./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/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 d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 16:50:42,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 16:50:42,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 16:50:42,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 16:50:42,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 16:50:42,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 16:50:42,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 16:50:42,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 16:50:42,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 16:50:42,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 16:50:42,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 16:50:42,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 16:50:42,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 16:50:42,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 16:50:42,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 16:50:42,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 16:50:42,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 16:50:42,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 16:50:42,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 16:50:42,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 16:50:42,296 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 16:50:42,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 16:50:42,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 16:50:42,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 16:50:42,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 16:50:42,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 16:50:42,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 16:50:42,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 16:50:42,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 16:50:42,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 16:50:42,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 16:50:42,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 16:50:42,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 16:50:42,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 16:50:42,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 16:50:42,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 16:50:42,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 16:50:42,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 16:50:42,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 16:50:42,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 16:50:42,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 16:50:42,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 16:50:42,320 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 16:50:42,343 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 16:50:42,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 16:50:42,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 16:50:42,344 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 16:50:42,345 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 16:50:42,345 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 16:50:42,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 16:50:42,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 16:50:42,346 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 16:50:42,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 16:50:42,347 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 16:50:42,347 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 16:50:42,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 16:50:42,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 16:50:42,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 16:50:42,347 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 16:50:42,348 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 16:50:42,348 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 16:50:42,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 16:50:42,348 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 16:50:42,348 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 16:50:42,348 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 16:50:42,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 16:50:42,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 16:50:42,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 16:50:42,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:50:42,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 16:50:42,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 16:50:42,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 16:50:42,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 16:50:42,350 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d [2022-07-21 16:50:42,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 16:50:42,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 16:50:42,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 16:50:42,600 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 16:50:42,600 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 16:50:42,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2022-07-21 16:50:42,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f53397aa2/5449cf3f8cfe411191bf6fd123f5d0cd/FLAGc6eae6a4e [2022-07-21 16:50:43,059 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 16:50:43,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2022-07-21 16:50:43,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f53397aa2/5449cf3f8cfe411191bf6fd123f5d0cd/FLAGc6eae6a4e [2022-07-21 16:50:43,080 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f53397aa2/5449cf3f8cfe411191bf6fd123f5d0cd [2022-07-21 16:50:43,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 16:50:43,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 16:50:43,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 16:50:43,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 16:50:43,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 16:50:43,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:50:43" (1/1) ... [2022-07-21 16:50:43,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72b466c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:43, skipping insertion in model container [2022-07-21 16:50:43,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:50:43" (1/1) ... [2022-07-21 16:50:43,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 16:50:43,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 16:50:43,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:50:43,312 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 16:50:43,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:50:43,351 INFO L208 MainTranslator]: Completed translation [2022-07-21 16:50:43,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:43 WrapperNode [2022-07-21 16:50:43,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 16:50:43,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 16:50:43,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 16:50:43,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 16:50:43,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:43" (1/1) ... [2022-07-21 16:50:43,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:43" (1/1) ... [2022-07-21 16:50:43,380 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2022-07-21 16:50:43,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 16:50:43,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 16:50:43,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 16:50:43,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 16:50:43,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:43" (1/1) ... [2022-07-21 16:50:43,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:43" (1/1) ... [2022-07-21 16:50:43,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:43" (1/1) ... [2022-07-21 16:50:43,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:43" (1/1) ... [2022-07-21 16:50:43,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:43" (1/1) ... [2022-07-21 16:50:43,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:43" (1/1) ... [2022-07-21 16:50:43,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:43" (1/1) ... [2022-07-21 16:50:43,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 16:50:43,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 16:50:43,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 16:50:43,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 16:50:43,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:43" (1/1) ... [2022-07-21 16:50:43,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:50:43,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:43,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 16:50:43,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 16:50:43,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 16:50:43,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 16:50:43,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 16:50:43,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 16:50:43,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 16:50:43,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 16:50:43,555 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 16:50:43,556 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 16:50:43,763 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 16:50:43,767 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 16:50:43,770 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 16:50:43,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:50:43 BoogieIcfgContainer [2022-07-21 16:50:43,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 16:50:43,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 16:50:43,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 16:50:43,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 16:50:43,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:50:43" (1/3) ... [2022-07-21 16:50:43,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d165ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:50:43, skipping insertion in model container [2022-07-21 16:50:43,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:43" (2/3) ... [2022-07-21 16:50:43,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d165ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:50:43, skipping insertion in model container [2022-07-21 16:50:43,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:50:43" (3/3) ... [2022-07-21 16:50:43,779 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca-2.i [2022-07-21 16:50:43,789 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 16:50:43,789 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-21 16:50:43,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 16:50:43,841 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@118d04a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3775f688 [2022-07-21 16:50:43,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-21 16:50:43,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:43,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:50:43,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:43,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:43,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:43,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:43,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031117, now seen corresponding path program 1 times [2022-07-21 16:50:43,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:43,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355386589] [2022-07-21 16:50:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:43,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:44,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:44,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355386589] [2022-07-21 16:50:44,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355386589] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:44,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:44,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:50:44,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399060213] [2022-07-21 16:50:44,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:44,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:50:44,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:44,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:50:44,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:50:44,033 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 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) [2022-07-21 16:50:44,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:44,088 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-21 16:50:44,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:50:44,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 16:50:44,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:44,095 INFO L225 Difference]: With dead ends: 54 [2022-07-21 16:50:44,095 INFO L226 Difference]: Without dead ends: 51 [2022-07-21 16:50:44,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:50:44,099 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:44,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:44,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-21 16:50:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-21 16:50:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.84375) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-21 16:50:44,126 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2022-07-21 16:50:44,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:44,127 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-21 16:50:44,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,127 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-21 16:50:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 16:50:44,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:44,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:44,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 16:50:44,128 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:44,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:44,129 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-07-21 16:50:44,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:44,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756725240] [2022-07-21 16:50:44,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:44,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:44,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:44,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756725240] [2022-07-21 16:50:44,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756725240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:44,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:44,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:50:44,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239033557] [2022-07-21 16:50:44,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:44,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:50:44,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:44,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:50:44,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:44,173 INFO L87 Difference]: Start difference. First operand 51 states and 59 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) [2022-07-21 16:50:44,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:44,231 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-21 16:50:44,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:50:44,231 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 [2022-07-21 16:50:44,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:44,232 INFO L225 Difference]: With dead ends: 54 [2022-07-21 16:50:44,232 INFO L226 Difference]: Without dead ends: 51 [2022-07-21 16:50:44,235 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 [2022-07-21 16:50:44,237 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 6 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 197 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 [2022-07-21 16:50:44,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 197 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:44,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-21 16:50:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-21 16:50:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.8125) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-07-21 16:50:44,250 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 8 [2022-07-21 16:50:44,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:44,250 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-07-21 16:50:44,251 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) [2022-07-21 16:50:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-07-21 16:50:44,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 16:50:44,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:44,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:44,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 16:50:44,253 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:44,259 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-07-21 16:50:44,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:44,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967896100] [2022-07-21 16:50:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:44,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:44,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:44,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967896100] [2022-07-21 16:50:44,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967896100] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:44,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:44,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:50:44,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509193381] [2022-07-21 16:50:44,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:44,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:50:44,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:44,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:50:44,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:50:44,310 INFO L87 Difference]: Start difference. First operand 51 states and 58 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) [2022-07-21 16:50:44,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:44,336 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-07-21 16:50:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:50:44,337 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 [2022-07-21 16:50:44,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:44,337 INFO L225 Difference]: With dead ends: 49 [2022-07-21 16:50:44,337 INFO L226 Difference]: Without dead ends: 49 [2022-07-21 16:50:44,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:50:44,338 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 45 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:44,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:44,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-21 16:50:44,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-21 16:50:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.75) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-07-21 16:50:44,342 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 8 [2022-07-21 16:50:44,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:44,342 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-07-21 16:50:44,343 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) [2022-07-21 16:50:44,343 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-07-21 16:50:44,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 16:50:44,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:44,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:44,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 16:50:44,344 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:44,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:44,344 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2022-07-21 16:50:44,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:44,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833309293] [2022-07-21 16:50:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:44,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:44,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:44,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833309293] [2022-07-21 16:50:44,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833309293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:44,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:44,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:50:44,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375275441] [2022-07-21 16:50:44,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:44,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:50:44,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:44,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:50:44,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:44,403 INFO L87 Difference]: Start difference. First operand 49 states and 56 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) [2022-07-21 16:50:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:44,470 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2022-07-21 16:50:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:50:44,471 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 [2022-07-21 16:50:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:44,471 INFO L225 Difference]: With dead ends: 91 [2022-07-21 16:50:44,472 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 16:50:44,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:50:44,473 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 143 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:44,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 96 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:44,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 16:50:44,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2022-07-21 16:50:44,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-21 16:50:44,492 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 8 [2022-07-21 16:50:44,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:44,492 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-21 16:50:44,492 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) [2022-07-21 16:50:44,493 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-21 16:50:44,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:50:44,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:44,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:44,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 16:50:44,494 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:44,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:44,494 INFO L85 PathProgramCache]: Analyzing trace with hash -118766615, now seen corresponding path program 1 times [2022-07-21 16:50:44,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:44,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544026372] [2022-07-21 16:50:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:44,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:44,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:44,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544026372] [2022-07-21 16:50:44,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544026372] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:44,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:44,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:50:44,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831687814] [2022-07-21 16:50:44,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:44,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:50:44,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:44,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:50:44,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:44,580 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 5 states, 4 states have (on average 2.5) 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) [2022-07-21 16:50:44,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:44,629 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-07-21 16:50:44,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:50:44,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) 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 [2022-07-21 16:50:44,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:44,632 INFO L225 Difference]: With dead ends: 50 [2022-07-21 16:50:44,632 INFO L226 Difference]: Without dead ends: 50 [2022-07-21 16:50:44,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:50:44,637 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 142 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:44,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 37 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:44,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-21 16:50:44,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-21 16:50:44,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-07-21 16:50:44,650 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 10 [2022-07-21 16:50:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:44,651 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-07-21 16:50:44,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) 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) [2022-07-21 16:50:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-07-21 16:50:44,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:50:44,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:44,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:44,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 16:50:44,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:44,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:44,654 INFO L85 PathProgramCache]: Analyzing trace with hash -118766563, now seen corresponding path program 1 times [2022-07-21 16:50:44,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:44,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112350281] [2022-07-21 16:50:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:44,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:44,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112350281] [2022-07-21 16:50:44,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112350281] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:44,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:44,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:50:44,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424852886] [2022-07-21 16:50:44,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:44,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:50:44,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:44,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:50:44,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:44,685 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:44,712 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2022-07-21 16:50:44,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:50:44,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-21 16:50:44,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:44,715 INFO L225 Difference]: With dead ends: 91 [2022-07-21 16:50:44,715 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 16:50:44,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:44,718 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 41 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:44,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 141 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:44,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 16:50:44,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2022-07-21 16:50:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-07-21 16:50:44,724 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 10 [2022-07-21 16:50:44,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:44,724 