, NotChecked=378, Total=4422 [2022-07-14 06:06:15,694 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 160 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:15,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1124 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 769 Invalid, 0 Unknown, 198 Unchecked, 0.4s Time] [2022-07-14 06:06:15,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-14 06:06:15,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 184. [2022-07-14 06:06:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 180 states have (on average 1.1388888888888888) internal successors, (205), 183 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 205 transitions. [2022-07-14 06:06:15,697 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 205 transitions. Word has length 34 [2022-07-14 06:06:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:15,698 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 205 transitions. [2022-07-14 06:06:15,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 47 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 205 transitions. [2022-07-14 06:06:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-14 06:06:15,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:15,698 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:15,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:15,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:15,915 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:15,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:15,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1456363364, now seen corresponding path program 2 times [2022-07-14 06:06:15,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:15,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497028884] [2022-07-14 06:06:15,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:15,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:16,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:16,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497028884] [2022-07-14 06:06:16,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497028884] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:16,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147973546] [2022-07-14 06:06:16,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:06:16,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:16,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:16,857 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:16,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-14 06:06:16,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:06:16,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:16,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-14 06:06:16,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:17,304 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 17 treesize of output 13 [2022-07-14 06:06:17,382 INFO L356 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2022-07-14 06:06:17,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-14 06:06:17,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:06:17,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:06:17,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:17,842 INFO L356 Elim1Store]: treesize reduction 47, result has 29.9 percent of original size [2022-07-14 06:06:17,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 37 [2022-07-14 06:06:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:17,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:18,074 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 53 treesize of output 47 [2022-07-14 06:06:18,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:18,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:18,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:18,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 78 [2022-07-14 06:06:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:18,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147973546] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:18,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:18,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 44 [2022-07-14 06:06:18,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943545571] [2022-07-14 06:06:18,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:18,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-14 06:06:18,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:18,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-14 06:06:18,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2022-07-14 06:06:18,405 INFO L87 Difference]: Start difference. First operand 184 states and 205 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:22,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:22,584 INFO L93 Difference]: Finished difference Result 307 states and 333 transitions. [2022-07-14 06:06:22,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-14 06:06:22,584 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-14 06:06:22,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:22,585 INFO L225 Difference]: With dead ends: 307 [2022-07-14 06:06:22,585 INFO L226 Difference]: Without dead ends: 295 [2022-07-14 06:06:22,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=835, Invalid=4277, Unknown=0, NotChecked=0, Total=5112 [2022-07-14 06:06:22,587 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 357 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:22,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 583 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 736 Invalid, 0 Unknown, 138 Unchecked, 0.4s Time] [2022-07-14 06:06:22,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-14 06:06:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 198. [2022-07-14 06:06:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 194 states have (on average 1.1443298969072164) internal successors, (222), 197 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:22,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 222 transitions. [2022-07-14 06:06:22,591 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 222 transitions. Word has length 34 [2022-07-14 06:06:22,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:22,591 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 222 transitions. [2022-07-14 06:06:22,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:22,592 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 222 transitions. [2022-07-14 06:06:22,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-14 06:06:22,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:22,592 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:22,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-14 06:06:22,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:22,807 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:22,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:22,808 INFO L85 PathProgramCache]: Analyzing trace with hash 423361944, now seen corresponding path program 2 times [2022-07-14 06:06:22,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:22,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579355919] [2022-07-14 06:06:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:22,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:06:22,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:22,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579355919] [2022-07-14 06:06:22,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579355919] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:22,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548531827] [2022-07-14 06:06:22,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:06:22,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:22,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:22,912 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:22,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-14 06:06:23,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:06:23,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:23,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-14 06:06:23,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:23,052 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:06:23,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:06:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:06:23,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:06:23,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548531827] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:23,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:23,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-07-14 06:06:23,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26191752] [2022-07-14 06:06:23,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:23,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-14 06:06:23,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:23,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-14 06:06:23,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:06:23,279 INFO L87 Difference]: Start difference. First operand 198 states and 222 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:23,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:23,533 INFO L93 Difference]: Finished difference Result 291 states and 322 transitions. [2022-07-14 06:06:23,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:06:23,534 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-14 06:06:23,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:23,535 INFO L225 Difference]: With dead ends: 291 [2022-07-14 06:06:23,535 INFO L226 Difference]: Without dead ends: 251 [2022-07-14 06:06:23,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2022-07-14 06:06:23,536 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 175 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:23,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 241 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:06:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-07-14 06:06:23,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 200. [2022-07-14 06:06:23,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 196 states have (on average 1.1428571428571428) internal successors, (224), 199 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 224 transitions. [2022-07-14 06:06:23,539 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 224 transitions. Word has length 37 [2022-07-14 06:06:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:23,539 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 224 transitions. [2022-07-14 06:06:23,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:23,539 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 224 transitions. [2022-07-14 06:06:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-14 06:06:23,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:23,540 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:23,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:23,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:23,741 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:23,742 INFO L85 PathProgramCache]: Analyzing trace with hash 763708385, now seen corresponding path program 7 times [2022-07-14 06:06:23,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:23,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094291904] [2022-07-14 06:06:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:23,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:23,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:23,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094291904] [2022-07-14 06:06:23,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094291904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:23,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902016853] [2022-07-14 06:06:23,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:06:23,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:23,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:23,910 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:23,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-14 06:06:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:23,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-14 06:06:23,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:23,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:06:23,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:06:23,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:06:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:24,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:24,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902016853] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:24,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:24,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2022-07-14 06:06:24,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569308949] [2022-07-14 06:06:24,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:24,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-14 06:06:24,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:24,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-14 06:06:24,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2022-07-14 06:06:24,553 INFO L87 Difference]: Start difference. First operand 200 states and 224 transitions. Second operand has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 36 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:25,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:25,359 INFO L93 Difference]: Finished difference Result 326 states and 357 transitions. [2022-07-14 06:06:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:06:25,360 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 36 states have internal predecessors, (104), 0 states have call successors, (0), 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 38 [2022-07-14 06:06:25,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:25,361 INFO L225 Difference]: With dead ends: 326 [2022-07-14 06:06:25,361 INFO L226 Difference]: Without dead ends: 319 [2022-07-14 06:06:25,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=1975, Unknown=0, NotChecked=0, Total=2450 [2022-07-14 06:06:25,362 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 512 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:25,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 792 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:06:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-07-14 06:06:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 220. [2022-07-14 06:06:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 216 states have (on average 1.1388888888888888) internal successors, (246), 219 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 246 transitions. [2022-07-14 06:06:25,366 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 246 transitions. Word has length 38 [2022-07-14 06:06:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:25,366 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 246 transitions. [2022-07-14 06:06:25,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 36 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:25,367 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 246 transitions. [2022-07-14 06:06:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-14 06:06:25,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:25,368 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:25,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-14 06:06:25,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:25,583 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:25,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:25,584 INFO L85 PathProgramCache]: Analyzing trace with hash -515648934, now seen corresponding path program 8 times [2022-07-14 06:06:25,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:25,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402091789] [2022-07-14 06:06:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:25,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:25,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:25,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402091789] [2022-07-14 06:06:25,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402091789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:25,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383525970] [2022-07-14 06:06:25,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:06:25,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:25,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:25,850 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:25,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-14 06:06:25,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:06:25,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:25,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-14 06:06:25,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:25,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:06:26,194 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 17 treesize of output 13 [2022-07-14 06:06:26,233 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 20 treesize of output 22 [2022-07-14 06:06:26,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:06:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:26,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:26,430 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_677) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:06:26,438 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:26,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-14 06:06:26,443 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:26,443 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 40 treesize of output 40 [2022-07-14 06:06:26,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:06:26,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:06:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:26,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383525970] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:26,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:26,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 39 [2022-07-14 06:06:26,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160985721] [2022-07-14 06:06:26,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:26,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-14 06:06:26,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:26,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-14 06:06:26,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1278, Unknown=1, NotChecked=72, Total=1482 [2022-07-14 06:06:26,728 INFO L87 Difference]: Start difference. First operand 220 states and 246 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:27,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:27,344 INFO L93 Difference]: Finished difference Result 289 states and 317 transitions. [2022-07-14 06:06:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:06:27,345 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-14 06:06:27,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:27,346 INFO L225 Difference]: With dead ends: 289 [2022-07-14 06:06:27,346 INFO L226 Difference]: Without dead ends: 258 [2022-07-14 06:06:27,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=226, Invalid=2033, Unknown=1, NotChecked=92, Total=2352 [2022-07-14 06:06:27,347 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 88 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:27,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 656 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 559 Invalid, 0 Unknown, 146 Unchecked, 0.3s Time] [2022-07-14 06:06:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-14 06:06:27,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 229. [2022-07-14 06:06:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 225 states have (on average 1.1333333333333333) internal successors, (255), 228 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 255 transitions. [2022-07-14 06:06:27,351 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 255 transitions. Word has length 40 [2022-07-14 06:06:27,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:27,351 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 255 transitions. [2022-07-14 06:06:27,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:27,351 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 255 transitions. [2022-07-14 06:06:27,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-14 06:06:27,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:27,352 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:27,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:27,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:27,553 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:27,553 INFO L85 PathProgramCache]: Analyzing trace with hash -910015720, now seen corresponding path program 3 times [2022-07-14 06:06:27,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:27,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206866521] [2022-07-14 06:06:27,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:27,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:27,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:27,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206866521] [2022-07-14 06:06:27,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206866521] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:27,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565606441] [2022-07-14 06:06:27,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:06:27,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:27,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:27,992 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:27,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-14 06:06:28,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-14 06:06:28,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:28,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-14 06:06:28,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:28,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:06:28,374 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 17 treesize of output 13 [2022-07-14 06:06:28,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-14 06:06:29,377 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:29,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 19 [2022-07-14 06:06:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:29,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:29,525 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_716 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_716) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= 0 (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) is different from false [2022-07-14 06:06:29,530 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:29,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 61 [2022-07-14 06:06:29,563 INFO L356 Elim1Store]: treesize reduction 88, result has 31.8 percent of original size [2022-07-14 06:06:29,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 111 treesize of output 119 [2022-07-14 06:06:29,578 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-14 06:06:29,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 29 [2022-07-14 06:06:30,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:06:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:30,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565606441] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:30,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:30,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 47 [2022-07-14 06:06:30,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952602366] [2022-07-14 06:06:30,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:30,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-14 06:06:30,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:30,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-14 06:06:30,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1865, Unknown=2, NotChecked=88, Total=2162 [2022-07-14 06:06:30,215 INFO L87 Difference]: Start difference. First operand 229 states and 255 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:32,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:32,330 INFO L93 Difference]: Finished difference Result 334 states and 366 transitions. [2022-07-14 06:06:32,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-14 06:06:32,331 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-14 06:06:32,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:32,332 INFO L225 Difference]: With dead ends: 334 [2022-07-14 06:06:32,332 INFO L226 Difference]: Without dead ends: 308 [2022-07-14 06:06:32,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=481, Invalid=3553, Unknown=2, NotChecked=124, Total=4160 [2022-07-14 06:06:32,334 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 258 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:32,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 508 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 874 Invalid, 0 Unknown, 66 Unchecked, 0.4s Time] [2022-07-14 06:06:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-07-14 06:06:32,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 244. [2022-07-14 06:06:32,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 240 states have (on average 1.1375) internal successors, (273), 243 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:32,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 273 transitions. [2022-07-14 06:06:32,338 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 273 transitions. Word has length 40 [2022-07-14 06:06:32,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:32,338 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 273 transitions. [2022-07-14 06:06:32,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:32,339 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 273 transitions. [2022-07-14 06:06:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-14 06:06:32,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:32,339 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:32,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:32,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-14 06:06:32,563 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:32,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2063863029, now seen corresponding path program 1 times [2022-07-14 06:06:32,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:32,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324949440] [2022-07-14 06:06:32,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:32,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:06:32,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:32,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324949440] [2022-07-14 06:06:32,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324949440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:32,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522932711] [2022-07-14 06:06:32,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:32,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:32,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:32,705 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:32,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-14 06:06:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:32,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-14 06:06:32,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:32,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:06:32,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:06:33,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:06:33,153 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-14 06:06:33,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-14 06:06:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:33,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:33,210 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-07-14 06:06:33,215 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_758 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)))) is different from false [2022-07-14 06:06:33,225 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_758) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ |c_ULTIMATE.start_cstrncat_~src#1.offset| 1)) 0)) is different from false [2022-07-14 06:06:33,228 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_758 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_758) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0)) is different from false [2022-07-14 06:06:33,232 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:33,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:06:33,236 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:33,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:06:33,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:06:33,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:06:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-07-14 06:06:33,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522932711] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:33,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:33,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 36 [2022-07-14 06:06:33,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793776264] [2022-07-14 06:06:33,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:33,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-14 06:06:33,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:33,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-14 06:06:33,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=883, Unknown=4, NotChecked=252, Total=1260 [2022-07-14 06:06:33,459 INFO L87 Difference]: Start difference. First operand 244 states and 273 transitions. Second operand has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:34,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:34,570 INFO L93 Difference]: Finished difference Result 295 states and 326 transitions. [2022-07-14 06:06:34,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-14 06:06:34,570 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-14 06:06:34,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:34,571 INFO L225 Difference]: With dead ends: 295 [2022-07-14 06:06:34,571 INFO L226 Difference]: Without dead ends: 289 [2022-07-14 06:06:34,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=667, Invalid=3767, Unknown=4, NotChecked=532, Total=4970 [2022-07-14 06:06:34,572 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 288 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 461 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:34,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 410 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 346 Invalid, 0 Unknown, 461 Unchecked, 0.2s Time] [2022-07-14 06:06:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-14 06:06:34,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 246. [2022-07-14 06:06:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 242 states have (on average 1.1363636363636365) internal successors, (275), 245 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 275 transitions. [2022-07-14 06:06:34,577 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 275 transitions. Word has length 41 [2022-07-14 06:06:34,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:34,577 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 275 transitions. [2022-07-14 06:06:34,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:34,577 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 275 transitions. [2022-07-14 06:06:34,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-14 06:06:34,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:34,578 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:34,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-14 06:06:34,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-14 06:06:34,791 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:34,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:34,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1091941255, now seen corresponding path program 1 times [2022-07-14 06:06:34,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:34,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496562351] [2022-07-14 06:06:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:34,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:06:34,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:34,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496562351] [2022-07-14 06:06:34,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496562351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:34,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836143896] [2022-07-14 06:06:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:34,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:34,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:34,936 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:34,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-14 06:06:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:35,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-14 06:06:35,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:35,045 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:06:35,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:06:35,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:06:35,381 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:06:35,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-07-14 06:06:35,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2022-07-14 06:06:35,575 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-14 06:06:35,576 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 22 treesize of output 14 [2022-07-14 06:06:35,614 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:06:35,614 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 [2022-07-14 06:06:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:35,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:35,939 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:35,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:06:35,944 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:35,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:06:35,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:06:38,384 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 98 treesize of output 94 [2022-07-14 06:06:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:38,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836143896] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:38,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:38,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 46 [2022-07-14 06:06:38,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662328052] [2022-07-14 06:06:38,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:38,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-14 06:06:38,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:38,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-14 06:06:38,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1890, Unknown=14, NotChecked=0, Total=2070 [2022-07-14 06:06:38,436 INFO L87 Difference]: Start difference. First operand 246 states and 275 transitions. Second operand has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:39,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:39,213 INFO L93 Difference]: Finished difference Result 328 states and 359 transitions. [2022-07-14 06:06:39,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-14 06:06:39,213 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-14 06:06:39,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:39,214 INFO L225 Difference]: With dead ends: 328 [2022-07-14 06:06:39,214 INFO L226 Difference]: Without dead ends: 304 [2022-07-14 06:06:39,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=417, Invalid=4399, Unknown=14, NotChecked=0, Total=4830 [2022-07-14 06:06:39,216 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 175 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:39,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 378 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 252 Invalid, 0 Unknown, 337 Unchecked, 0.1s Time] [2022-07-14 06:06:39,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-14 06:06:39,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 234. [2022-07-14 06:06:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 230 states have (on average 1.1391304347826088) internal successors, (262), 233 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 262 transitions. [2022-07-14 06:06:39,220 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 262 transitions. Word has length 42 [2022-07-14 06:06:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:39,220 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 262 transitions. [2022-07-14 06:06:39,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 262 transitions. [2022-07-14 06:06:39,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-14 06:06:39,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:39,221 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:39,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-14 06:06:39,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-14 06:06:39,431 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:39,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:39,432 INFO L85 PathProgramCache]: Analyzing trace with hash 734238365, now seen corresponding path program 9 times [2022-07-14 06:06:39,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:39,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040223166] [2022-07-14 06:06:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:39,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:39,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:39,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040223166] [2022-07-14 06:06:39,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040223166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:39,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262136909] [2022-07-14 06:06:39,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:06:39,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:39,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:39,636 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:39,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-14 06:06:39,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-14 06:06:39,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:39,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-14 06:06:39,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:39,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:06:39,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:06:39,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:06:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:40,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 45 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:40,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262136909] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:40,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:40,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2022-07-14 06:06:40,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28772200] [2022-07-14 06:06:40,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:40,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-14 06:06:40,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:40,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-14 06:06:40,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1634, Unknown=0, NotChecked=0, Total=1892 [2022-07-14 06:06:40,466 INFO L87 Difference]: Start difference. First operand 234 states and 262 transitions. Second operand has 44 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 44 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:41,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:41,128 INFO L93 Difference]: Finished difference Result 391 states and 428 transitions. [2022-07-14 06:06:41,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-14 06:06:41,129 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 44 states have internal predecessors, (122), 0 states have call successors, (0), 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 44 [2022-07-14 06:06:41,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:41,130 INFO L225 Difference]: With dead ends: 391 [2022-07-14 06:06:41,130 INFO L226 Difference]: Without dead ends: 384 [2022-07-14 06:06:41,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=614, Invalid=2466, Unknown=0, NotChecked=0, Total=3080 [2022-07-14 06:06:41,131 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 722 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:41,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 555 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:06:41,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-07-14 06:06:41,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 254. [2022-07-14 06:06:41,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 250 states have (on average 1.136) internal successors, (284), 253 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 284 transitions. [2022-07-14 06:06:41,136 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 284 transitions. Word has length 44 [2022-07-14 06:06:41,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:41,137 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 284 transitions. [2022-07-14 06:06:41,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 44 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 284 transitions. [2022-07-14 06:06:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-14 06:06:41,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:41,138 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-14 06:06:41,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:41,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:41,362 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:41,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:41,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1097682670, now seen corresponding path program 2 times [2022-07-14 06:06:41,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:41,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602920949] [2022-07-14 06:06:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:41,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:41,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:41,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602920949] [2022-07-14 06:06:41,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602920949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:41,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000150202] [2022-07-14 06:06:41,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:06:41,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:41,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:41,550 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:41,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-14 06:06:41,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:06:41,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:41,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-14 06:06:41,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:41,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:06:41,953 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-07-14 06:06:41,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2022-07-14 06:06:41,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:06:41,974 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2022-07-14 06:06:42,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:42,126 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:42,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2022-07-14 06:06:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:06:42,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:42,214 WARN L833 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_cstrncat_#t~mem6#1| 0) (forall ((v_ArrVal_888 