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-07-21 16:50:44,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-07-21 16:50:44,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:50:44,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:44,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:44,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 16:50:44,725 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:44,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:44,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1656240799, now seen corresponding path program 1 times [2022-07-21 16:50:44,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:44,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058324505] [2022-07-21 16:50:44,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:44,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:44,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:44,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058324505] [2022-07-21 16:50:44,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058324505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:44,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:44,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:50:44,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445579259] [2022-07-21 16:50:44,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:44,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:50:44,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:50:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:44,758 INFO L87 Difference]: Start difference. First operand 60 states and 72 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) [2022-07-21 16:50:44,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:44,813 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2022-07-21 16:50:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:50:44,814 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 [2022-07-21 16:50:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:44,815 INFO L225 Difference]: With dead ends: 129 [2022-07-21 16:50:44,815 INFO L226 Difference]: Without dead ends: 129 [2022-07-21 16:50:44,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:50:44,816 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 125 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:44,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 165 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-21 16:50:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 60. [2022-07-21 16:50:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-07-21 16:50:44,819 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 10 [2022-07-21 16:50:44,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:44,819 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-07-21 16:50:44,820 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) [2022-07-21 16:50:44,820 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-07-21 16:50:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 16:50:44,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:44,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:44,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 16:50:44,821 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:44,821 INFO L85 PathProgramCache]: Analyzing trace with hash 613202234, now seen corresponding path program 1 times [2022-07-21 16:50:44,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:44,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841985832] [2022-07-21 16:50:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:44,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:44,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:44,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841985832] [2022-07-21 16:50:44,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841985832] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:44,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:44,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:50:44,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032388960] [2022-07-21 16:50:44,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:44,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:50:44,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:44,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:50:44,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:50:44,842 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:44,858 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2022-07-21 16:50:44,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:50:44,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-21 16:50:44,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:44,859 INFO L225 Difference]: With dead ends: 58 [2022-07-21 16:50:44,859 INFO L226 Difference]: Without dead ends: 58 [2022-07-21 16:50:44,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:50:44,859 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 39 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 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 [2022-07-21 16:50:44,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:44,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-21 16:50:44,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-07-21 16:50:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 57 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) [2022-07-21 16:50:44,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-07-21 16:50:44,862 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 11 [2022-07-21 16:50:44,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:44,863 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-07-21 16:50:44,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-07-21 16:50:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 16:50:44,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:44,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:44,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 16:50:44,864 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:44,864 INFO L85 PathProgramCache]: Analyzing trace with hash 613202235, now seen corresponding path program 1 times [2022-07-21 16:50:44,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:44,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486152519] [2022-07-21 16:50:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:44,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:44,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:44,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486152519] [2022-07-21 16:50:44,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486152519] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:44,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:44,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:50:44,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718042641] [2022-07-21 16:50:44,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:44,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:50:44,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:44,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:50:44,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:44,896 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:44,916 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-07-21 16:50:44,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:50:44,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-21 16:50:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:44,917 INFO L225 Difference]: With dead ends: 57 [2022-07-21 16:50:44,917 INFO L226 Difference]: Without dead ends: 57 [2022-07-21 16:50:44,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:44,918 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 46 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:44,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:44,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-21 16:50:44,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-21 16:50:44,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-07-21 16:50:44,920 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 11 [2022-07-21 16:50:44,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:44,921 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-07-21 16:50:44,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,921 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-07-21 16:50:44,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 16:50:44,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:44,922 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:44,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 16:50:44,922 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:44,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:44,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2022-07-21 16:50:44,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:44,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597627349] [2022-07-21 16:50:44,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:44,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:44,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:44,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597627349] [2022-07-21 16:50:44,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597627349] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:44,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906831371] [2022-07-21 16:50:44,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:44,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:44,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:44,999 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:50:45,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 16:50:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:45,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 16:50:45,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:45,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:50:45,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:50:45,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:50:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:45,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:45,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:50:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:45,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906831371] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:45,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:45,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-07-21 16:50:45,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399006405] [2022-07-21 16:50:45,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:45,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 16:50:45,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:45,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 16:50:45,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-21 16:50:45,445 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:45,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:45,605 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2022-07-21 16:50:45,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:50:45,607 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-07-21 16:50:45,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:45,607 INFO L225 Difference]: With dead ends: 128 [2022-07-21 16:50:45,607 INFO L226 Difference]: Without dead ends: 128 [2022-07-21 16:50:45,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-07-21 16:50:45,608 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 162 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:45,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 285 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:45,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-21 16:50:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 53. [2022-07-21 16:50:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.5365853658536586) 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) [2022-07-21 16:50:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-07-21 16:50:45,618 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 12 [2022-07-21 16:50:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:45,618 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-07-21 16:50:45,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-07-21 16:50:45,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:50:45,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:45,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:45,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 16:50:45,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 16:50:45,844 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:45,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:45,844 INFO L85 PathProgramCache]: Analyzing trace with hash 876828511, now seen corresponding path program 1 times [2022-07-21 16:50:45,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:45,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11497878] [2022-07-21 16:50:45,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:45,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:45,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:45,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11497878] [2022-07-21 16:50:45,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11497878] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:45,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:45,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:50:45,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263679322] [2022-07-21 16:50:45,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:45,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:50:45,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:45,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:50:45,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:45,887 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:45,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:45,920 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-07-21 16:50:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:50:45,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 16:50:45,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:45,926 INFO L225 Difference]: With dead ends: 49 [2022-07-21 16:50:45,926 INFO L226 Difference]: Without dead ends: 49 [2022-07-21 16:50:45,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:45,927 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:45,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 49 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:45,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-21 16:50:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-21 16:50:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-07-21 16:50:45,931 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 13 [2022-07-21 16:50:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:45,931 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-07-21 16:50:45,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-07-21 16:50:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:50:45,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:45,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:45,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 16:50:45,933 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:45,934 INFO L85 PathProgramCache]: Analyzing trace with hash 876828512, now seen corresponding path program 1 times [2022-07-21 16:50:45,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:45,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749080185] [2022-07-21 16:50:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:45,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:45,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:45,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749080185] [2022-07-21 16:50:45,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749080185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:45,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:45,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:50:45,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656394214] [2022-07-21 16:50:45,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:45,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 16:50:45,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:45,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 16:50:45,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:50:45,981 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:46,046 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-07-21 16:50:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:50:46,047 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 16:50:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:46,047 INFO L225 Difference]: With dead ends: 72 [2022-07-21 16:50:46,048 INFO L226 Difference]: Without dead ends: 72 [2022-07-21 16:50:46,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:50:46,048 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 185 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:46,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 62 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-21 16:50:46,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2022-07-21 16:50:46,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 59 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) [2022-07-21 16:50:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2022-07-21 16:50:46,051 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 13 [2022-07-21 16:50:46,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:46,051 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2022-07-21 16:50:46,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2022-07-21 16:50:46,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 16:50:46,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:46,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:46,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 16:50:46,052 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:46,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:46,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125411, now seen corresponding path program 1 times [2022-07-21 16:50:46,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:46,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65933579] [2022-07-21 16:50:46,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:46,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:46,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:46,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65933579] [2022-07-21 16:50:46,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65933579] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:46,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:46,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:50:46,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917488617] [2022-07-21 16:50:46,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:46,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:50:46,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:46,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:50:46,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:46,091 INFO L87 Difference]: Start difference. First operand 60 states and 76 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) [2022-07-21 16:50:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:46,155 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2022-07-21 16:50:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:50:46,155 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 [2022-07-21 16:50:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:46,157 INFO L225 Difference]: With dead ends: 99 [2022-07-21 16:50:46,157 INFO L226 Difference]: Without dead ends: 99 [2022-07-21 16:50:46,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:50:46,157 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:46,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 80 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-21 16:50:46,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2022-07-21 16:50:46,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.462962962962963) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-07-21 16:50:46,160 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 14 [2022-07-21 16:50:46,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:46,160 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-07-21 16:50:46,160 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) [2022-07-21 16:50:46,161 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-07-21 16:50:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 16:50:46,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:46,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:46,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 16:50:46,161 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:46,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:46,162 INFO L85 PathProgramCache]: Analyzing trace with hash 818610617, now seen corresponding path program 1 times [2022-07-21 16:50:46,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:46,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583800634] [2022-07-21 16:50:46,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:46,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:46,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:46,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583800634] [2022-07-21 16:50:46,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583800634] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:46,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555424982] [2022-07-21 16:50:46,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:46,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:46,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:46,244 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:50:46,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 16:50:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:46,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 16:50:46,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:46,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:50:46,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:50:46,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:50:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:46,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:46,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:50:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:46,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555424982] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:46,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:46,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-07-21 16:50:46,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153435127] [2022-07-21 16:50:46,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:46,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 16:50:46,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:46,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 16:50:46,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-21 16:50:46,508 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:46,665 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-07-21 16:50:46,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 16:50:46,666 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-21 16:50:46,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:46,667 INFO L225 Difference]: With dead ends: 92 [2022-07-21 16:50:46,667 INFO L226 Difference]: Without dead ends: 92 [2022-07-21 16:50:46,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-07-21 16:50:46,667 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 458 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:46,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 201 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:46,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-21 16:50:46,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2022-07-21 16:50:46,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 58 states have (on average 1.4655172413793103) internal successors, (85), 64 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2022-07-21 16:50:46,670 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 15 [2022-07-21 16:50:46,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:46,671 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2022-07-21 16:50:46,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,671 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2022-07-21 16:50:46,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 16:50:46,672 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:46,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:46,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:46,887 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,SelfDestructingSolverStorable13 [2022-07-21 16:50:46,887 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:46,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:46,888 INFO L85 PathProgramCache]: Analyzing trace with hash 705742569, now seen corresponding path program 1 times [2022-07-21 16:50:46,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:46,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940458972] [2022-07-21 16:50:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:46,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:46,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:46,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940458972] [2022-07-21 16:50:46,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940458972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:46,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:46,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:50:46,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54608452] [2022-07-21 16:50:46,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:46,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:50:46,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:46,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:50:46,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:46,914 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:46,943 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2022-07-21 16:50:46,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:50:46,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-21 16:50:46,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:46,944 INFO L225 Difference]: With dead ends: 66 [2022-07-21 16:50:46,944 INFO L226 Difference]: Without dead ends: 66 [2022-07-21 16:50:46,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:50:46,945 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 54 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:46,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 75 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:46,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-21 16:50:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-07-21 16:50:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 63 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) [2022-07-21 16:50:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2022-07-21 16:50:46,947 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 17 [2022-07-21 16:50:46,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:46,947 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2022-07-21 16:50:46,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,947 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2022-07-21 16:50:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 16:50:46,948 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:46,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:46,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 16:50:46,948 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:46,948 