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0))) is different from false [2022-07-14 06:06:42,218 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_#t~post5#1.base|) |c_ULTIMATE.start_cstrncat_#t~post5#1.offset|) 0) (forall ((v_ArrVal_888 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0))) is different from false [2022-07-14 06:06:42,223 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_888 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-07-14 06:06:42,260 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0) (forall ((v_ArrVal_888 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~d~0#1.offset|) 0)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)))) is different from false [2022-07-14 06:06:42,266 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~src#1.base|) |c_ULTIMATE.start_cstrncat_~src#1.offset|) 0) (forall ((v_ArrVal_888 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ |c_ULTIMATE.start_cstrncat_~src#1.offset| 1)) 0) (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~dst#1.offset|) 0))))) is different from false [2022-07-14 06:06:42,273 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_888 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) is different from false [2022-07-14 06:06:42,294 INFO L356 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2022-07-14 06:06:42,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 85 [2022-07-14 06:06:42,303 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:42,303 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 49 treesize of output 51 [2022-07-14 06:06:42,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:06:42,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:42,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-07-14 06:06:42,352 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:42,353 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 66 treesize of output 70 [2022-07-14 06:06:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 3 not checked. [2022-07-14 06:06:42,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000150202] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:42,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:42,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 46 [2022-07-14 06:06:42,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184236634] [2022-07-14 06:06:42,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:42,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-14 06:06:42,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:42,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-14 06:06:42,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1431, Unknown=6, NotChecked=486, Total=2070 [2022-07-14 06:06:42,575 INFO L87 Difference]: Start difference. First operand 254 states and 284 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:44,273 WARN L833 $PredicateComparison]: unable to prove that (and (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~src#1.base|) |c_ULTIMATE.start_cstrncat_~src#1.offset|) 0) (forall ((v_ArrVal_888 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ |c_ULTIMATE.start_cstrncat_~src#1.offset| 1)) 0) (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~dst#1.offset|) 0))))) (exists ((|ULTIMATE.start_main_~length2~0#1| Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ (- 1) |ULTIMATE.start_main_~length2~0#1|)) 0) (< 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length2~0#1| 2))) (= |c_ULTIMATE.start_cstrncat_~dst#1.offset| 0) (= |c_ULTIMATE.start_cstrncat_~src#1.offset| 0)) is different from false [2022-07-14 06:06:44,376 WARN L833 $PredicateComparison]: unable to prove that (and (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0) (forall ((v_ArrVal_888 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~d~0#1.offset|) 0)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_888) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)))) (= |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 0) (= |c_ULTIMATE.start_cstrncat_~d~0#1.offset| 0) (exists ((|ULTIMATE.start_main_~length2~0#1| Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~length2~0#1|)) 0) (< 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length2~0#1| 2)))) is different from false [2022-07-14 06:06:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:44,755 INFO L93 Difference]: Finished difference Result 390 states and 426 transitions. [2022-07-14 06:06:44,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-14 06:06:44,755 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-14 06:06:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:44,756 INFO L225 Difference]: With dead ends: 390 [2022-07-14 06:06:44,756 INFO L226 Difference]: Without dead ends: 348 [2022-07-14 06:06:44,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 3078 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1097, Invalid=9637, Unknown=10, NotChecked=1688, Total=12432 [2022-07-14 06:06:44,758 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 397 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 768 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:44,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 413 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 375 Invalid, 0 Unknown, 768 Unchecked, 0.2s Time] [2022-07-14 06:06:44,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-14 06:06:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 276. [2022-07-14 06:06:44,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 272 states have (on average 1.1323529411764706) internal successors, (308), 275 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 308 transitions. [2022-07-14 06:06:44,762 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 308 transitions. Word has length 45 [2022-07-14 06:06:44,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:44,762 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 308 transitions. [2022-07-14 06:06:44,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:44,762 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 308 transitions. [2022-07-14 06:06:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:06:44,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:44,763 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:44,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:44,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-14 06:06:44,979 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:44,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:44,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1228432918, now seen corresponding path program 10 times [2022-07-14 06:06:44,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:44,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45642009] [2022-07-14 06:06:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:44,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:45,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:45,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45642009] [2022-07-14 06:06:45,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45642009] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:45,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535797780] [2022-07-14 06:06:45,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:06:45,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:45,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:45,348 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:45,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-14 06:06:45,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:06:45,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:45,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-14 06:06:45,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:45,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:06:45,766 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 17 treesize of output 13 [2022-07-14 06:06:45,800 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 20 treesize of output 22 [2022-07-14 06:06:45,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:06:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:45,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:46,008 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_931 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_931) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:06:46,012 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:46,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-14 06:06:46,017 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:46,017 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 40 treesize of output 40 [2022-07-14 06:06:46,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:06:46,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:06:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:46,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535797780] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:46,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:46,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 43 [2022-07-14 06:06:46,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433527940] [2022-07-14 06:06:46,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:46,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-14 06:06:46,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:46,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-14 06:06:46,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1581, Unknown=1, NotChecked=80, Total=1806 [2022-07-14 06:06:46,297 INFO L87 Difference]: Start difference. First operand 276 states and 308 transitions. Second operand has 43 states, 43 states have (on average 2.4651162790697674) internal successors, (106), 43 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:47,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:47,316 INFO L93 Difference]: Finished difference Result 392 states and 427 transitions. [2022-07-14 06:06:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 06:06:47,316 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.4651162790697674) internal successors, (106), 43 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-14 06:06:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:47,317 INFO L225 Difference]: With dead ends: 392 [2022-07-14 06:06:47,317 INFO L226 Difference]: Without dead ends: 357 [2022-07-14 06:06:47,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=371, Invalid=3054, Unknown=1, NotChecked=114, Total=3540 [2022-07-14 06:06:47,318 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 165 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:47,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 978 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 745 Invalid, 0 Unknown, 239 Unchecked, 0.3s Time] [2022-07-14 06:06:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-07-14 06:06:47,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 285. [2022-07-14 06:06:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 281 states have (on average 1.1281138790035588) internal successors, (317), 284 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 317 transitions. [2022-07-14 06:06:47,322 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 317 transitions. Word has length 46 [2022-07-14 06:06:47,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:47,323 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 317 transitions. [2022-07-14 06:06:47,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.4651162790697674) internal successors, (106), 43 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 317 transitions. [2022-07-14 06:06:47,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:06:47,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:47,324 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:47,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:47,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-07-14 06:06:47,543 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:47,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1476579412, now seen corresponding path program 4 times [2022-07-14 06:06:47,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:47,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51774622] [2022-07-14 06:06:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:47,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:48,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:48,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51774622] [2022-07-14 06:06:48,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51774622] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:48,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045262820] [2022-07-14 06:06:48,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:06:48,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:48,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:48,329 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:48,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-14 06:06:48,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:06:48,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:48,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-14 06:06:48,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:48,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:06:48,782 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 17 treesize of output 13 [2022-07-14 06:06:48,830 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 20 treesize of output 22 [2022-07-14 06:06:48,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:06:49,279 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:49,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 23 [2022-07-14 06:06:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:49,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:49,410 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 6 treesize of output 4 [2022-07-14 06:06:49,603 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:49,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 73 [2022-07-14 06:06:49,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,624 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:49,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 176 [2022-07-14 06:06:49,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:49,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 36 [2022-07-14 06:06:50,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:06:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:06:50,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045262820] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:50,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:50,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 57 [2022-07-14 06:06:50,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329072825] [2022-07-14 06:06:50,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:50,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-14 06:06:50,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:50,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-14 06:06:50,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2917, Unknown=1, NotChecked=0, Total=3192 [2022-07-14 06:06:50,636 INFO L87 Difference]: Start difference. First operand 285 states and 317 transitions. Second operand has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:53,268 INFO L93 Difference]: Finished difference Result 416 states and 456 transitions. [2022-07-14 06:06:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-14 06:06:53,268 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-14 06:06:53,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:53,269 INFO L225 Difference]: With dead ends: 416 [2022-07-14 06:06:53,269 INFO L226 Difference]: Without dead ends: 386 [2022-07-14 06:06:53,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2199 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=784, Invalid=7404, Unknown=2, NotChecked=0, Total=8190 [2022-07-14 06:06:53,271 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 279 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:53,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 647 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1137 Invalid, 0 Unknown, 106 Unchecked, 0.6s Time] [2022-07-14 06:06:53,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-07-14 06:06:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 310. [2022-07-14 06:06:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 306 states have (on average 1.130718954248366) internal successors, (346), 309 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 346 transitions. [2022-07-14 06:06:53,275 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 346 transitions. Word has length 46 [2022-07-14 06:06:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:53,275 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 346 transitions. [2022-07-14 06:06:53,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 346 transitions. [2022-07-14 06:06:53,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-14 06:06:53,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:53,277 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-14 06:06:53,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-14 06:06:53,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-14 06:06:53,479 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:53,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:53,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1193977735, now seen corresponding path program 1 times [2022-07-14 06:06:53,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:53,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807511487] [2022-07-14 06:06:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:53,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:06:53,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:53,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807511487] [2022-07-14 06:06:53,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807511487] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:53,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044673130] [2022-07-14 06:06:53,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:53,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:53,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:53,662 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:53,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-14 06:06:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:53,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-14 06:06:53,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:53,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:06:54,127 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:06:54,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-07-14 06:06:54,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2022-07-14 06:06:54,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:54,408 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:54,408 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 24 treesize of output 14 [2022-07-14 06:06:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:06:54,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:54,869 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:54,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:06:54,874 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:54,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:06:54,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:06:55,107 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-14 06:06:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:06:55,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044673130] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:55,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:55,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 51 [2022-07-14 06:06:55,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078034882] [2022-07-14 06:06:55,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:55,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-14 06:06:55,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:55,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-14 06:06:55,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2374, Unknown=1, NotChecked=0, Total=2550 [2022-07-14 06:06:55,232 INFO L87 Difference]: Start difference. First operand 310 states and 346 transitions. Second operand has 51 states, 51 states have (on average 2.5294117647058822) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:57,145 INFO L93 Difference]: Finished difference Result 579 states and 633 transitions. [2022-07-14 06:06:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-14 06:06:57,145 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.5294117647058822) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-14 06:06:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:57,147 INFO L225 Difference]: With dead ends: 579 [2022-07-14 06:06:57,147 INFO L226 Difference]: Without dead ends: 555 [2022-07-14 06:06:57,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2406 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=970, Invalid=8731, Unknown=1, NotChecked=0, Total=9702 [2022-07-14 06:06:57,151 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 549 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 589 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:57,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 419 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 601 Invalid, 0 Unknown, 589 Unchecked, 0.3s Time] [2022-07-14 06:06:57,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-07-14 06:06:57,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 372. [2022-07-14 06:06:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 368 states have (on average 1.138586956521739) internal successors, (419), 371 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 419 transitions. [2022-07-14 06:06:57,158 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 419 transitions. Word has length 47 [2022-07-14 06:06:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:57,164 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 419 transitions. [2022-07-14 06:06:57,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.5294117647058822) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 419 transitions. [2022-07-14 06:06:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 06:06:57,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:57,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-14 06:06:57,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-14 06:06:57,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:57,389 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:57,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:57,390 INFO L85 PathProgramCache]: Analyzing trace with hash 994210165, now seen corresponding path program 2 times [2022-07-14 06:06:57,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:57,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435260638] [2022-07-14 06:06:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:57,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-14 06:06:57,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:57,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435260638] [2022-07-14 06:06:57,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435260638] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:57,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834717067] [2022-07-14 06:06:57,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:06:57,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:57,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:57,648 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:57,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-14 06:06:57,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:06:57,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:57,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-14 06:06:57,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:57,766 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:06:57,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:06:57,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:06:57,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:06:58,105 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 16 treesize of output 18 [2022-07-14 06:06:58,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:58,204 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 [2022-07-14 06:06:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-14 06:06:58,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:58,536 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:58,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-14 06:06:58,542 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:58,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-14 06:06:58,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-14 06:06:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-14 06:06:58,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834717067] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:58,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:58,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2022-07-14 06:06:58,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922390981] [2022-07-14 06:06:58,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:58,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-14 06:06:58,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:58,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-14 06:06:58,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1172, Unknown=38, NotChecked=0, Total=1332 [2022-07-14 06:06:58,910 INFO L87 Difference]: Start difference. First operand 372 states and 419 transitions. Second operand has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:59,470 INFO L93 Difference]: Finished difference Result 482 states and 529 transitions. [2022-07-14 06:06:59,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 06:06:59,471 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-14 06:06:59,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:59,472 INFO L225 Difference]: With dead ends: 482 [2022-07-14 06:06:59,472 INFO L226 Difference]: Without dead ends: 402 [2022-07-14 06:06:59,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=316, Invalid=2295, Unknown=41, NotChecked=0, Total=2652 [2022-07-14 06:06:59,472 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:59,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 422 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 220 Invalid, 0 Unknown, 177 Unchecked, 0.1s Time] [2022-07-14 06:06:59,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-14 06:06:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 332. [2022-07-14 06:06:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 328 states have (on average 1.125) internal successors, (369), 331 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 369 transitions. [2022-07-14 06:06:59,477 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 369 transitions. Word has length 48 [2022-07-14 06:06:59,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:59,477 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 369 transitions. [2022-07-14 06:06:59,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 369 transitions. [2022-07-14 06:06:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:06:59,478 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:59,478 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:59,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:59,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:59,687 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:06:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:59,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1776899047, now seen corresponding path program 11 times [2022-07-14 06:06:59,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:59,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786300699] [2022-07-14 06:06:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:59,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:59,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:59,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786300699] [2022-07-14 06:06:59,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786300699] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:59,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873095139] [2022-07-14 06:06:59,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:06:59,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:59,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:59,912 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:59,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-14 06:07:00,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-14 06:07:00,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:00,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-14 06:07:00,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:00,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:00,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:07:00,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:07:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:00,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 66 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:00,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873095139] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:00,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:00,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-07-14 06:07:00,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071111506] [2022-07-14 06:07:00,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:00,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-14 06:07:00,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:00,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-14 06:07:00,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1640, Unknown=0, NotChecked=0, Total=1892 [2022-07-14 06:07:00,874 INFO L87 Difference]: Start difference. First operand 332 states and 369 transitions. Second operand has 44 states, 43 states have (on average 3.0) internal successors, (129), 44 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:01,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:01,728 INFO L93 Difference]: Finished difference Result 544 states and 593 transitions. [2022-07-14 06:07:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:07:01,729 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.0) internal successors, (129), 44 states have internal predecessors, (129), 0 states have call successors, (0), 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 50 [2022-07-14 06:07:01,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:01,730 INFO L225 Difference]: With dead ends: 544 [2022-07-14 06:07:01,730 INFO L226 Difference]: Without dead ends: 528 [2022-07-14 06:07:01,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=687, Invalid=2735, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 06:07:01,730 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 508 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:01,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 1016 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:07:01,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-07-14 06:07:01,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 354. [2022-07-14 06:07:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 350 states have (on average 1.1228571428571428) internal successors, (393), 353 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 393 transitions. [2022-07-14 06:07:01,736 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 393 transitions. Word has length 50 [2022-07-14 06:07:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:01,736 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 393 transitions. [2022-07-14 06:07:01,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.0) internal successors, (129), 44 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:01,736 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 393 transitions. [2022-07-14 06:07:01,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 06:07:01,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:01,737 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:01,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:01,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:01,961 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:07:01,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:01,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1797000338, now seen corresponding path program 12 times [2022-07-14 06:07:01,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:01,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302333802] [2022-07-14 06:07:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:01,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:07:02,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:02,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302333802] [2022-07-14 06:07:02,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302333802] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:02,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161948894] [2022-07-14 06:07:02,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:07:02,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:02,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:02,296 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:02,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-14 06:07:02,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-14 06:07:02,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:02,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-14 06:07:02,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:02,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:07:02,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:02,903 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 22 treesize of output 21 [2022-07-14 06:07:03,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:03,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:03,313 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 06:07:03,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2022-07-14 06:07:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:07:03,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:04,971 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) is different from false [2022-07-14 06:07:04,976 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-14 06:07:04,977 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 113 treesize of output 103 [2022-07-14 06:07:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:07:05,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161948894] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:05,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:05,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 23] total 57 [2022-07-14 06:07:05,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800110089] [2022-07-14 06:07:05,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:05,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-14 06:07:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:05,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-14 06:07:05,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2864, Unknown=1, NotChecked=108, Total=3192 [2022-07-14 06:07:05,431 INFO L87 Difference]: Start difference. First operand 354 states and 393 transitions. Second operand has 57 states, 57 states have (on average 2.3157894736842106) internal successors, (132), 57 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:07,505 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) (.cse0 (+ (- 1) |c_ULTIMATE.start_main_~length1~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset| (* |c_ULTIMATE.start_main_~n~0#1| (- 1))))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |c_ULTIMATE.start_main_~length1~0#1| 7) (or (<= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~i~0#1| 1)) (<= 1 |c_ULTIMATE.start_main_~n~0#1|)) (= |c_ULTIMATE.start_main_~n~0#1| 1) (or (<= |c_ULTIMATE.start_main_~n~0#1| 1) (not (<= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~i~0#1|)))) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (= .cse0 .cse1) (= |c_ULTIMATE.start_main_~length2~0#1| 1) (< 6 |c_ULTIMATE.start_main_~length1~0#1|) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) .cse1) 0) (or (and (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 5)) (not (= (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) .cse0))) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse2 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse2 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) (exists ((|ULTIMATE.start_main_~length1~0#1| Int)) (and (<= |ULTIMATE.start_main_~length1~0#1| 7) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |ULTIMATE.start_main_~length1~0#1| (- 2) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (< 6 |ULTIMATE.start_main_~length1~0#1|))) (<= |c_ULTIMATE.start_main_~i~0#1| 6))) is different from false [2022-07-14 06:07:09,513 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (<= |c_ULTIMATE.start_main_~n~0#1| 1)) (.cse3 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) (.cse0 (<= 1 |c_ULTIMATE.start_main_~n~0#1|)) (.cse2 (+ (- 1) |c_ULTIMATE.start_main_~length1~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset| (* |c_ULTIMATE.start_main_~n~0#1| (- 1))))) (and (or (<= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~i~0#1| 1)) .cse0) .cse1 (or .cse1 (not (<= |c_ULTIMATE.start_main_~length1~0#1| (+ |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~i~0#1|)))) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (= .cse2 .cse3) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) .cse3) 0) .cse0 (or (and (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 5)) (not (= (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) .cse2))) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse4 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse4 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))))) is different from false [2022-07-14 06:07:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:09,717 INFO L93 Difference]: Finished difference Result 484 states and 524 transitions. [2022-07-14 06:07:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-14 06:07:09,718 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3157894736842106) internal successors, (132), 57 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-14 06:07:09,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:09,719 INFO L225 Difference]: With dead ends: 484 [2022-07-14 06:07:09,719 INFO L226 Difference]: Without dead ends: 445 [2022-07-14 06:07:09,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=548, Invalid=6267, Unknown=3, NotChecked=492, Total=7310 [2022-07-14 06:07:09,720 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 348 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 536 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:09,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1360 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 912 Invalid, 0 Unknown, 536 Unchecked, 0.4s Time] [2022-07-14 06:07:09,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-07-14 06:07:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 363. [2022-07-14 06:07:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 359 states have (on average 1.1197771587743732) internal successors, (402), 362 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 402 transitions. [2022-07-14 06:07:09,725 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 402 transitions. Word has length 52 [2022-07-14 06:07:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:09,725 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 402 transitions. [2022-07-14 06:07:09,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3157894736842106) internal successors, (132), 57 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:09,726 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 402 transitions. [2022-07-14 06:07:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 06:07:09,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:09,727 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:09,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:09,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-14 06:07:09,951 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:07:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash -558804912, now seen corresponding path program 5 times [2022-07-14 06:07:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:09,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343024306] [2022-07-14 06:07:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:09,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 38 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:07:10,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:10,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343024306] [2022-07-14 06:07:10,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343024306] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:10,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997382660] [2022-07-14 06:07:10,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:07:10,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:10,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:10,795 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:10,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-14 06:07:10,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-14 06:07:10,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:10,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-14 06:07:10,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:10,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:07:11,271 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 17 treesize of output 13 [2022-07-14 06:07:11,318 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 20 treesize of output 22 [2022-07-14 06:07:12,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:12,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:12,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:12,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:12,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:12,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:12,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:12,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:12,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:12,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:12,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:12,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:12,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:12,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:12,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:12,134 INFO L356 Elim1Store]: treesize reduction 61, result has 35.8 percent of original size [2022-07-14 06:07:12,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 71 treesize of output 60 [2022-07-14 06:07:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:07:12,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:12,376 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1205 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1205) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= 0 (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) is different from false [2022-07-14 06:07:12,384 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:12,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 85 [2022-07-14 06:07:12,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,418 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:12,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 161 treesize of output 211 [2022-07-14 06:07:12,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:12,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 43 [2022-07-14 06:07:13,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:07:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 48 