INFO L85 PathProgramCache]: Analyzing trace with hash 705742570, now seen corresponding path program 1 times [2022-07-21 16:50:46,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:46,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931912277] [2022-07-21 16:50:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:46,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:46,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:46,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931912277] [2022-07-21 16:50:46,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931912277] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:46,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:46,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 16:50:46,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869915207] [2022-07-21 16:50:46,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:46,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:50:46,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:46,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:50:46,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:50:46,992 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:47,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:47,040 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2022-07-21 16:50:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:50:47,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-21 16:50:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:47,041 INFO L225 Difference]: With dead ends: 87 [2022-07-21 16:50:47,041 INFO L226 Difference]: Without dead ends: 87 [2022-07-21 16:50:47,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:50:47,041 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 179 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:47,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 84 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:47,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-21 16:50:47,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2022-07-21 16:50:47,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 72 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) [2022-07-21 16:50:47,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2022-07-21 16:50:47,048 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 17 [2022-07-21 16:50:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:47,048 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2022-07-21 16:50:47,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2022-07-21 16:50:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 16:50:47,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:47,049 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:47,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 16:50:47,049 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:47,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash 705788370, now seen corresponding path program 2 times [2022-07-21 16:50:47,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:47,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981495681] [2022-07-21 16:50:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:47,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:47,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:47,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981495681] [2022-07-21 16:50:47,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981495681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:47,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:47,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 16:50:47,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236304585] [2022-07-21 16:50:47,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:47,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:50:47,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:47,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:50:47,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:50:47,119 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:47,249 INFO L93 Difference]: Finished difference Result 151 states and 184 transitions. [2022-07-21 16:50:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:50:47,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-21 16:50:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:47,250 INFO L225 Difference]: With dead ends: 151 [2022-07-21 16:50:47,250 INFO L226 Difference]: Without dead ends: 151 [2022-07-21 16:50:47,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-07-21 16:50:47,251 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:47,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 193 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-21 16:50:47,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 81. [2022-07-21 16:50:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.3866666666666667) internal successors, (104), 80 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) [2022-07-21 16:50:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2022-07-21 16:50:47,254 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 17 [2022-07-21 16:50:47,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:47,254 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2022-07-21 16:50:47,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:47,255 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2022-07-21 16:50:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 16:50:47,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:47,255 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:47,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 16:50:47,256 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:47,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:47,256 INFO L85 PathProgramCache]: Analyzing trace with hash -287041178, now seen corresponding path program 1 times [2022-07-21 16:50:47,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:47,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941195984] [2022-07-21 16:50:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:47,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:47,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:47,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941195984] [2022-07-21 16:50:47,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941195984] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:47,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756139841] [2022-07-21 16:50:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:47,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:47,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:47,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:50:47,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 16:50:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:47,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 16:50:47,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:47,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:47,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756139841] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:47,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:47,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-07-21 16:50:47,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222073561] [2022-07-21 16:50:47,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:47,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 16:50:47,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:47,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 16:50:47,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-07-21 16:50:47,468 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:47,617 INFO L93 Difference]: Finished difference Result 278 states and 358 transitions. [2022-07-21 16:50:47,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 16:50:47,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2022-07-21 16:50:47,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:47,620 INFO L225 Difference]: With dead ends: 278 [2022-07-21 16:50:47,620 INFO L226 Difference]: Without dead ends: 278 [2022-07-21 16:50:47,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2022-07-21 16:50:47,621 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 534 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:47,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 272 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-07-21 16:50:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 90. [2022-07-21 16:50:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.369047619047619) internal successors, (115), 89 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2022-07-21 16:50:47,625 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 18 [2022-07-21 16:50:47,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:47,625 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2022-07-21 16:50:47,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2022-07-21 16:50:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 16:50:47,626 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:47,626 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:47,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:47,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 16:50:47,843 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:47,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash -440236817, now seen corresponding path program 1 times [2022-07-21 16:50:47,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:47,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57659087] [2022-07-21 16:50:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:47,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:47,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:47,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57659087] [2022-07-21 16:50:47,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57659087] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:47,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873427689] [2022-07-21 16:50:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:47,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:47,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:47,935 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:50:47,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 16:50:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:47,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 16:50:47,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:48,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:50:48,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:50:48,003 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 [2022-07-21 16:50:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:48,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:48,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:50:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:48,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873427689] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:48,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:48,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-07-21 16:50:48,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764738151] [2022-07-21 16:50:48,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:48,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 16:50:48,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:48,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 16:50:48,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-21 16:50:48,220 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:48,516 INFO L93 Difference]: Finished difference Result 182 states and 231 transitions. [2022-07-21 16:50:48,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:50:48,516 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 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 21 [2022-07-21 16:50:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:48,517 INFO L225 Difference]: With dead ends: 182 [2022-07-21 16:50:48,517 INFO L226 Difference]: Without dead ends: 182 [2022-07-21 16:50:48,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-07-21 16:50:48,518 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 371 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:48,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 521 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:50:48,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-21 16:50:48,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 102. [2022-07-21 16:50:48,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 101 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) [2022-07-21 16:50:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2022-07-21 16:50:48,520 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 21 [2022-07-21 16:50:48,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:48,520 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2022-07-21 16:50:48,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:48,520 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2022-07-21 16:50:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 16:50:48,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:48,520 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] [2022-07-21 16:50:48,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:48,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:48,727 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:48,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:48,728 INFO L85 PathProgramCache]: Analyzing trace with hash 35317445, now seen corresponding path program 1 times [2022-07-21 16:50:48,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:48,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69353961] [2022-07-21 16:50:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:48,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:48,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:48,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69353961] [2022-07-21 16:50:48,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69353961] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:48,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:48,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:50:48,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794129561] [2022-07-21 16:50:48,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:48,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:50:48,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:48,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:50:48,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:48,751 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:48,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:48,789 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2022-07-21 16:50:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:50:48,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 [2022-07-21 16:50:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:48,790 INFO L225 Difference]: With dead ends: 108 [2022-07-21 16:50:48,790 INFO L226 Difference]: Without dead ends: 108 [2022-07-21 16:50:48,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 16:50:48,790 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 67 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:48,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 105 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:48,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-21 16:50:48,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2022-07-21 16:50:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 94 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2022-07-21 16:50:48,792 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 22 [2022-07-21 16:50:48,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:48,792 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2022-07-21 16:50:48,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:48,792 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2022-07-21 16:50:48,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 16:50:48,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:48,793 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:48,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 16:50:48,793 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:48,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:48,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1863163671, now seen corresponding path program 2 times [2022-07-21 16:50:48,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:48,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740030383] [2022-07-21 16:50:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:48,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:50:48,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:48,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740030383] [2022-07-21 16:50:48,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740030383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:48,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089310785] [2022-07-21 16:50:48,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:50:48,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:48,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:48,856 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:50:48,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 16:50:48,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:50:48,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:48,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 16:50:48,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:48,914 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:50:48,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:50:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:50:48,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:50:49,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089310785] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:49,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:49,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 16:50:49,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113512976] [2022-07-21 16:50:49,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:49,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 16:50:49,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:49,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 16:50:49,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-21 16:50:49,096 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:49,202 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2022-07-21 16:50:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:50:49,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-21 16:50:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:49,203 INFO L225 Difference]: With dead ends: 200 [2022-07-21 16:50:49,203 INFO L226 Difference]: Without dead ends: 200 [2022-07-21 16:50:49,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-21 16:50:49,204 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 231 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:49,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 178 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:49,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-21 16:50:49,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 92. [2022-07-21 16:50:49,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 91 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2022-07-21 16:50:49,206 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 22 [2022-07-21 16:50:49,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:49,206 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2022-07-21 16:50:49,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:49,207 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2022-07-21 16:50:49,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 16:50:49,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:49,207 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:49,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:49,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:49,419 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:49,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:49,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2134181768, now seen corresponding path program 2 times [2022-07-21 16:50:49,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:49,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073699051] [2022-07-21 16:50:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:49,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:49,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:49,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073699051] [2022-07-21 16:50:49,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073699051] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:49,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948190134] [2022-07-21 16:50:49,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:50:49,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:49,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:49,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:50:49,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 16:50:49,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:50:49,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:49,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-21 16:50:49,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:49,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:50:49,711 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 [2022-07-21 16:50:49,744 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 [2022-07-21 16:50:49,832 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-21 16:50:49,833 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 [2022-07-21 16:50:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:49,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:49,893 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_241 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_241) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2022-07-21 16:50:49,909 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:50:49,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-21 16:50:49,914 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:50:49,914 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 [2022-07-21 16:50:49,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:50:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:50,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948190134] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:50,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:50,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-07-21 16:50:50,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732592990] [2022-07-21 16:50:50,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:50,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 16:50:50,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:50,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 16:50:50,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=473, Unknown=1, NotChecked=44, Total=600 [2022-07-21 16:50:50,016 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:50,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:50,358 INFO L93 Difference]: Finished difference Result 187 states and 223 transitions. [2022-07-21 16:50:50,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 16:50:50,360 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 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 23 [2022-07-21 16:50:50,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:50,361 INFO L225 Difference]: With dead ends: 187 [2022-07-21 16:50:50,361 INFO L226 Difference]: Without dead ends: 187 [2022-07-21 16:50:50,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=948, Unknown=1, NotChecked=64, Total=1190 [2022-07-21 16:50:50,362 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 143 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:50,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 664 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 290 Invalid, 0 Unknown, 147 Unchecked, 0.1s Time] [2022-07-21 16:50:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-21 16:50:50,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 103. [2022-07-21 16:50:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.2959183673469388) internal successors, (127), 102 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-07-21 16:50:50,364 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 23 [2022-07-21 16:50:50,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:50,364 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-07-21 16:50:50,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:50,364 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-07-21 16:50:50,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 16:50:50,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:50,365 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:50,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:50,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:50,566 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:50,566 INFO L85 PathProgramCache]: Analyzing trace with hash 79040412, now seen corresponding path program 1 times [2022-07-21 16:50:50,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:50,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060176734] [2022-07-21 16:50:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:50,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:50,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:50,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:50,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060176734] [2022-07-21 16:50:50,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060176734] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:50,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067717790] [2022-07-21 16:50:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:50,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:50,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:50,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:50:50,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 16:50:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:50,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 16:50:50,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:50,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:50,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067717790] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:50,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:50,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-07-21 16:50:50,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742281188] [2022-07-21 16:50:50,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:50,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 16:50:50,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 16:50:50,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:50:50,731 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:50,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:50,789 INFO L93 Difference]: Finished difference Result 205 states and 243 transitions. [2022-07-21 16:50:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:50:50,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-21 16:50:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:50,790 INFO L225 Difference]: With dead ends: 205 [2022-07-21 16:50:50,790 INFO L226 Difference]: Without dead ends: 205 [2022-07-21 16:50:50,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:50:50,791 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 57 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:50,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 202 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:50,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-07-21 16:50:50,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 176. [2022-07-21 16:50:50,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.2514619883040936) internal successors, (214), 175 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:50,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 214 transitions. [2022-07-21 16:50:50,794 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 214 transitions. Word has length 23 [2022-07-21 16:50:50,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:50,794 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 214 transitions. [2022-07-21 16:50:50,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:50,794 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 214 transitions. [2022-07-21 16:50:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 16:50:50,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:50,795 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:50,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:51,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:51,007 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:51,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:51,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1609903330, now seen corresponding path program 1 times [2022-07-21 16:50:51,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:51,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855458058] [2022-07-21 16:50:51,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:51,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:51,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:51,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855458058] [2022-07-21 16:50:51,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855458058] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:51,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:51,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 16:50:51,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141208280] [2022-07-21 16:50:51,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:51,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 16:50:51,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:51,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 16:50:51,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:50:51,072 INFO L87 Difference]: Start difference. First operand 176 states and 214 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:51,162 INFO L93 Difference]: Finished difference Result 260 states and 307 transitions. [2022-07-21 16:50:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 16:50:51,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-21 16:50:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:51,163 INFO L225 Difference]: With dead ends: 260 [2022-07-21 16:50:51,163 INFO L226 Difference]: Without dead ends: 260 [2022-07-21 16:50:51,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-07-21 16:50:51,164 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:51,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 252 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:51,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-21 16:50:51,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 191. [2022-07-21 16:50:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.2419354838709677) internal successors, (231), 190 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 231 transitions. [2022-07-21 16:50:51,167 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 231 transitions. Word has length 23 [2022-07-21 16:50:51,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:51,167 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 231 transitions. [2022-07-21 16:50:51,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:51,168 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 231 transitions. [2022-07-21 16:50:51,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 16:50:51,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:51,168 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:51,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 16:50:51,168 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:51,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1867415516, now seen corresponding path program 1 times [2022-07-21 16:50:51,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:51,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110171705] [2022-07-21 16:50:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:51,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:51,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:51,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110171705] [2022-07-21 16:50:51,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110171705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:51,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:51,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 16:50:51,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014960175] [2022-07-21 16:50:51,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:51,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:50:51,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:51,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:50:51,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:50:51,267 INFO L87 Difference]: Start difference. First operand 191 states and 231 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:51,385 INFO L93 Difference]: Finished difference Result 223 states and 263 transitions. [2022-07-21 16:50:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:50:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-21 16:50:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:51,387 INFO L225 Difference]: With dead ends: 223 [2022-07-21 16:50:51,387 INFO L226 Difference]: Without dead ends: 223 [2022-07-21 16:50:51,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-07-21 16:50:51,387 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 106 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:51,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 182 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:51,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-21 16:50:51,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 181. [2022-07-21 16:50:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.2556818181818181) internal successors, (221), 180 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:51,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 221 transitions. [2022-07-21 16:50:51,390 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 221 transitions. Word has length 23 [2022-07-21 16:50:51,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:51,390 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 221 transitions. [2022-07-21 16:50:51,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 221 transitions. [2022-07-21 16:50:51,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 16:50:51,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:51,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:51,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-21 16:50:51,391 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:51,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:51,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1387621483, now seen corresponding path program 1 times [2022-07-21 16:50:51,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:51,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235440667] [2022-07-21 16:50:51,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:51,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:51,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:51,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235440667] [2022-07-21 16:50:51,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235440667] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:51,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:51,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:50:51,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253986763] [2022-07-21 16:50:51,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:51,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:50:51,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:51,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:50:51,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:51,424 INFO L87 Difference]: Start difference. First operand 181 states and 221 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 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) [2022-07-21 16:50:51,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:51,438 INFO L93 Difference]: Finished difference Result 180 states and 220 transitions. [2022-07-21 16:50:51,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:50:51,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 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 25 [2022-07-21 16:50:51,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:51,439 INFO L225 Difference]: With dead ends: 180 [2022-07-21 16:50:51,439 INFO L226 Difference]: Without dead ends: 133 [2022-07-21 16:50:51,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:51,440 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:51,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:51,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-21 16:50:51,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-07-21 16:50:51,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 129 states have (on average 1.178294573643411) internal successors, (152), 132 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:51,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2022-07-21 16:50:51,442 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 25 [2022-07-21 16:50:51,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:51,442 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2022-07-21 16:50:51,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 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) [2022-07-21 16:50:51,443 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2022-07-21 16:50:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 16:50:51,443 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:51,443 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:51,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-21 16:50:51,443 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:51,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:51,444 INFO L85 PathProgramCache]: Analyzing trace with hash -725186331, now seen corresponding path program 3 times [2022-07-21 16:50:51,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:51,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195172320] [2022-07-21 16:50:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:51,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:51,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:51,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195172320] [2022-07-21 16:50:51,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195172320] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:51,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994003280] [2022-07-21 16:50:51,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:50:51,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:51,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:51,522 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:50:51,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 16:50:51,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 16:50:51,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:51,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 16:50:51,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:51,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:50:51,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:50:51,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:50:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:51,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:51,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:50:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:51,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994003280] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:51,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:51,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-07-21 16:50:51,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526021562] [2022-07-21 16:50:51,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:51,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 16:50:51,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 16:50:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-07-21 16:50:51,948 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 26 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:52,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:52,330 INFO L93 Difference]: Finished difference Result 208 states and 231 transitions. [2022-07-21 16:50:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:50:52,331 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-21 16:50:52,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:52,332 INFO L225 Difference]: With dead ends: 208 [2022-07-21 16:50:52,332 INFO L226 Difference]: Without dead ends: 198 [2022-07-21 16:50:52,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 16:50:52,332 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 288 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:52,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 318 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:50:52,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-21 16:50:52,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 148. [2022-07-21 16:50:52,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.1736111111111112) internal successors, (169), 147 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) [2022-07-21 16:50:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2022-07-21 16:50:52,335 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 27 [2022-07-21 16:50:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:52,335 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2022-07-21 16:50:52,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2022-07-21 16:50:52,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 16:50:52,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:52,336 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:52,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:52,536 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,SelfDestructingSolverStorable26 [2022-07-21 16:50:52,537 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:52,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:52,537 INFO L85 PathProgramCache]: Analyzing trace with hash -424812231, now seen corresponding path program 1 times [2022-07-21 16:50:52,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:52,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759167959] [2022-07-21 16:50:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:52,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:52,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:52,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759167959] [2022-07-21 16:50:52,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759167959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:52,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:52,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 16:50:52,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989978592] [2022-07-21 16:50:52,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:52,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:50:52,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:52,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:50:52,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:50:52,619 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2022-07-21 16:50:52,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:52,726 INFO L93 Difference]: Finished difference Result 218 states and 243 transitions. [2022-07-21 16:50:52,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:50:52,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 [2022-07-21 16:50:52,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:52,728 INFO L225 Difference]: With dead ends: 218 [2022-07-21 16:50:52,728 INFO L226 Difference]: Without dead ends: 181 [2022-07-21 16:50:52,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-07-21 16:50:52,728 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 73 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:52,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 188 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-21 16:50:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 150. [2022-07-21 16:50:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.178082191780822) internal successors, (172), 149 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2022-07-21 16:50:52,731 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 27 [2022-07-21 16:50:52,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:52,732 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2022-07-21 16:50:52,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2022-07-21 16:50:52,732 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2022-07-21 16:50:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 16:50:52,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:52,733 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:52,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-21 16:50:52,733 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1119361538, now seen corresponding path program 4 times [2022-07-21 16:50:52,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:52,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095002331] [2022-07-21 16:50:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:52,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:52,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:52,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095002331] [2022-07-21 16:50:52,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095002331] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:52,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805588017] [2022-07-21 16:50:52,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:50:52,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:52,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:52,868 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:50:52,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 16:50:52,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:50:52,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:52,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-21 16:50:52,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:52,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:50:52,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:50:53,097 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 [2022-07-21 16:50:53,138 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 [2022-07-21 16:50:53,319 INFO L356 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2022-07-21 16:50:53,320 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 28 treesize of output 20 [2022-07-21 16:50:53,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:50:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:53,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:53,519 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:50:53,519 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 [2022-07-21 16:50:53,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:50:53,529 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:50:53,529 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 [2022-07-21 16:50:53,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:50:53,534 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 [2022-07-21 16:50:53,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:50:53,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:50:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:53,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805588017] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:53,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:53,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 34 [2022-07-21 16:50:53,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803137162] [2022-07-21 16:50:53,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:53,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 16:50:53,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:53,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 16:50:53,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=995, Unknown=1, NotChecked=0, Total=1122 [2022-07-21 16:50:53,836 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 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) [2022-07-21 16:50:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:54,646 INFO L93 Difference]: Finished difference Result 278 states and 308 transitions. [2022-07-21 16:50:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 16:50:54,653 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 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 29 [2022-07-21 16:50:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:54,653 INFO L225 Difference]: With dead ends: 278 [2022-07-21 16:50:54,653 INFO L226 Difference]: Without dead ends: 241 [2022-07-21 16:50:54,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=330, Invalid=2425, Unknown=1, NotChecked=0, Total=2756 [2022-07-21 16:50:54,655 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 163 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:54,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 720 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 560 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-07-21 16:50:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-21 16:50:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 173. [2022-07-21 16:50:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.1715976331360947) internal successors, (198), 172 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 198 transitions. [2022-07-21 16:50:54,658 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 198 transitions. Word has length 29 [2022-07-21 16:50:54,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:54,658 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 198 transitions. [2022-07-21 16:50:54,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 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) [2022-07-21 16:50:54,658 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 198 transitions. [2022-07-21 16:50:54,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 16:50:54,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:54,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:54,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:54,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-21 16:50:54,882 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:54,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:54,882 INFO L85 PathProgramCache]: Analyzing trace with hash 515027158, now seen corresponding path program 1 times [2022-07-21 16:50:54,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:54,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371444735] [2022-07-21 16:50:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:54,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:54,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:54,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371444735] [2022-07-21 16:50:54,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371444735] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:54,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952293944] [2022-07-21 16:50:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:54,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:54,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:54,971 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:50:54,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 16:50:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:55,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 16:50:55,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:55,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:55,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:50:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:55,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952293944] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:55,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:55,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-07-21 16:50:55,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280534544] [2022-07-21 16:50:55,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:55,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 16:50:55,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:55,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 16:50:55,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-07-21 16:50:55,253 INFO L87 Difference]: Start difference. First operand 173 states and 198 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:55,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:55,529 INFO L93 Difference]: Finished difference Result 212 states and 235 transitions. [2022-07-21 16:50:55,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:50:55,529 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 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) Word has length 31 [2022-07-21 16:50:55,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:55,530 INFO L225 Difference]: With dead ends: 212 [2022-07-21 16:50:55,530 INFO L226 Difference]: Without dead ends: 212 [2022-07-21 16:50:55,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-07-21 16:50:55,531 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 205 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:55,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 241 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-21 16:50:55,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 191. [2022-07-21 16:50:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 187 states have (on average 1.1550802139037433) internal successors, (216), 190 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 216 transitions. [2022-07-21 16:50:55,535 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 216 transitions. Word has length 31 [2022-07-21 16:50:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:55,535 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 216 transitions. [2022-07-21 16:50:55,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 216 transitions. [2022-07-21 16:50:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-21 16:50:55,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:55,536 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:55,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:55,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:55,752 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:55,753 INFO L85 PathProgramCache]: Analyzing trace with hash 496512411, now seen corresponding path program 5 times [2022-07-21 16:50:55,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:55,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996568792] [2022-07-21 16:50:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:55,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:55,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:55,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996568792] [2022-07-21 16:50:55,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996568792] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:55,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018006581] [2022-07-21 16:50:55,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:50:55,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:55,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:55,852 