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:07:13,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997382660] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:13,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:13,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 62 [2022-07-14 06:07:13,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487741444] [2022-07-14 06:07:13,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:13,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-14 06:07:13,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:13,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-14 06:07:13,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3299, Unknown=1, NotChecked=118, Total=3782 [2022-07-14 06:07:13,304 INFO L87 Difference]: Start difference. First operand 363 states and 402 transitions. Second operand has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:17,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:17,489 INFO L93 Difference]: Finished difference Result 614 states and 675 transitions. [2022-07-14 06:07:17,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-14 06:07:17,489 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-14 06:07:17,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:17,491 INFO L225 Difference]: With dead ends: 614 [2022-07-14 06:07:17,491 INFO L226 Difference]: Without dead ends: 564 [2022-07-14 06:07:17,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 96 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1391, Invalid=7924, Unknown=1, NotChecked=190, Total=9506 [2022-07-14 06:07:17,492 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 715 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:17,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 561 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 670 Invalid, 0 Unknown, 299 Unchecked, 0.4s Time] [2022-07-14 06:07:17,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-07-14 06:07:17,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 382. [2022-07-14 06:07:17,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 378 states have (on average 1.1216931216931216) internal successors, (424), 381 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 424 transitions. [2022-07-14 06:07:17,498 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 424 transitions. Word has length 52 [2022-07-14 06:07:17,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:17,498 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 424 transitions. [2022-07-14 06:07:17,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:17,498 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 424 transitions. [2022-07-14 06:07:17,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 06:07:17,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:17,499 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:17,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:17,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-14 06:07:17,719 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:07:17,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:17,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1217377784, now seen corresponding path program 3 times [2022-07-14 06:07:17,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:17,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455029268] [2022-07-14 06:07:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:17,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:07:17,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:17,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455029268] [2022-07-14 06:07:17,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455029268] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:17,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244993867] [2022-07-14 06:07:17,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:07:17,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:17,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:17,877 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:17,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-14 06:07:18,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:07:18,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:18,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-14 06:07:18,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:18,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:07:18,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:18,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:07:18,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:07:18,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:18,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:07:18,911 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:18,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-14 06:07:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:07:19,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:20,200 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:20,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-14 06:07:20,207 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:20,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-14 06:07:20,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-14 06:07:20,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:20,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:07:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:07:20,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244993867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:20,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:20,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 51 [2022-07-14 06:07:20,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925312036] [2022-07-14 06:07:20,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:20,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-14 06:07:20,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:20,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-14 06:07:20,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2338, Unknown=1, NotChecked=0, Total=2550 [2022-07-14 06:07:20,927 INFO L87 Difference]: Start difference. First operand 382 states and 424 transitions. Second operand has 51 states, 51 states have (on average 2.5098039215686274) internal successors, (128), 51 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:22,470 INFO L93 Difference]: Finished difference Result 517 states and 567 transitions. [2022-07-14 06:07:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-14 06:07:22,470 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.5098039215686274) internal successors, (128), 51 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-14 06:07:22,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:22,472 INFO L225 Difference]: With dead ends: 517 [2022-07-14 06:07:22,472 INFO L226 Difference]: Without dead ends: 485 [2022-07-14 06:07:22,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2297 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=824, Invalid=7547, Unknown=1, NotChecked=0, Total=8372 [2022-07-14 06:07:22,473 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 177 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:22,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 386 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 280 Invalid, 0 Unknown, 403 Unchecked, 0.2s Time] [2022-07-14 06:07:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-07-14 06:07:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 356. [2022-07-14 06:07:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 352 states have (on average 1.125) internal successors, (396), 355 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 396 transitions. [2022-07-14 06:07:22,478 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 396 transitions. Word has length 52 [2022-07-14 06:07:22,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:22,478 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 396 transitions. [2022-07-14 06:07:22,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.5098039215686274) internal successors, (128), 51 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:22,479 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 396 transitions. [2022-07-14 06:07:22,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-14 06:07:22,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:22,480 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:22,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:22,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:22,695 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:07:22,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:22,696 INFO L85 PathProgramCache]: Analyzing trace with hash -554980724, now seen corresponding path program 3 times [2022-07-14 06:07:22,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:22,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28306477] [2022-07-14 06:07:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:22,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:07:22,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:22,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28306477] [2022-07-14 06:07:22,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28306477] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:22,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167217354] [2022-07-14 06:07:22,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:07:22,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:22,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:22,858 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:22,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-14 06:07:22,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:07:22,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:22,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-14 06:07:22,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:23,009 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:07:23,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:07:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:07:23,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:07:23,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167217354] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:23,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:23,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2022-07-14 06:07:23,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336683323] [2022-07-14 06:07:23,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:23,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-14 06:07:23,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:23,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-14 06:07:23,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:07:23,602 INFO L87 Difference]: Start difference. First operand 356 states and 396 transitions. Second operand has 33 states, 32 states have (on average 3.53125) internal successors, (113), 33 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:24,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:24,068 INFO L93 Difference]: Finished difference Result 464 states and 503 transitions. [2022-07-14 06:07:24,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 06:07:24,068 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.53125) internal successors, (113), 33 states have internal predecessors, (113), 0 states have call successors, (0), 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 53 [2022-07-14 06:07:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:24,069 INFO L225 Difference]: With dead ends: 464 [2022-07-14 06:07:24,069 INFO L226 Difference]: Without dead ends: 464 [2022-07-14 06:07:24,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2022-07-14 06:07:24,070 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 401 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:24,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 435 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:07:24,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-07-14 06:07:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 387. [2022-07-14 06:07:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 383 states have (on average 1.1174934725848564) internal successors, (428), 386 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 428 transitions. [2022-07-14 06:07:24,075 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 428 transitions. Word has length 53 [2022-07-14 06:07:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:24,075 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 428 transitions. [2022-07-14 06:07:24,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.53125) internal successors, (113), 33 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 428 transitions. [2022-07-14 06:07:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 06:07:24,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:24,076 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:24,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:24,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-14 06:07:24,300 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:07:24,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:24,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1402960811, now seen corresponding path program 13 times [2022-07-14 06:07:24,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:24,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621879246] [2022-07-14 06:07:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:24,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:24,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:24,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621879246] [2022-07-14 06:07:24,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621879246] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:24,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489816688] [2022-07-14 06:07:24,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:07:24,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:24,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:24,543 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:24,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-14 06:07:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:24,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-14 06:07:24,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:24,691 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:07:24,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:07:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:25,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 91 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:26,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489816688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:26,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:26,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 58 [2022-07-14 06:07:26,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199014499] [2022-07-14 06:07:26,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:26,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-14 06:07:26,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:26,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-14 06:07:26,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=3085, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 06:07:26,794 INFO L87 Difference]: Start difference. First operand 387 states and 428 transitions. Second operand has 59 states, 58 states have (on average 2.793103448275862) internal successors, (162), 59 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:28,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:28,510 INFO L93 Difference]: Finished difference Result 767 states and 830 transitions. [2022-07-14 06:07:28,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-14 06:07:28,511 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 2.793103448275862) internal successors, (162), 59 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-14 06:07:28,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:28,512 INFO L225 Difference]: With dead ends: 767 [2022-07-14 06:07:28,512 INFO L226 Difference]: Without dead ends: 751 [2022-07-14 06:07:28,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1200, Invalid=7920, Unknown=0, NotChecked=0, Total=9120 [2022-07-14 06:07:28,513 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 433 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 2641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1422 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:28,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1797 Invalid, 2641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1160 Invalid, 0 Unknown, 1422 Unchecked, 0.5s Time] [2022-07-14 06:07:28,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-07-14 06:07:28,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 415. [2022-07-14 06:07:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 411 states have (on average 1.1143552311435523) internal successors, (458), 414 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 458 transitions. [2022-07-14 06:07:28,519 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 458 transitions. Word has length 56 [2022-07-14 06:07:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:28,520 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 458 transitions. [2022-07-14 06:07:28,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 2.793103448275862) internal successors, (162), 59 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 458 transitions. [2022-07-14 06:07:28,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-14 06:07:28,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:28,521 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:28,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:28,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-14 06:07:28,747 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:07:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash 374392270, now seen corresponding path program 14 times [2022-07-14 06:07:28,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:28,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637562986] [2022-07-14 06:07:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:28,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:07:29,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:29,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637562986] [2022-07-14 06:07:29,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637562986] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:29,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872284991] [2022-07-14 06:07:29,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:07:29,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:29,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:29,178 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:29,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-14 06:07:29,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:07:29,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:29,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-14 06:07:29,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:29,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:07:29,788 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 17 treesize of output 13 [2022-07-14 06:07:29,824 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 20 treesize of output 22 [2022-07-14 06:07:29,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:07:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:07:29,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:30,058 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1409 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1409) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:07:30,070 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:30,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-14 06:07:30,087 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:30,087 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 40 treesize of output 40 [2022-07-14 06:07:30,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:07:30,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:07:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:07:30,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872284991] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:30,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:30,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 51 [2022-07-14 06:07:30,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668926873] [2022-07-14 06:07:30,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:30,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-14 06:07:30,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:30,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-14 06:07:30,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2283, Unknown=1, NotChecked=96, Total=2550 [2022-07-14 06:07:30,561 INFO L87 Difference]: Start difference. First operand 415 states and 458 transitions. Second operand has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:31,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:31,732 INFO L93 Difference]: Finished difference Result 555 states and 601 transitions. [2022-07-14 06:07:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-14 06:07:31,733 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 0 states have call successors, (0), 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 58 [2022-07-14 06:07:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:31,734 INFO L225 Difference]: With dead ends: 555 [2022-07-14 06:07:31,734 INFO L226 Difference]: Without dead ends: 512 [2022-07-14 06:07:31,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=365, Invalid=4750, Unknown=1, NotChecked=140, Total=5256 [2022-07-14 06:07:31,735 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 149 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:31,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1241 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1396 Invalid, 0 Unknown, 140 Unchecked, 0.5s Time] [2022-07-14 06:07:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-07-14 06:07:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 424. [2022-07-14 06:07:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 420 states have (on average 1.111904761904762) internal successors, (467), 423 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:31,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 467 transitions. [2022-07-14 06:07:31,740 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 467 transitions. Word has length 58 [2022-07-14 06:07:31,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:31,740 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 467 transitions. [2022-07-14 06:07:31,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 51 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:31,741 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 467 transitions. [2022-07-14 06:07:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-14 06:07:31,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:31,742 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:31,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-07-14 06:07:31,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:31,955 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:07:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:31,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1250411276, now seen corresponding path program 6 times [2022-07-14 06:07:31,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:31,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909773508] [2022-07-14 06:07:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:31,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 41 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:07:33,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:33,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909773508] [2022-07-14 06:07:33,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909773508] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:33,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523091943] [2022-07-14 06:07:33,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:07:33,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:33,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:33,247 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:33,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-14 06:07:33,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-14 06:07:33,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:33,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-14 06:07:33,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:33,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:07:33,960 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 17 treesize of output 13 [2022-07-14 06:07:34,016 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 20 treesize of output 22 [2022-07-14 06:07:34,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:34,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:34,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:34,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:34,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:34,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:34,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:34,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:34,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:34,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:34,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:34,919 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:34,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 34 [2022-07-14 06:07:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:07:34,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:35,418 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1459 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1459) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) is different from false [2022-07-14 06:07:35,425 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:35,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 97 [2022-07-14 06:07:35,505 INFO L356 Elim1Store]: treesize reduction 280, result has 20.2 percent of original size [2022-07-14 06:07:35,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 186 treesize of output 206 [2022-07-14 06:07:35,518 INFO L356 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-07-14 06:07:35,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 76 treesize of output 50 [2022-07-14 06:07:37,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:07:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:07:37,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523091943] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:37,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:37,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 73 [2022-07-14 06:07:37,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033159632] [2022-07-14 06:07:37,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:37,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-14 06:07:37,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:37,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-14 06:07:37,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=4708, Unknown=1, NotChecked=140, Total=5256 [2022-07-14 06:07:37,157 INFO L87 Difference]: Start difference. First operand 424 states and 467 transitions. Second operand has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 73 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:41,669 INFO L93 Difference]: Finished difference Result 634 states and 692 transitions. [2022-07-14 06:07:41,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-14 06:07:41,669 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 73 states have internal predecessors, (150), 0 states have call successors, (0), 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 58 [2022-07-14 06:07:41,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:41,671 INFO L225 Difference]: With dead ends: 634 [2022-07-14 06:07:41,671 INFO L226 Difference]: Without dead ends: 578 [2022-07-14 06:07:41,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3609 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1380, Invalid=13143, Unknown=1, NotChecked=238, Total=14762 [2022-07-14 06:07:41,672 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 777 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:41,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 814 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1797 Invalid, 0 Unknown, 127 Unchecked, 1.0s Time] [2022-07-14 06:07:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-07-14 06:07:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 443. [2022-07-14 06:07:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 439 states have (on average 1.1138952164009113) internal successors, (489), 442 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 489 transitions. [2022-07-14 06:07:41,676 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 489 transitions. Word has length 58 [2022-07-14 06:07:41,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:41,676 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 489 transitions. [2022-07-14 06:07:41,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 73 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 489 transitions. [2022-07-14 06:07:41,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-14 06:07:41,678 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:41,678 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:41,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:41,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:41,906 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:07:41,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:41,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1533222772, now seen corresponding path program 4 times [2022-07-14 06:07:41,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:41,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391302800] [2022-07-14 06:07:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:41,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:42,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:42,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391302800] [2022-07-14 06:07:42,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391302800] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:42,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378373366] [2022-07-14 06:07:42,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:07:42,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:42,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:42,342 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:42,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-14 06:07:42,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:07:42,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:42,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-14 06:07:42,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:42,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:07:42,850 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 17 treesize of output 13 [2022-07-14 06:07:42,896 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 20 treesize of output 22 [2022-07-14 06:07:43,109 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:43,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-14 06:07:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:43,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:43,474 WARN L833 $PredicateComparison]: unable to prove that (or (= (mod (+ |c_ULTIMATE.start_main_~n~0#1| 4294967295) 4294967296) 0) (forall ((v_ArrVal_1514 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1514) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0))) is different from false [2022-07-14 06:07:43,480 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:43,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-14 06:07:43,485 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:43,485 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 40 treesize of output 40 [2022-07-14 06:07:43,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:07:44,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:07:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:44,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378373366] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:44,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:44,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 54 [2022-07-14 06:07:44,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761896820] [2022-07-14 06:07:44,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:44,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-14 06:07:44,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:44,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-14 06:07:44,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2459, Unknown=1, NotChecked=102, Total=2862 [2022-07-14 06:07:44,055 INFO L87 Difference]: Start difference. First operand 443 states and 489 transitions. Second operand has 54 states, 54 states have (on average 2.537037037037037) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:45,299 INFO L93 Difference]: Finished difference Result 546 states and 597 transitions. [2022-07-14 06:07:45,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-14 06:07:45,300 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.537037037037037) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-14 06:07:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:45,301 INFO L225 Difference]: With dead ends: 546 [2022-07-14 06:07:45,301 INFO L226 Difference]: Without dead ends: 538 [2022-07-14 06:07:45,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=774, Invalid=4779, Unknown=1, NotChecked=146, Total=5700 [2022-07-14 06:07:45,302 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 262 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:45,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 607 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 735 Invalid, 0 Unknown, 160 Unchecked, 0.4s Time] [2022-07-14 06:07:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-07-14 06:07:45,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 449. [2022-07-14 06:07:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 445 states have (on average 1.1168539325842697) internal successors, (497), 448 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:45,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 497 transitions. [2022-07-14 06:07:45,314 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 497 transitions. Word has length 58 [2022-07-14 06:07:45,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:45,314 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 497 transitions. [2022-07-14 06:07:45,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.537037037037037) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:45,314 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 497 transitions. [2022-07-14 06:07:45,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-14 06:07:45,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:45,315 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:45,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-14 06:07:45,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:45,531 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:07:45,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:45,532 INFO L85 PathProgramCache]: Analyzing trace with hash -859796103, now seen corresponding path program 4 times [2022-07-14 06:07:45,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:45,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103090876] [2022-07-14 06:07:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:45,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:07:45,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:45,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103090876] [2022-07-14 06:07:45,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103090876] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:45,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685817379] [2022-07-14 06:07:45,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:07:45,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:45,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:45,712 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:45,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-14 06:07:45,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:07:45,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:45,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-14 06:07:45,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:46,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:07:46,264 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-07-14 06:07:46,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2022-07-14 06:07:46,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:46,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:46,281 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2022-07-14 06:07:46,460 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 26 treesize of output 26 [2022-07-14 06:07:46,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:46,553 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:46,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2022-07-14 06:07:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:07:46,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:46,624 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1572 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-07-14 06:07:46,628 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1572 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) is different from false [2022-07-14 06:07:46,634 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1572 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) (= |c_ULTIMATE.start_cstrncat_#t~mem6#1| 0)) is different from false [2022-07-14 06:07:46,641 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1572 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_#t~post5#1.base|) |c_ULTIMATE.start_cstrncat_#t~post5#1.offset|) 0)) is different from false [2022-07-14 06:07:46,645 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1572 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-07-14 06:07:46,684 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1572 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~d~0#1.offset|) 0)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-07-14 06:07:46,691 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~src#1.base|) |c_ULTIMATE.start_cstrncat_~src#1.offset|) 0) (forall ((v_ArrVal_1572 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~src#1.offset|)) 0) (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~dst#1.offset|) 0))))) is different from false [2022-07-14 06:07:46,697 WARN L833 $PredicateComparison]: unable to prove that (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0) (forall ((v_ArrVal_1572 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0)))) is different from false [2022-07-14 06:07:46,719 INFO L356 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2022-07-14 06:07:46,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 69 treesize of output 85 [2022-07-14 06:07:46,730 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:46,730 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 49 treesize of output 51 [2022-07-14 06:07:46,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:07:46,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:46,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-07-14 06:07:46,767 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:46,768 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 66 treesize of output 70 [2022-07-14 06:07:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 13 not checked. [2022-07-14 06:07:47,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685817379] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:47,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:47,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 20] total 52 [2022-07-14 06:07:47,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277923261] [2022-07-14 06:07:47,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:47,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-14 06:07:47,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:47,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-14 06:07:47,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1757, Unknown=8, NotChecked=728, Total=2652 [2022-07-14 06:07:47,076 INFO L87 Difference]: Start difference. First operand 449 states and 497 transitions. Second operand has 52 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 52 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:48,820 WARN L833 $PredicateComparison]: unable to prove that (and (or (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~src#1.base|) |c_ULTIMATE.start_cstrncat_~src#1.offset|) 0) (forall ((v_ArrVal_1572 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~src#1.offset|)) 0) (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~dst#1.offset|) 0))))) (exists ((|ULTIMATE.start_main_~length2~0#1| Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ (- 1) |ULTIMATE.start_main_~length2~0#1|)) 0) (<= |ULTIMATE.start_main_~length2~0#1| 3) (< 2 |ULTIMATE.start_main_~length2~0#1|))) (= |c_ULTIMATE.start_cstrncat_~dst#1.offset| 0) (= |c_ULTIMATE.start_cstrncat_~src#1.offset| 0)) is different from false [2022-07-14 06:07:48,995 WARN L833 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_1572 (Array Int Int)) (|ULTIMATE.start_cstrncat_~d~0#1.base| Int)) (or (not (= (select (select |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base|) |c_ULTIMATE.start_cstrncat_~d~0#1.offset|) 0)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) (= |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 0) (exists ((|ULTIMATE.start_main_~length2~0#1| Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~length2~0#1|)) 0) (<= |ULTIMATE.start_main_~length2~0#1| 3) (< 2 |ULTIMATE.start_main_~length2~0#1|))) (= |c_ULTIMATE.start_cstrncat_~d~0#1.offset| 0)) is different from false [2022-07-14 06:07:50,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:50,031 INFO L93 Difference]: Finished difference Result 658 states and 715 transitions. [2022-07-14 06:07:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-14 06:07:50,032 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 52 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-14 06:07:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:50,033 INFO L225 Difference]: With dead ends: 658 [2022-07-14 06:07:50,033 INFO L226 Difference]: Without dead ends: 586 [2022-07-14 06:07:50,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 129 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 4468 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1338, Invalid=13210, Unknown=12, NotChecked=2470, Total=17030 [2022-07-14 06:07:50,034 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 493 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:50,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 555 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 586 Invalid, 0 Unknown, 1135 Unchecked, 0.3s Time] [2022-07-14 06:07:50,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-07-14 06:07:50,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 489. [2022-07-14 06:07:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 485 states have (on average 1.1134020618556701) internal successors, (540), 488 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:50,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 540 transitions. [2022-07-14 06:07:50,040 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 540 transitions. Word has length 59 [2022-07-14 06:07:50,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:50,040 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 