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:50:55,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 16:50:55,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-21 16:50:55,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:55,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 16:50:55,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:55,963 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:50:55,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:50:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:56,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:56,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018006581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:56,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:56,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 15] total 38 [2022-07-21 16:50:56,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726733173] [2022-07-21 16:50:56,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:56,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 16:50:56,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:56,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 16:50:56,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 16:50:56,926 INFO L87 Difference]: Start difference. First operand 191 states and 216 transitions. Second operand has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:57,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:57,796 INFO L93 Difference]: Finished difference Result 279 states and 307 transitions. [2022-07-21 16:50:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 16:50:57,797 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-21 16:50:57,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:57,798 INFO L225 Difference]: With dead ends: 279 [2022-07-21 16:50:57,798 INFO L226 Difference]: Without dead ends: 269 [2022-07-21 16:50:57,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=471, Invalid=3069, Unknown=0, NotChecked=0, Total=3540 [2022-07-21 16:50:57,799 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 183 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:57,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 943 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 517 Invalid, 0 Unknown, 380 Unchecked, 0.2s Time] [2022-07-21 16:50:57,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-07-21 16:50:57,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 212. [2022-07-21 16:50:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 208 states have (on average 1.1490384615384615) internal successors, (239), 211 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 239 transitions. [2022-07-21 16:50:57,803 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 239 transitions. Word has length 33 [2022-07-21 16:50:57,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:57,803 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 239 transitions. [2022-07-21 16:50:57,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 239 transitions. [2022-07-21 16:50:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 16:50:57,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:57,804 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:57,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:58,020 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,SelfDestructingSolverStorable30 [2022-07-21 16:50:58,021 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:58,021 INFO L85 PathProgramCache]: Analyzing trace with hash 407057716, now seen corresponding path program 6 times [2022-07-21 16:50:58,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:58,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106531708] [2022-07-21 16:50:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:58,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:58,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:58,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106531708] [2022-07-21 16:50:58,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106531708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:58,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638750195] [2022-07-21 16:50:58,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:50:58,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:58,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:58,182 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:50:58,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 16:50:58,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-21 16:50:58,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:58,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-21 16:50:58,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:58,297 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:50:58,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:50:58,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-21 16:50:58,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:50:58,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 16:50:59,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:50:59,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:50:59,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:50:59,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 14 [2022-07-21 16:50:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:59,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:59,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:50:59,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 111 [2022-07-21 16:51:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:00,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638750195] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:00,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:00,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 16] total 42 [2022-07-21 16:51:00,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999016117] [2022-07-21 16:51:00,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:00,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 16:51:00,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:00,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 16:51:00,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2022-07-21 16:51:00,338 INFO L87 Difference]: Start difference. First operand 212 states and 239 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:02,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:02,103 INFO L93 Difference]: Finished difference Result 429 states and 469 transitions. [2022-07-21 16:51:02,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-21 16:51:02,104 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 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 35 [2022-07-21 16:51:02,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:02,105 INFO L225 Difference]: With dead ends: 429 [2022-07-21 16:51:02,105 INFO L226 Difference]: Without dead ends: 384 [2022-07-21 16:51:02,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=623, Invalid=5539, Unknown=0, NotChecked=0, Total=6162 [2022-07-21 16:51:02,106 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 463 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:02,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 964 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 822 Invalid, 0 Unknown, 140 Unchecked, 0.4s Time] [2022-07-21 16:51:02,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-07-21 16:51:02,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 235. [2022-07-21 16:51:02,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 231 states have (on average 1.147186147186147) internal successors, (265), 234 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:02,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 265 transitions. [2022-07-21 16:51:02,112 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 265 transitions. Word has length 35 [2022-07-21 16:51:02,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:02,112 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 265 transitions. [2022-07-21 16:51:02,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:02,113 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 265 transitions. [2022-07-21 16:51:02,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 16:51:02,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:02,113 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:02,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:02,315 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,SelfDestructingSolverStorable31 [2022-07-21 16:51:02,315 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:02,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1933322104, now seen corresponding path program 2 times [2022-07-21 16:51:02,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:02,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150949584] [2022-07-21 16:51:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:02,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:02,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:02,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150949584] [2022-07-21 16:51:02,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150949584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:02,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299619280] [2022-07-21 16:51:02,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:51:02,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:02,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:02,521 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:02,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 16:51:02,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:51:02,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:02,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-21 16:51:02,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:02,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:51:02,891 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-07-21 16:51:02,891 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 [2022-07-21 16:51:02,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:02,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:02,914 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 48 treesize of output 38 [2022-07-21 16:51:03,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:03,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:03,170 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:03,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2022-07-21 16:51:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:03,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:03,897 INFO L356 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2022-07-21 16:51:03,898 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 [2022-07-21 16:51:03,905 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:03,906 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 [2022-07-21 16:51:03,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:51:03,957 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 [2022-07-21 16:51:03,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:03,975 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:03,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 77 [2022-07-21 16:51:04,008 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 [2022-07-21 16:51:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:04,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299619280] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:04,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:04,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 50 [2022-07-21 16:51:04,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456897609] [2022-07-21 16:51:04,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:04,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-21 16:51:04,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:04,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-21 16:51:04,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2209, Unknown=4, NotChecked=0, Total=2450 [2022-07-21 16:51:04,176 INFO L87 Difference]: Start difference. First operand 235 states and 265 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:04,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:04,928 INFO L93 Difference]: Finished difference Result 266 states and 296 transitions. [2022-07-21 16:51:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 16:51:04,928 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-21 16:51:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:04,929 INFO L225 Difference]: With dead ends: 266 [2022-07-21 16:51:04,929 INFO L226 Difference]: Without dead ends: 254 [2022-07-21 16:51:04,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=502, Invalid=4464, Unknown=4, NotChecked=0, Total=4970 [2022-07-21 16:51:04,930 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:04,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 341 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 269 Invalid, 0 Unknown, 156 Unchecked, 0.1s Time] [2022-07-21 16:51:04,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-07-21 16:51:04,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 236. [2022-07-21 16:51:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 232 states have (on average 1.146551724137931) internal successors, (266), 235 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:04,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 266 transitions. [2022-07-21 16:51:04,933 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 266 transitions. Word has length 37 [2022-07-21 16:51:04,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:04,933 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 266 transitions. [2022-07-21 16:51:04,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:04,934 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 266 transitions. [2022-07-21 16:51:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 16:51:04,934 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:04,934 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:04,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:05,147 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,SelfDestructingSolverStorable32 [2022-07-21 16:51:05,147 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:05,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1211405073, now seen corresponding path program 7 times [2022-07-21 16:51:05,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:05,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62568086] [2022-07-21 16:51:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:05,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:05,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:05,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62568086] [2022-07-21 16:51:05,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62568086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:05,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030623431] [2022-07-21 16:51:05,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:51:05,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:05,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:05,302 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:05,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 16:51:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:05,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 16:51:05,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:05,411 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:51:05,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:51:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:06,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:06,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030623431] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:06,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:06,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2022-07-21 16:51:06,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615683427] [2022-07-21 16:51:06,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:06,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 16:51:06,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:06,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 16:51:06,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 16:51:06,589 INFO L87 Difference]: Start difference. First operand 236 states and 266 transitions. Second operand has 45 states, 44 states have (on average 2.522727272727273) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:07,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:07,958 INFO L93 Difference]: Finished difference Result 433 states and 470 transitions. [2022-07-21 16:51:07,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 16:51:07,958 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.522727272727273) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-21 16:51:07,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:07,959 INFO L225 Difference]: With dead ends: 433 [2022-07-21 16:51:07,959 INFO L226 Difference]: Without dead ends: 423 [2022-07-21 16:51:07,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=748, Invalid=5104, Unknown=0, NotChecked=0, Total=5852 [2022-07-21 16:51:07,960 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 388 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 509 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:07,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 1492 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1208 Invalid, 0 Unknown, 509 Unchecked, 0.4s Time] [2022-07-21 16:51:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-21 16:51:07,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 263. [2022-07-21 16:51:07,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.138996138996139) internal successors, (295), 262 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 295 transitions. [2022-07-21 16:51:07,964 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 295 transitions. Word has length 39 [2022-07-21 16:51:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:07,965 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 295 transitions. [2022-07-21 16:51:07,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.522727272727273) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:07,965 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 295 transitions. [2022-07-21 16:51:07,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 16:51:07,965 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:07,965 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-07-21 16:51:07,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:08,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:08,182 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:08,183 INFO L85 PathProgramCache]: Analyzing trace with hash -22467999, now seen corresponding path program 1 times [2022-07-21 16:51:08,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:08,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533754338] [2022-07-21 16:51:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:08,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:51:08,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:08,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533754338] [2022-07-21 16:51:08,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533754338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:08,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844987441] [2022-07-21 16:51:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:08,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:08,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:08,515 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:08,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 16:51:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:08,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 16:51:08,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:08,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:51:08,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:51:08,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 16:51:08,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:51:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:51:08,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:08,810 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_583 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_583) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2022-07-21 16:51:08,814 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_583 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_583) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2022-07-21 16:51:08,827 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_583 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_583) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0)) is different from false [2022-07-21 16:51:08,830 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:08,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:51:08,834 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:08,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:51:08,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:51:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-07-21 16:51:08,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844987441] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:08,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:08,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 31 [2022-07-21 16:51:08,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832643842] [2022-07-21 16:51:08,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:08,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 16:51:08,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:08,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 16:51:08,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=648, Unknown=3, NotChecked=162, Total=930 [2022-07-21 16:51:08,998 INFO L87 Difference]: Start difference. First operand 263 states and 295 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 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) [2022-07-21 16:51:09,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:09,435 INFO L93 Difference]: Finished difference Result 280 states and 311 transitions. [2022-07-21 16:51:09,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 16:51:09,436 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-21 16:51:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:09,436 INFO L225 Difference]: With dead ends: 280 [2022-07-21 16:51:09,436 INFO L226 Difference]: Without dead ends: 255 [2022-07-21 16:51:09,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=252, Invalid=1317, Unknown=3, NotChecked=234, Total=1806 [2022-07-21 16:51:09,437 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 104 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:09,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 334 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 377 Invalid, 0 Unknown, 165 Unchecked, 0.1s Time] [2022-07-21 16:51:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-21 16:51:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2022-07-21 16:51:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 248 states have (on average 1.1411290322580645) internal successors, (283), 251 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:09,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2022-07-21 16:51:09,446 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 39 [2022-07-21 16:51:09,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:09,446 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2022-07-21 16:51:09,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 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) [2022-07-21 16:51:09,446 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2022-07-21 16:51:09,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 16:51:09,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:09,447 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:09,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-21 16:51:09,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:09,659 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:09,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:09,660 INFO L85 PathProgramCache]: Analyzing trace with hash 224138538, now seen corresponding path program 8 times [2022-07-21 16:51:09,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:09,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712459076] [2022-07-21 16:51:09,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:09,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:09,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:09,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712459076] [2022-07-21 16:51:09,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712459076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:09,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174656795] [2022-07-21 16:51:09,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:51:09,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:09,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:09,847 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:09,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 16:51:09,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:51:09,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:09,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-21 16:51:09,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:09,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:51:10,074 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 [2022-07-21 16:51:10,109 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 [2022-07-21 16:51:10,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:51:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:10,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:10,236 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_622 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_622) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 16:51:10,243 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:10,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-21 16:51:10,247 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:10,247 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 [2022-07-21 16:51:10,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:51:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:10,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174656795] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:10,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:10,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 31 [2022-07-21 16:51:10,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75810609] [2022-07-21 16:51:10,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:10,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 16:51:10,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:10,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 16:51:10,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=782, Unknown=1, NotChecked=56, Total=930 [2022-07-21 16:51:10,410 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 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) [2022-07-21 16:51:10,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:10,942 INFO L93 Difference]: Finished difference Result 491 states and 536 transitions. [2022-07-21 16:51:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 16:51:10,943 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-21 16:51:10,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:10,944 INFO L225 Difference]: With dead ends: 491 [2022-07-21 16:51:10,944 INFO L226 Difference]: Without dead ends: 457 [2022-07-21 16:51:10,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=1590, Unknown=1, NotChecked=82, Total=1892 [2022-07-21 16:51:10,945 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 304 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:10,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1138 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 828 Invalid, 0 Unknown, 243 Unchecked, 0.3s Time] [2022-07-21 16:51:10,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-07-21 16:51:10,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 277. [2022-07-21 16:51:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 273 states have (on average 1.1428571428571428) internal successors, (312), 276 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 312 transitions. [2022-07-21 16:51:10,949 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 312 transitions. Word has length 41 [2022-07-21 16:51:10,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:10,949 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 312 transitions. [2022-07-21 16:51:10,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 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) [2022-07-21 16:51:10,949 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 312 transitions. [2022-07-21 16:51:10,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 16:51:10,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:10,950 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-07-21 16:51:10,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:11,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-21 16:51:11,167 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:11,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:11,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2099498562, now seen corresponding path program 2 times [2022-07-21 16:51:11,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:11,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048361876] [2022-07-21 16:51:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:11,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 16:51:11,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:11,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048361876] [2022-07-21 16:51:11,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048361876] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:11,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706288653] [2022-07-21 16:51:11,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:51:11,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:11,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:11,398 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:11,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 16:51:11,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:51:11,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:11,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 16:51:11,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:11,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:51:11,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:51:11,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-21 16:51:11,720 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 16:51:11,720 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 18 treesize of output 10 [2022-07-21 16:51:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 16:51:11,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:11,755 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_665) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|))) is different from false [2022-07-21 16:51:11,760 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_665) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2022-07-21 16:51:11,769 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_665) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0)) is different from false [2022-07-21 16:51:11,773 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:11,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:51:11,777 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:11,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:51:11,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:51:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 4 not checked. [2022-07-21 16:51:11,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706288653] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:11,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:11,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2022-07-21 16:51:11,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52711212] [2022-07-21 16:51:11,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:11,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 16:51:11,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:11,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 16:51:11,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=708, Unknown=3, NotChecked=168, Total=992 [2022-07-21 16:51:11,875 INFO L87 Difference]: Start difference. First operand 277 states and 312 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:12,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:12,163 INFO L93 Difference]: Finished difference Result 474 states and 521 transitions. [2022-07-21 16:51:12,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 16:51:12,164 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-21 16:51:12,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:12,164 INFO L225 Difference]: With dead ends: 474 [2022-07-21 16:51:12,164 INFO L226 Difference]: Without dead ends: 367 [2022-07-21 16:51:12,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 2 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=1212, Unknown=3, NotChecked=222, Total=1640 [2022-07-21 16:51:12,165 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:12,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 357 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 288 Invalid, 0 Unknown, 214 Unchecked, 0.1s Time] [2022-07-21 16:51:12,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-07-21 16:51:12,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 319. [2022-07-21 16:51:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 315 states have (on average 1.1365079365079365) internal successors, (358), 318 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 358 transitions. [2022-07-21 16:51:12,169 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 358 transitions. Word has length 43 [2022-07-21 16:51:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:12,169 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 358 transitions. [2022-07-21 16:51:12,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 358 transitions. [2022-07-21 16:51:12,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 16:51:12,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:12,170 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:12,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:12,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-21 16:51:12,383 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:12,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:12,384 INFO L85 PathProgramCache]: Analyzing trace with hash 315939143, now seen corresponding path program 9 times [2022-07-21 16:51:12,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:12,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711946291] [2022-07-21 16:51:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:12,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:12,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:12,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711946291] [2022-07-21 16:51:12,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711946291] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:12,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620922425] [2022-07-21 16:51:12,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:51:12,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:12,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:12,530 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:12,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 16:51:12,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-21 16:51:12,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:12,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 16:51:12,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:12,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:12,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:51:12,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:51:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:12,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:13,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:13,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620922425] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:13,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:13,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2022-07-21 16:51:13,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604811909] [2022-07-21 16:51:13,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:13,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 16:51:13,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:13,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 16:51:13,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1630, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 16:51:13,372 INFO L87 Difference]: Start difference. First operand 319 states and 358 transitions. Second operand has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:14,319 INFO L93 Difference]: Finished difference Result 571 states and 623 transitions. [2022-07-21 16:51:14,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 16:51:14,320 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-21 16:51:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:14,321 INFO L225 Difference]: With dead ends: 571 [2022-07-21 16:51:14,321 INFO L226 Difference]: Without dead ends: 551 [2022-07-21 16:51:14,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=773, Invalid=3133, Unknown=0, NotChecked=0, Total=3906 [2022-07-21 16:51:14,322 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 685 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:14,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 850 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 16:51:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-07-21 16:51:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 348. [2022-07-21 16:51:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 344 states have (on average 1.130813953488372) internal successors, (389), 347 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 389 transitions. [2022-07-21 16:51:14,327 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 389 transitions. Word has length 45 [2022-07-21 16:51:14,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:14,327 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 389 transitions. [2022-07-21 16:51:14,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 44 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 389 transitions. [2022-07-21 16:51:14,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 16:51:14,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:14,328 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:14,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:14,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-21 16:51:14,545 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:14,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:14,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1325160992, now seen corresponding path program 10 times [2022-07-21 16:51:14,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:14,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013975781] [2022-07-21 16:51:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:14,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 18 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:14,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:14,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013975781] [2022-07-21 16:51:14,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013975781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:14,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891880148] [2022-07-21 16:51:14,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:51:14,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:14,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:14,751 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:14,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 16:51:14,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:51:14,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:14,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-21 16:51:14,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:14,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:51:14,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:51:15,134 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 [2022-07-21 16:51:15,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-21 16:51:29,478 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:29,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-21 16:51:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 27 proven. 56 refuted. 11 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:29,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:29,948 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:29,949 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 [2022-07-21 16:51:29,954 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:29,954 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 [2022-07-21 16:51:29,958 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 9 treesize of output 7 [2022-07-21 16:51:30,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 39 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:30,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891880148] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:30,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:30,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 53 [2022-07-21 16:51:30,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2767257] [2022-07-21 16:51:30,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:30,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-21 16:51:30,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:30,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-21 16:51:30,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2505, Unknown=7, NotChecked=0, Total=2756 [2022-07-21 16:51:30,594 INFO L87 Difference]: Start difference. First operand 348 states and 389 transitions. Second operand has 53 states, 53 states have (on average 2.4150943396226414) internal successors, (128), 53 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) [2022-07-21 16:51:39,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:39,522 INFO L93 Difference]: Finished difference Result 726 states and 787 transitions. [2022-07-21 16:51:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-21 16:51:39,522 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.4150943396226414) internal successors, (128), 53 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 47 [2022-07-21 16:51:39,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:39,524 INFO L225 Difference]: With dead ends: 726 [2022-07-21 16:51:39,524 INFO L226 Difference]: Without dead ends: 656 [2022-07-21 16:51:39,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=542, Invalid=5771, Unknown=7, NotChecked=0, Total=6320 [2022-07-21 16:51:39,525 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 263 mSDsluCounter, 2105 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 2205 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:39,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 2205 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1418 Invalid, 0 Unknown, 412 Unchecked, 0.5s Time] [2022-07-21 16:51:39,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-07-21 16:51:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 377. [2022-07-21 16:51:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 373 states have (on average 1.1313672922252012) internal successors, (422), 376 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 422 transitions. [2022-07-21 16:51:39,530 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 422 transitions. Word has length 47 [2022-07-21 16:51:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:39,530 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 422 transitions. [2022-07-21 16:51:39,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.4150943396226414) internal successors, (128), 53 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) [2022-07-21 16:51:39,531 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 422 transitions. [2022-07-21 16:51:39,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 16:51:39,531 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:39,531 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:39,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:39,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:39,748 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:39,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:39,749 INFO L85 PathProgramCache]: Analyzing trace with hash 599820123, now seen corresponding path program 3 times [2022-07-21 16:51:39,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:39,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355936633] [2022-07-21 16:51:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:39,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 16:51:39,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:39,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355936633] [2022-07-21 16:51:39,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355936633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:39,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587233653] [2022-07-21 16:51:39,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:51:39,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:39,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:39,880 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:39,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 16:51:39,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 16:51:39,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:39,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 16:51:39,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 16:51:40,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:40,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-21 16:51:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 16:51:40,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587233653] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:40,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:40,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-07-21 16:51:40,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263107407] [2022-07-21 16:51:40,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:40,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 16:51:40,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:40,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 16:51:40,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-07-21 16:51:40,279 INFO L87 Difference]: Start difference. First operand 377 states and 422 transitions. Second operand has 26 states, 25 states have (on average 3.96) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:40,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:40,700 INFO L93 Difference]: Finished difference Result 501 states and 544 transitions. [2022-07-21 16:51:40,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 16:51:40,700 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.96) internal successors, (99), 26 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 47 [2022-07-21 16:51:40,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:40,708 INFO L225 Difference]: With dead ends: 501 [2022-07-21 16:51:40,708 INFO L226 Difference]: Without dead ends: 501 [2022-07-21 16:51:40,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 16:51:40,709 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 421 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:40,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 315 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:51:40,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-07-21 16:51:40,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 393. [2022-07-21 16:51:40,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 389 states have (on average 1.1233933161953729) internal successors, (437), 392 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:40,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 437 transitions. [2022-07-21 16:51:40,713 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 437 transitions. Word has length 47 [2022-07-21 16:51:40,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:40,713 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 437 transitions. [2022-07-21 16:51:40,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.96) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:40,713 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 437 transitions. [2022-07-21 16:51:40,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 16:51:40,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:40,714 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:40,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:40,931 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,SelfDestructingSolverStorable39 [2022-07-21 16:51:40,932 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:40,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:40,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1568194937, now seen corresponding path program 1 times [2022-07-21 16:51:40,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:40,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447381010] [2022-07-21 16:51:40,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:40,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:51:41,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:41,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447381010] [2022-07-21 16:51:41,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447381010] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:41,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546052594] [2022-07-21 16:51:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:41,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:41,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:41,049 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:41,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 16:51:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:41,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 16:51:41,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:41,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:41,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:51:41,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:51:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:51:41,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:41,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:51:41,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546052594] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:41,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:41,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 34 [2022-07-21 16:51:41,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739722575] [2022-07-21 16:51:41,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:41,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 16:51:41,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:41,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 16:51:41,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 16:51:41,886 INFO L87 Difference]: Start difference. First operand 393 states and 437 transitions. Second operand has 35 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 35 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) [2022-07-21 16:51:43,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:43,520 INFO L93 Difference]: Finished difference Result 626 states and 683 transitions. [2022-07-21 16:51:43,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 16:51:43,520 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 35 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 [2022-07-21 16:51:43,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:43,521 INFO L225 Difference]: With dead ends: 626 [2022-07-21 16:51:43,521 INFO L226 Difference]: Without dead ends: 620 [2022-07-21 16:51:43,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=882, Invalid=3810, Unknown=0, NotChecked=0, Total=4692 [2022-07-21 16:51:43,522 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 425 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:43,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 456 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 16:51:43,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-07-21 16:51:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 454. [2022-07-21 16:51:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 450 states have (on average 1.1311111111111112) internal successors, (509), 453 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:43,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 509 transitions. [2022-07-21 16:51:43,527 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 509 transitions. Word has length 50 [2022-07-21 16:51:43,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:43,527 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 509 transitions. [2022-07-21 16:51:43,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 35 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) [2022-07-21 16:51:43,527 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 509 transitions. [2022-07-21 16:51:43,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 16:51:43,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:43,528 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:43,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:43,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:43,743 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:43,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1171395, now seen corresponding path program 11 times [2022-07-21 16:51:43,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:43,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506865668] [2022-07-21 16:51:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:43,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:43,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:43,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506865668] [2022-07-21 16:51:43,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506865668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:43,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792747212] [2022-07-21 16:51:43,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:51:43,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:43,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:43,947 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:43,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 16:51:44,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-21 16:51:44,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:44,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-21 16:51:44,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:44,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:44,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:51:44,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:51:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:44,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:44,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 66 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:44,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792747212] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:44,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:44,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-07-21 16:51:44,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120081468] [2022-07-21 16:51:44,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:44,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 16:51:44,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:44,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 16:51:44,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 16:51:44,931 INFO L87 Difference]: Start difference. First operand 454 states and 509 transitions. Second operand has 46 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 46 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) [2022-07-21 16:51:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:46,062 INFO L93 Difference]: Finished difference Result 904 states and 985 transitions. [2022-07-21 16:51:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 16:51:46,062 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 46 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 51 [2022-07-21 16:51:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:46,064 INFO L225 Difference]: With dead ends: 904 [2022-07-21 16:51:46,064 INFO L226 Difference]: Without dead ends: 884 [2022-07-21 16:51:46,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2022-07-21 16:51:46,065 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 558 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:46,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1560 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2008 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 16:51:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-07-21 16:51:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 504. [2022-07-21 16:51:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.124) internal successors, (562), 503 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 562 transitions. [2022-07-21 16:51:46,071 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 562 transitions. Word has length 51 [2022-07-21 16:51:46,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:46,071 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 562 transitions. [2022-07-21 16:51:46,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 46 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) [2022-07-21 16:51:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 562 transitions. [2022-07-21 16:51:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 16:51:46,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:46,072 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:46,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:46,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:46,280 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:46,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:46,281 INFO L85 PathProgramCache]: Analyzing trace with hash 620577460, now seen corresponding path program 3 times [2022-07-21 16:51:46,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:46,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682182656] [2022-07-21 16:51:46,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:46,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:46,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:46,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682182656] [2022-07-21 16:51:46,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682182656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:46,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255922743] [2022-07-21 16:51:46,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:51:46,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:46,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:46,755 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:46,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 16:51:46,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 16:51:46,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:46,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-21 16:51:46,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:47,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:51:47,356 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-07-21 16:51:47,357 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 [2022-07-21 16:51:47,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-21 16:51:47,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:47,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:47,380 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 [2022-07-21 16:51:47,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-21 16:51:47,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:47,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:47,808 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:47,808 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 [2022-07-21 16:51:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:47,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:47,824 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2022-07-21 16:51:47,829 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2022-07-21 16:51:47,866 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) (= |c_ULTIMATE.start_cstrncat_#t~mem5#1| 0)) is different from false [2022-07-21 16:51:47,873 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_#t~post4#1.base|) |c_ULTIMATE.start_cstrncat_#t~post4#1.offset|) 0)) is different from false [2022-07-21 16:51:47,883 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_933 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~s2#1.offset|)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2022-07-21 16:51:48,024 INFO L356 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2022-07-21 16:51:48,024 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 [2022-07-21 16:51:48,037 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:48,038 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 [2022-07-21 16:51:48,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:51:48,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:48,072 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 [2022-07-21 16:51:48,096 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:48,096 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 [2022-07-21 16:51:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 14 not checked. [2022-07-21 16:51:48,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255922743] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:48,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:48,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 22] total 57 [2022-07-21 16:51:48,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21968736] [2022-07-21 16:51:48,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:48,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-21 16:51:48,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:48,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-21 16:51:48,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2412, Unknown=6, NotChecked=520, Total=3192 [2022-07-21 16:51:48,530 INFO L87 Difference]: Start difference. First operand 504 states and 562 transitions. Second operand has 57 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:49,383 INFO L93 Difference]: Finished difference Result 522 states and 579 transitions. [2022-07-21 16:51:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 16:51:49,383 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-21 16:51:49,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:49,384 INFO L225 Difference]: With dead ends: 522 [2022-07-21 16:51:49,384 INFO L226 Difference]: Without dead ends: 504 [2022-07-21 16:51:49,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=435, Invalid=4001, Unknown=6, NotChecked=670, Total=5112 [2022-07-21 16:51:49,385 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 108 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:49,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 469 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 356 Invalid, 0 Unknown, 575 Unchecked, 0.2s Time] [2022-07-21 16:51:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-07-21 16:51:49,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2022-07-21 16:51:49,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.122) internal successors, (561), 503 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 561 transitions. [2022-07-21 16:51:49,390 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 561 transitions. Word has length 51 [2022-07-21 16:51:49,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:49,390 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 561 transitions. [2022-07-21 16:51:49,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:49,390 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 561 transitions. [2022-07-21 16:51:49,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 16:51:49,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:49,391 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:49,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:49,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:49,608 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:49,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:49,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1125709994, now seen corresponding path program 12 times [2022-07-21 16:51:49,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:49,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033225368] [2022-07-21 16:51:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:49,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:49,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:49,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033225368] [2022-07-21 16:51:49,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033225368] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:49,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887199089] [2022-07-21 16:51:49,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:51:49,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:49,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:49,884 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:49,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 16:51:49,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-21 16:51:49,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:49,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-21 16:51:49,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:50,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:51:50,223 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 [2022-07-21 16:51:50,259 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 [2022-07-21 16:51:50,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:51:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:50,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:50,432 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_980 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_980) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 16:51:50,436 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:50,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-21 16:51:50,441 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:50,441 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 [2022-07-21 16:51:50,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:51:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:50,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887199089] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:50,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:50,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 37 [2022-07-21 16:51:50,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251640815] [2022-07-21 16:51:50,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:50,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 16:51:50,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:50,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 16:51:50,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1158, Unknown=1, NotChecked=68, Total=1332 [2022-07-21 16:51:50,655 INFO L87 Difference]: Start difference. First operand 504 states and 561 transitions. Second operand has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:51,517 INFO L93 Difference]: Finished difference Result 1062 states and 1151 transitions. [2022-07-21 16:51:51,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 16:51:51,518 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 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 [2022-07-21 16:51:51,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:51,521 INFO L225 Difference]: With dead ends: 1062 [2022-07-21 16:51:51,521 INFO L226 Difference]: Without dead ends: 1003 [2022-07-21 16:51:51,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=1899, Unknown=1, NotChecked=88, Total=2162 [2022-07-21 16:51:51,521 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 230 mSDsluCounter, 2380 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 2503 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:51,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 2503 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1787 Invalid, 0 Unknown, 323 Unchecked, 0.6s Time] [2022-07-21 16:51:51,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-07-21 16:51:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 537. [2022-07-21 16:51:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 533 states have (on average 1.125703564727955) internal successors, (600), 536 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 600 transitions. [2022-07-21 16:51:51,527 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 600 transitions. Word has length 53 [2022-07-21 16:51:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:51,528 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 600 transitions. [2022-07-21 16:51:51,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 600 transitions. [2022-07-21 16:51:51,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 16:51:51,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:51,529 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2022-07-21 16:51:51,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:51,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:51,743 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:51,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:51,744 INFO L85 PathProgramCache]: Analyzing trace with hash -986319027, now seen corresponding path program 4 times [2022-07-21 16:51:51,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:51,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165496827] [2022-07-21 16:51:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:51,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:51:52,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:52,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165496827] [2022-07-21 16:51:52,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165496827] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:52,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818520105] [2022-07-21 16:51:52,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:51:52,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:52,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:52,244 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:52,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 16:51:52,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:51:52,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:52,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-21 16:51:52,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:52,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:51:52,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:51:52,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 16:51:52,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:51:52,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:51:52,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:52,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-21 16:51:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 16:51:52,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:53,261 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:53,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-21 16:51:53,266 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:53,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-21 16:51:53,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 16:51:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 16:51:53,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818520105] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:53,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:53,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 43 [2022-07-21 16:51:53,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157471073] [2022-07-21 16:51:53,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:53,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 16:51:53,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:53,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 16:51:53,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1636, Unknown=33, NotChecked=0, Total=1806 [2022-07-21 16:51:53,645 INFO L87 Difference]: Start difference. First operand 537 states and 600 transitions. Second operand has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 43 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:54,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:54,518 INFO L93 Difference]: Finished difference Result 555 states and 617 transitions. [2022-07-21 16:51:54,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 16:51:54,519 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 43 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-21 16:51:54,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:54,520 INFO L225 Difference]: With dead ends: 555 [2022-07-21 16:51:54,520 INFO L226 Difference]: Without dead ends: 518 [2022-07-21 16:51:54,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=340, Invalid=3165, Unknown=35, NotChecked=0, Total=3540 [2022-07-21 16:51:54,521 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 100 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:54,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 521 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 420 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2022-07-21 16:51:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-07-21 16:51:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2022-07-21 16:51:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 514 states have (on average 1.1245136186770428) internal successors, (578), 517 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 578 transitions. [2022-07-21 16:51:54,525 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 578 transitions. Word has length 53 [2022-07-21 16:51:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:54,525 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 578 transitions. [2022-07-21 16:51:54,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 43 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 578 transitions. [2022-07-21 16:51:54,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 16:51:54,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:54,526 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:54,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:54,739 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,SelfDestructingSolverStorable44 [2022-07-21 16:51:54,739 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:54,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:54,740 INFO L85 PathProgramCache]: Analyzing trace with hash 796337809, now seen corresponding path program 4 times [2022-07-21 16:51:54,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:54,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516408349] [2022-07-21 16:51:54,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:54,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:55,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:55,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516408349] [2022-07-21 16:51:55,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516408349] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:55,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958411536] [2022-07-21 16:51:55,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:51:55,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:55,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:55,101 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:55,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 16:51:55,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:51:55,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:55,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-21 16:51:55,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:55,208 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:51:55,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:51:55,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:51:55,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 16:51:55,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:51:55,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:51:55,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:55,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-21 16:51:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:51:55,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:56,070 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:56,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-21 16:51:56,076 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:56,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-21 16:51:56,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 16:51:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:51:56,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958411536] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:56,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:56,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 45 [2022-07-21 16:51:56,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041386929] [2022-07-21 16:51:56,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:56,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 16:51:56,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:56,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 16:51:56,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1782, Unknown=39, NotChecked=0, Total=1980 [2022-07-21 16:51:56,538 INFO L87 Difference]: Start difference. First operand 518 states and 578 transitions. Second operand has 45 states, 45 states have (on average 2.8222222222222224) internal successors, (127), 45 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:57,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:57,474 INFO L93 Difference]: Finished difference Result 671 states and 739 transitions. [2022-07-21 16:51:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 16:51:57,475 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8222222222222224) internal successors, (127), 45 states have internal predecessors, (127), 0 states have call successors, (0), 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 55 [2022-07-21 16:51:57,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:57,476 INFO L225 Difference]: With dead ends: 671 [2022-07-21 16:51:57,476 INFO L226 Difference]: Without dead ends: 599 [2022-07-21 16:51:57,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=484, Invalid=4305, Unknown=41, NotChecked=0, Total=4830 [2022-07-21 16:51:57,477 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 134 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:57,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 475 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 476 Invalid, 0 Unknown, 171 Unchecked, 0.2s Time] [2022-07-21 16:51:57,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-07-21 16:51:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 563. [2022-07-21 16:51:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 559 states have (on average 1.1234347048300537) internal successors, (628), 562 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 628 transitions. [2022-07-21 16:51:57,482 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 628 transitions. Word has length 55 [2022-07-21 16:51:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:57,482 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 628 transitions. [2022-07-21 16:51:57,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8222222222222224) internal successors, (127), 45 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 628 transitions. [2022-07-21 16:51:57,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 16:51:57,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:57,483 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2022-07-21 16:51:57,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:57,700 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,SelfDestructingSolverStorable45 [2022-07-21 16:51:57,700 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:57,701 INFO L85 PathProgramCache]: Analyzing trace with hash 37563779, now seen corresponding path program 2 times [2022-07-21 16:51:57,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:57,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299694156] [2022-07-21 16:51:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:57,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:51:57,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:57,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299694156] [2022-07-21 16:51:57,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299694156] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:57,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944176971] [2022-07-21 16:51:57,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:51:57,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:57,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:57,885 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:51:57,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 16:51:57,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:51:57,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:57,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 16:51:57,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:58,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:58,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:51:58,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:51:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:51:58,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:58,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:51:58,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944176971] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:58,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:58,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 40 [2022-07-21 16:51:58,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692242931] [2022-07-21 16:51:58,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:58,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 16:51:58,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:58,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 16:51:58,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 16:51:58,935 INFO L87 Difference]: Start difference. First operand 563 states and 628 transitions. Second operand has 41 states, 40 states have (on average 3.675) internal successors, (147), 41 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:00,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:52:00,662 INFO L93 Difference]: Finished difference Result 818 states