540 transitions. [2022-07-14 06:07:50,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 52 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 540 transitions. [2022-07-14 06:07:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-14 06:07:50,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:50,041 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:50,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:50,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-14 06:07:50,255 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:07:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash -469355232, now seen corresponding path program 2 times [2022-07-14 06:07:50,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:50,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248250593] [2022-07-14 06:07:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:50,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:07:50,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:50,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248250593] [2022-07-14 06:07:50,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248250593] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:50,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573129491] [2022-07-14 06:07:50,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:07:50,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:50,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:50,460 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:50,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-14 06:07:50,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:07:50,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:50,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-14 06:07:50,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:50,638 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:07:50,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:07:50,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:07:50,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:07:51,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:07:51,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:07:51,235 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:51,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-14 06:07:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-14 06:07:51,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:51,660 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1634 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1634) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ 2 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|)) 0) (<= (+ |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| 4) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s~0#1.base|)) (not (<= |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| |c_ULTIMATE.start_cstrncat_~s~0#1.offset|)))) is different from false [2022-07-14 06:07:51,700 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1634 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_1634) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 2 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|)) 0) (< |c_ULTIMATE.start_cstrncat_~src#1.offset| |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|) (<= (+ |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| 4) (select |c_#length| |c_ULTIMATE.start_cstrncat_~src#1.base|)))) is different from false [2022-07-14 06:07:51,709 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1634 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|)) (<= (+ |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1634) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 2 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_95|)) 0))) is different from false [2022-07-14 06:07:51,715 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:51,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:07:51,720 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:51,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:07:51,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:07:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 3 not checked. [2022-07-14 06:07:52,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573129491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:52,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:52,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2022-07-14 06:07:52,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9320373] [2022-07-14 06:07:52,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:52,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-14 06:07:52,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:52,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-14 06:07:52,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1657, Unknown=3, NotChecked=252, Total=2070 [2022-07-14 06:07:52,317 INFO L87 Difference]: Start difference. First operand 489 states and 540 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:53,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:53,884 INFO L93 Difference]: Finished difference Result 668 states and 723 transitions. [2022-07-14 06:07:53,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-14 06:07:53,884 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-14 06:07:53,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:53,886 INFO L225 Difference]: With dead ends: 668 [2022-07-14 06:07:53,886 INFO L226 Difference]: Without dead ends: 624 [2022-07-14 06:07:53,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=768, Invalid=6551, Unknown=3, NotChecked=510, Total=7832 [2022-07-14 06:07:53,887 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 202 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 606 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:53,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 489 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 487 Invalid, 0 Unknown, 606 Unchecked, 0.2s Time] [2022-07-14 06:07:53,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-07-14 06:07:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 500. [2022-07-14 06:07:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 496 states have (on average 1.1068548387096775) internal successors, (549), 499 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 549 transitions. [2022-07-14 06:07:53,891 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 549 transitions. Word has length 61 [2022-07-14 06:07:53,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:53,891 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 549 transitions. [2022-07-14 06:07:53,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:53,891 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 549 transitions. [2022-07-14 06:07:53,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-14 06:07:53,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:53,892 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:53,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:54,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-14 06:07:54,095 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:07:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:54,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1518395567, now seen corresponding path program 15 times [2022-07-14 06:07:54,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:54,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688576440] [2022-07-14 06:07:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:54,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:54,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:54,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688576440] [2022-07-14 06:07:54,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688576440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:54,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737411229] [2022-07-14 06:07:54,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:07:54,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:54,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:54,428 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:54,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-14 06:07:54,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-14 06:07:54,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:54,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-14 06:07:54,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:54,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:07:54,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:07:54,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:07:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 91 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:55,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 120 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:55,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737411229] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:55,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:55,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2022-07-14 06:07:55,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541791111] [2022-07-14 06:07:55,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:55,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-14 06:07:55,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:55,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-14 06:07:55,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2022-07-14 06:07:55,951 INFO L87 Difference]: Start difference. First operand 500 states and 549 transitions. Second operand has 62 states, 61 states have (on average 2.8852459016393444) internal successors, (176), 62 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:57,156 INFO L93 Difference]: Finished difference Result 1028 states and 1109 transitions. [2022-07-14 06:07:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-14 06:07:57,156 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.8852459016393444) internal successors, (176), 62 states have internal predecessors, (176), 0 states have call successors, (0), 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 62 [2022-07-14 06:07:57,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:57,158 INFO L225 Difference]: With dead ends: 1028 [2022-07-14 06:07:57,158 INFO L226 Difference]: Without dead ends: 1012 [2022-07-14 06:07:57,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1214, Invalid=4948, Unknown=0, NotChecked=0, Total=6162 [2022-07-14 06:07:57,159 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 765 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:57,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 1180 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-14 06:07:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-07-14 06:07:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 534. [2022-07-14 06:07:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 530 states have (on average 1.1037735849056605) internal successors, (585), 533 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 585 transitions. [2022-07-14 06:07:57,165 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 585 transitions. Word has length 62 [2022-07-14 06:07:57,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:57,165 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 585 transitions. [2022-07-14 06:07:57,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.8852459016393444) internal successors, (176), 62 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 585 transitions. [2022-07-14 06:07:57,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-14 06:07:57,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:57,167 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:57,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:57,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-14 06:07:57,383 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:07:57,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:57,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1110741450, now seen corresponding path program 16 times [2022-07-14 06:07:57,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:57,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909050333] [2022-07-14 06:07:57,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:57,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 24 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:07:58,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:58,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909050333] [2022-07-14 06:07:58,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909050333] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:58,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594988584] [2022-07-14 06:07:58,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:07:58,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:58,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:58,175 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:58,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-14 06:07:58,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:07:58,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:58,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-14 06:07:58,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:58,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:07:58,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:07:58,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:07:59,388 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-14 06:07:59,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-14 06:07:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 24 proven. 176 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:07:59,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:59,791 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1743 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1743) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:07:59,796 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:59,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-14 06:07:59,801 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:59,801 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 40 treesize of output 40 [2022-07-14 06:07:59,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:08:00,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:08:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 24 proven. 176 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:08:00,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594988584] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:00,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:08:00,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 73 [2022-07-14 06:08:00,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119122955] [2022-07-14 06:08:00,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:00,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-14 06:08:00,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:08:00,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-14 06:08:00,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=4891, Unknown=1, NotChecked=140, Total=5256 [2022-07-14 06:08:00,407 INFO L87 Difference]: Start difference. First operand 534 states and 585 transitions. Second operand has 73 states, 73 states have (on average 2.4383561643835616) internal successors, (178), 73 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:03,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:03,416 INFO L93 Difference]: Finished difference Result 635 states and 688 transitions. [2022-07-14 06:08:03,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-14 06:08:03,416 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.4383561643835616) internal successors, (178), 73 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-14 06:08:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:03,418 INFO L225 Difference]: With dead ends: 635 [2022-07-14 06:08:03,418 INFO L226 Difference]: Without dead ends: 588 [2022-07-14 06:08:03,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 121 ConstructedPredicates, 1 IntricatePredicates, 10 DeprecatedPredicates, 3985 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=748, Invalid=14016, Unknown=2, NotChecked=240, Total=15006 [2022-07-14 06:08:03,418 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 235 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:03,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1407 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2142 Invalid, 0 Unknown, 201 Unchecked, 0.8s Time] [2022-07-14 06:08:03,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-07-14 06:08:03,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 543. [2022-07-14 06:08:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 539 states have (on average 1.1020408163265305) internal successors, (594), 542 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 594 transitions. [2022-07-14 06:08:03,422 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 594 transitions. Word has length 64 [2022-07-14 06:08:03,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:03,422 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 594 transitions. [2022-07-14 06:08:03,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.4383561643835616) internal successors, (178), 73 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:03,423 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 594 transitions. [2022-07-14 06:08:03,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-14 06:08:03,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:03,424 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:03,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:03,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-14 06:08:03,625 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:08:03,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:03,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1312565384, now seen corresponding path program 7 times [2022-07-14 06:08:03,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:08:03,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980942842] [2022-07-14 06:08:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:03,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:08:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 54 proven. 146 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:08:04,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:08:04,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980942842] [2022-07-14 06:08:04,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980942842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:08:04,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711572213] [2022-07-14 06:08:04,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:08:04,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:08:04,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:08:04,768 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:08:04,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-14 06:08:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-14 06:08:04,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:04,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:08:05,455 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 17 treesize of output 13 [2022-07-14 06:08:05,511 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 20 treesize of output 22 [2022-07-14 06:08:29,149 INFO L356 Elim1Store]: treesize reduction 403, result has 10.2 percent of original size [2022-07-14 06:08:29,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 91 treesize of output 80 [2022-07-14 06:08:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 44 proven. 127 refuted. 29 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:08:29,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:31,303 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1798 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1798) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= 0 (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1))) (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) is different from false [2022-07-14 06:08:31,311 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:08:31,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 109 [2022-07-14 06:08:31,416 INFO L356 Elim1Store]: treesize reduction 368, result has 18.0 percent of original size [2022-07-14 06:08:31,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 211 treesize of output 235 [2022-07-14 06:08:31,430 INFO L356 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2022-07-14 06:08:31,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 87 treesize of output 57 [2022-07-14 06:08:33,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:08:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 80 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:08:33,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711572213] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:33,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:08:33,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 80 [2022-07-14 06:08:33,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424256595] [2022-07-14 06:08:33,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:33,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-14 06:08:33,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:08:33,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-14 06:08:33,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=5602, Unknown=38, NotChecked=154, Total=6320 [2022-07-14 06:08:33,675 INFO L87 Difference]: Start difference. First operand 543 states and 594 transitions. Second operand has 80 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:13,281 WARN L233 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 64 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:09:20,721 WARN L233 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 74 DAG size of output: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:09:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:24,472 INFO L93 Difference]: Finished difference Result 713 states and 783 transitions. [2022-07-14 06:09:24,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-14 06:09:24,473 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-14 06:09:24,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:24,474 INFO L225 Difference]: With dead ends: 713 [2022-07-14 06:09:24,474 INFO L226 Difference]: Without dead ends: 651 [2022-07-14 06:09:24,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 3886 ImplicationChecksByTransitivity, 77.7s TimeCoverageRelationStatistics Valid=1497, Invalid=13443, Unknown=70, NotChecked=242, Total=15252 [2022-07-14 06:09:24,476 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 782 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:24,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 741 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 920 Invalid, 0 Unknown, 363 Unchecked, 0.5s Time] [2022-07-14 06:09:24,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-07-14 06:09:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 572. [2022-07-14 06:09:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 568 states have (on average 1.1038732394366197) internal successors, (627), 571 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 627 transitions. [2022-07-14 06:09:24,495 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 627 transitions. Word has length 64 [2022-07-14 06:09:24,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:24,495 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 627 transitions. [2022-07-14 06:09:24,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:24,495 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 627 transitions. [2022-07-14 06:09:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-14 06:09:24,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:24,496 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:24,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:24,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:24,711 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:09:24,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:24,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1729983568, now seen corresponding path program 5 times [2022-07-14 06:09:24,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:24,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345913898] [2022-07-14 06:09:24,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:24,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:26,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:26,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345913898] [2022-07-14 06:09:26,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345913898] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:26,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495301582] [2022-07-14 06:09:26,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:09:26,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:26,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:26,157 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:26,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-14 06:09:26,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-14 06:09:26,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:26,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-14 06:09:26,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:26,481 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:09:26,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:09:27,463 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 17 treesize of output 13 [2022-07-14 06:09:27,546 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:09:27,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2022-07-14 06:09:27,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-07-14 06:09:28,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:09:28,372 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:28,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 45 [2022-07-14 06:09:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:28,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:29,637 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:29,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-07-14 06:09:29,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:09:29,647 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:29,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 75 [2022-07-14 06:09:29,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:09:29,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-14 06:09:31,787 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 44 treesize of output 42 [2022-07-14 06:09:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:31,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495301582] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:31,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:31,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30, 29] total 81 [2022-07-14 06:09:31,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137448221] [2022-07-14 06:09:31,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:31,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-14 06:09:31,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:31,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-14 06:09:31,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=6046, Unknown=1, NotChecked=0, Total=6480 [2022-07-14 06:09:31,873 INFO L87 Difference]: Start difference. First operand 572 states and 627 transitions. Second operand has 81 states, 81 states have (on average 2.197530864197531) internal successors, (178), 81 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:36,635 INFO L93 Difference]: Finished difference Result 616 states and 676 transitions. [2022-07-14 06:09:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-14 06:09:36,636 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.197530864197531) internal successors, (178), 81 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-14 06:09:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:36,637 INFO L225 Difference]: With dead ends: 616 [2022-07-14 06:09:36,637 INFO L226 Difference]: Without dead ends: 594 [2022-07-14 06:09:36,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3712 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1099, Invalid=14400, Unknown=1, NotChecked=0, Total=15500 [2022-07-14 06:09:36,638 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 308 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 661 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:36,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1117 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1670 Invalid, 0 Unknown, 661 Unchecked, 0.8s Time] [2022-07-14 06:09:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-07-14 06:09:36,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 580. [2022-07-14 06:09:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 576 states have (on average 1.1076388888888888) internal successors, (638), 579 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 638 transitions. [2022-07-14 06:09:36,642 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 638 transitions. Word has length 64 [2022-07-14 06:09:36,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:36,642 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 638 transitions. [2022-07-14 06:09:36,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.197530864197531) internal successors, (178), 81 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:36,643 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 638 transitions. [2022-07-14 06:09:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-14 06:09:36,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:36,643 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:36,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-07-14 06:09:36,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-14 06:09:36,844 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:09:36,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:36,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1397521677, now seen corresponding path program 17 times [2022-07-14 06:09:36,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:36,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016402733] [2022-07-14 06:09:36,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:36,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 91 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:37,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:37,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016402733] [2022-07-14 06:09:37,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016402733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:37,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351540723] [2022-07-14 06:09:37,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:09:37,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:37,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:37,223 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:37,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-14 06:09:37,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-14 06:09:37,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:37,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-14 06:09:37,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:37,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:09:37,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:09:37,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:09:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 120 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:38,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 153 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:39,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351540723] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:39,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:39,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 66 [2022-07-14 06:09:39,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070964885] [2022-07-14 06:09:39,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:39,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-14 06:09:39,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:39,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-14 06:09:39,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=3942, Unknown=0, NotChecked=0, Total=4422 [2022-07-14 06:09:39,084 INFO L87 Difference]: Start difference. First operand 580 states and 638 transitions. Second operand has 67 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 67 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:41,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:41,048 INFO L93 Difference]: Finished difference Result 1294 states and 1391 transitions. [2022-07-14 06:09:41,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-14 06:09:41,048 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 67 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-14 06:09:41,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:41,051 INFO L225 Difference]: With dead ends: 1294 [2022-07-14 06:09:41,051 INFO L226 Difference]: Without dead ends: 1278 [2022-07-14 06:09:41,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1664, Invalid=7266, Unknown=0, NotChecked=0, Total=8930 [2022-07-14 06:09:41,052 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 1019 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 1946 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:41,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1019 Valid, 1373 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1946 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-14 06:09:41,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2022-07-14 06:09:41,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 614. [2022-07-14 06:09:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 610 states have (on average 1.1049180327868853) internal successors, (674), 613 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 674 transitions. [2022-07-14 06:09:41,058 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 674 transitions. Word has length 68 [2022-07-14 06:09:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:41,058 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 674 transitions. [2022-07-14 06:09:41,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 67 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 674 transitions. [2022-07-14 06:09:41,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-14 06:09:41,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:41,059 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:41,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:41,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-14 06:09:41,267 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:09:41,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:41,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2119424490, now seen corresponding path program 6 times [2022-07-14 06:09:41,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:41,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913592] [2022-07-14 06:09:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:41,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:09:41,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:41,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913592] [2022-07-14 06:09:41,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913592] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:41,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847555645] [2022-07-14 06:09:41,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:09:41,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:41,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:41,698 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:41,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-14 06:09:41,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-14 06:09:41,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:41,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-14 06:09:41,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:41,916 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:09:41,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:09:42,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:09:42,519 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:09:42,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-14 06:09:42,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 06:09:42,773 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:09:42,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2022-07-14 06:09:42,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:09:42,947 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 11 [2022-07-14 06:09:43,001 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:09:43,001 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 16 treesize of output 14 [2022-07-14 06:09:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-14 06:09:43,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:43,761 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:43,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:09:43,767 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:43,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:09:43,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:09:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 5 proven. 20 refuted. 7 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-14 06:09:44,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847555645] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:44,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:44,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 23] total 62 [2022-07-14 06:09:44,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610655419] [2022-07-14 06:09:44,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:44,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-14 06:09:44,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:44,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-14 06:09:44,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=3514, Unknown=9, NotChecked=0, Total=3782 [2022-07-14 06:09:44,465 INFO L87 Difference]: Start difference. First operand 614 states and 674 transitions. Second operand has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:46,472 INFO L93 Difference]: Finished difference Result 884 states and 966 transitions. [2022-07-14 06:09:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-14 06:09:46,472 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-14 06:09:46,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:46,474 INFO L225 Difference]: With dead ends: 884 [2022-07-14 06:09:46,474 INFO L226 Difference]: Without dead ends: 760 [2022-07-14 06:09:46,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=720, Invalid=8565, Unknown=27, NotChecked=0, Total=9312 [2022-07-14 06:09:46,474 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 108 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:46,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 755 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 415 Invalid, 0 Unknown, 338 Unchecked, 0.2s Time] [2022-07-14 06:09:46,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-07-14 06:09:46,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 652. [2022-07-14 06:09:46,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 648 states have (on average 1.1049382716049383) internal successors, (716), 651 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:46,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 716 transitions. [2022-07-14 06:09:46,479 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 716 transitions. Word has length 68 [2022-07-14 06:09:46,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:46,480 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 716 transitions. [2022-07-14 06:09:46,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 62 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:46,480 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 716 transitions. [2022-07-14 06:09:46,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-14 06:09:46,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:46,480 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:46,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:46,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-07-14 06:09:46,681 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-14 06:09:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:46,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1306431354, now seen corresponding path program 18 times [2022-07-14 06:09:46,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:46,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367832154] [2022-07-14 06:09:46,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:46,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 27 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:47,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:47,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367832154] [2022-07-14 06:09:47,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367832154] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:47,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810085707] [2022-07-14 06:09:47,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:09:47,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:47,232 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:47,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-14 06:09:47,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-14 06:09:47,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:47,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-14 06:09:47,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:47,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:09:48,036 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 17 treesize of output 13 [2022-07-14 06:09:48,076 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 20 treesize of output 22 [2022-07-14 06:09:48,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:09:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 27 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:48,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:48,329 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2036 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2036) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:09:48,333 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:48,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-14 06:09:48,339 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:48,341 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 40 treesize of output 40 [2022-07-14 06:09:48,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:09:48,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:09:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 27 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:48,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810085707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:48,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:48,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 59 [2022-07-14 06:09:48,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898065218] [2022-07-14 06:09:48,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:48,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-14 06:09:48,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:48,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-14 06:09:48,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3113, Unknown=1, NotChecked=112, Total=3422 [2022-07-14 06:09:48,825 INFO L87 Difference]: Start difference. First operand 652 states and 716 transitions. Second operand has 59 states, 59 states have (on average 2.7457627118644066) internal successors, (162), 59 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)