and 891 transitions. [2022-07-21 16:52:00,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 16:52:00,663 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.675) internal successors, (147), 41 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-21 16:52:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:52:00,664 INFO L225 Difference]: With dead ends: 818 [2022-07-21 16:52:00,664 INFO L226 Difference]: Without dead ends: 814 [2022-07-21 16:52:00,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=938, Invalid=4318, Unknown=0, NotChecked=0, Total=5256 [2022-07-21 16:52:00,665 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 719 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:52:00,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 641 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 16:52:00,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-07-21 16:52:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 548. [2022-07-21 16:52:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 544 states have (on average 1.1286764705882353) internal successors, (614), 547 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:00,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 614 transitions. [2022-07-21 16:52:00,671 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 614 transitions. Word has length 56 [2022-07-21 16:52:00,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:52:00,671 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 614 transitions. [2022-07-21 16:52:00,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.675) internal successors, (147), 41 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 614 transitions. [2022-07-21 16:52:00,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 16:52:00,672 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:52:00,672 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:52:00,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 16:52:00,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-21 16:52:00,882 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:52:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:52:00,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1540257805, now seen corresponding path program 13 times [2022-07-21 16:52:00,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:52:00,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047716791] [2022-07-21 16:52:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:52:00,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:52:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:01,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:52:01,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047716791] [2022-07-21 16:52:01,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047716791] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:52:01,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767755740] [2022-07-21 16:52:01,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:52:01,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:01,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:52:01,154 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:52:01,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 16:52:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:01,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-21 16:52:01,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:52:01,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:52:01,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:52:01,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:52:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 66 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:01,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:52:02,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:52:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:02,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767755740] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:52:02,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:52:02,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 55 [2022-07-21 16:52:02,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551152971] [2022-07-21 16:52:02,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:52:02,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-21 16:52:02,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:52:02,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-21 16:52:02,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=2722, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 16:52:02,390 INFO L87 Difference]: Start difference. First operand 548 states and 614 transitions. Second operand has 56 states, 55 states have (on average 2.9272727272727272) internal successors, (161), 56 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:52:03,960 INFO L93 Difference]: Finished difference Result 1083 states and 1178 transitions. [2022-07-21 16:52:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 16:52:03,961 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.9272727272727272) internal successors, (161), 56 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-21 16:52:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:52:03,963 INFO L225 Difference]: With dead ends: 1083 [2022-07-21 16:52:03,963 INFO L226 Difference]: Without dead ends: 1063 [2022-07-21 16:52:03,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1178, Invalid=5142, Unknown=0, NotChecked=0, Total=6320 [2022-07-21 16:52:03,963 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 767 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 2256 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1734 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 16:52:03,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 1734 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2256 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 16:52:03,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2022-07-21 16:52:03,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 598. [2022-07-21 16:52:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 594 states have (on average 1.1228956228956228) internal successors, (667), 597 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 667 transitions. [2022-07-21 16:52:03,970 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 667 transitions. Word has length 57 [2022-07-21 16:52:03,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:52:03,970 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 667 transitions. [2022-07-21 16:52:03,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.9272727272727272) internal successors, (161), 56 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:03,970 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 667 transitions. [2022-07-21 16:52:03,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 16:52:03,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:52:03,971 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2022-07-21 16:52:03,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-21 16:52:04,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:04,184 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:52:04,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:52:04,184 INFO L85 PathProgramCache]: Analyzing trace with hash 415651818, now seen corresponding path program 5 times [2022-07-21 16:52:04,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:52:04,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655406322] [2022-07-21 16:52:04,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:52:04,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:52:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:52:04,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:52:04,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655406322] [2022-07-21 16:52:04,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655406322] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:52:04,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745774270] [2022-07-21 16:52:04,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:52:04,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:04,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:52:04,514 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:52:04,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-21 16:52:04,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 16:52:04,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:52:04,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-21 16:52:04,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:52:04,666 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:52:04,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:52:04,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:52:05,033 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:52:05,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-21 16:52:05,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-21 16:52:05,223 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:52:05,223 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 [2022-07-21 16:52:05,414 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:05,414 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 23 treesize of output 23 [2022-07-21 16:52:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:52:05,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:52:06,452 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:06,452 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:52:06,459 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:06,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:52:06,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:52:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:52:07,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745774270] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:52:07,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:52:07,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 60 [2022-07-21 16:52:07,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348277009] [2022-07-21 16:52:07,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:52:07,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-21 16:52:07,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:52:07,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-21 16:52:07,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=3258, Unknown=3, NotChecked=0, Total=3540 [2022-07-21 16:52:07,132 INFO L87 Difference]: Start difference. First operand 598 states and 667 transitions. Second operand has 60 states, 60 states have (on average 2.466666666666667) internal successors, (148), 60 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:52:09,423 INFO L93 Difference]: Finished difference Result 1183 states and 1263 transitions. [2022-07-21 16:52:09,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-21 16:52:09,423 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.466666666666667) internal successors, (148), 60 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-21 16:52:09,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:52:09,425 INFO L225 Difference]: With dead ends: 1183 [2022-07-21 16:52:09,425 INFO L226 Difference]: Without dead ends: 938 [2022-07-21 16:52:09,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2654 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=971, Invalid=10778, Unknown=23, NotChecked=0, Total=11772 [2022-07-21 16:52:09,426 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 247 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 606 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:52:09,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 1057 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 951 Invalid, 0 Unknown, 606 Unchecked, 0.4s Time] [2022-07-21 16:52:09,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-07-21 16:52:09,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 698. [2022-07-21 16:52:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 694 states have (on average 1.1123919308357348) internal successors, (772), 697 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 772 transitions. [2022-07-21 16:52:09,431 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 772 transitions. Word has length 57 [2022-07-21 16:52:09,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:52:09,431 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 772 transitions. [2022-07-21 16:52:09,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.466666666666667) internal successors, (148), 60 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:09,432 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 772 transitions. [2022-07-21 16:52:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 16:52:09,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:52:09,432 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:52:09,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-21 16:52:09,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-21 16:52:09,640 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:52:09,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:52:09,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1575967116, now seen corresponding path program 14 times [2022-07-21 16:52:09,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:52:09,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932453704] [2022-07-21 16:52:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:52:09,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:52:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:52:09,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:52:09,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932453704] [2022-07-21 16:52:09,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932453704] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:52:09,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416419354] [2022-07-21 16:52:09,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:52:09,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:09,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:52:09,957 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:52:09,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-21 16:52:10,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:52:10,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:52:10,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-21 16:52:10,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:52:10,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:52:10,342 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 [2022-07-21 16:52:10,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-21 16:52:10,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:52:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:52:10,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:52:10,594 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1295) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 16:52:10,598 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:10,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-21 16:52:10,602 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:10,602 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 [2022-07-21 16:52:10,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:52:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:52:10,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416419354] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:52:10,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:52:10,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 40 [2022-07-21 16:52:10,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126110356] [2022-07-21 16:52:10,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:52:10,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 16:52:10,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:52:10,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 16:52:10,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1373, Unknown=1, NotChecked=74, Total=1560 [2022-07-21 16:52:10,805 INFO L87 Difference]: Start difference. First operand 698 states and 772 transitions. Second operand has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 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) [2022-07-21 16:52:11,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:52:11,792 INFO L93 Difference]: Finished difference Result 1559 states and 1679 transitions. [2022-07-21 16:52:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 16:52:11,793 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 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 59 [2022-07-21 16:52:11,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:52:11,799 INFO L225 Difference]: With dead ends: 1559 [2022-07-21 16:52:11,799 INFO L226 Difference]: Without dead ends: 1494 [2022-07-21 16:52:11,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=186, Invalid=2267, Unknown=1, NotChecked=96, Total=2550 [2022-07-21 16:52:11,800 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 279 mSDsluCounter, 2295 mSDsCounter, 0 mSdLazyCounter, 1979 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 2424 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 16:52:11,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 2424 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1979 Invalid, 0 Unknown, 314 Unchecked, 0.7s Time] [2022-07-21 16:52:11,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-07-21 16:52:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 742. [2022-07-21 16:52:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 738 states have (on average 1.1165311653116532) internal successors, (824), 741 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 824 transitions. [2022-07-21 16:52:11,807 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 824 transitions. Word has length 59 [2022-07-21 16:52:11,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:52:11,807 INFO L495 AbstractCegarLoop]: Abstraction has 742 states and 824 transitions. [2022-07-21 16:52:11,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.65) internal successors, (106), 40 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) [2022-07-21 16:52:11,808 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 824 transitions. [2022-07-21 16:52:11,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 16:52:11,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:52:11,809 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:52:11,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-21 16:52:12,026 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,SelfDestructingSolverStorable49 [2022-07-21 16:52:12,026 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:52:12,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:52:12,027 INFO L85 PathProgramCache]: Analyzing trace with hash -105949010, now seen corresponding path program 5 times [2022-07-21 16:52:12,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:52:12,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498795225] [2022-07-21 16:52:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:52:12,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:52:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:52:12,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:52:12,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498795225] [2022-07-21 16:52:12,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498795225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:52:12,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374415308] [2022-07-21 16:52:12,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:52:12,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:12,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:52:12,149 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:52:12,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-21 16:52:12,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 16:52:12,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:52:12,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 16:52:12,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:52:12,294 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:52:12,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:52:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:52:12,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:52:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:52:12,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374415308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:52:12,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:52:12,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-07-21 16:52:12,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410102999] [2022-07-21 16:52:12,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:52:12,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 16:52:12,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:52:12,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 16:52:12,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-07-21 16:52:12,818 INFO L87 Difference]: Start difference. First operand 742 states and 824 transitions. Second operand has 30 states, 29 states have (on average 4.379310344827586) internal successors, (127), 30 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:13,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:52:13,306 INFO L93 Difference]: Finished difference Result 932 states and 1009 transitions. [2022-07-21 16:52:13,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 16:52:13,307 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.379310344827586) internal successors, (127), 30 states have internal predecessors, (127), 0 states have call successors, (0), 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 [2022-07-21 16:52:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:52:13,309 INFO L225 Difference]: With dead ends: 932 [2022-07-21 16:52:13,309 INFO L226 Difference]: Without dead ends: 932 [2022-07-21 16:52:13,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=1508, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 16:52:13,310 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 453 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:52:13,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 476 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 16:52:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-07-21 16:52:13,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 727. [2022-07-21 16:52:13,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 723 states have (on average 1.1175656984785616) internal successors, (808), 726 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:13,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 808 transitions. [2022-07-21 16:52:13,315 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 808 transitions. Word has length 59 [2022-07-21 16:52:13,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:52:13,315 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 808 transitions. [2022-07-21 16:52:13,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.379310344827586) internal successors, (127), 30 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 808 transitions. [2022-07-21 16:52:13,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 16:52:13,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:52:13,316 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2022-07-21 16:52:13,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-21 16:52:13,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:13,517 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:52:13,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:52:13,517 INFO L85 PathProgramCache]: Analyzing trace with hash -2039963443, now seen corresponding path program 3 times [2022-07-21 16:52:13,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:52:13,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924808846] [2022-07-21 16:52:13,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:52:13,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:52:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:52:13,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:52:13,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924808846] [2022-07-21 16:52:13,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924808846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:52:13,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569562998] [2022-07-21 16:52:13,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:52:13,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:13,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:52:13,728 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:52:13,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-21 16:52:13,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 16:52:13,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:52:13,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-21 16:52:13,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:52:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:52:13,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:52:13,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:52:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:52:14,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:52:14,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:52:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:52:14,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569562998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:52:14,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:52:14,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 47 [2022-07-21 16:52:14,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239688240] [2022-07-21 16:52:14,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:52:14,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-21 16:52:14,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:52:14,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-21 16:52:14,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 16:52:14,997 INFO L87 Difference]: Start difference. First operand 727 states and 808 transitions. Second operand has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:52:18,093 INFO L93 Difference]: Finished difference Result 1232 states and 1324 transitions. [2022-07-21 16:52:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-21 16:52:18,093 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 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 [2022-07-21 16:52:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:52:18,095 INFO L225 Difference]: With dead ends: 1232 [2022-07-21 16:52:18,095 INFO L226 Difference]: Without dead ends: 1199 [2022-07-21 16:52:18,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1882, Invalid=8018, Unknown=0, NotChecked=0, Total=9900 [2022-07-21 16:52:18,096 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 929 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 16:52:18,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 994 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 2300 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 16:52:18,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-07-21 16:52:18,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 695. [2022-07-21 16:52:18,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 691 states have (on average 1.1186685962373373) internal successors, (773), 694 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:18,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 773 transitions. [2022-07-21 16:52:18,103 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 773 transitions. Word has length 62 [2022-07-21 16:52:18,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:52:18,103 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 773 transitions. [2022-07-21 16:52:18,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:18,103 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 773 transitions. [2022-07-21 16:52:18,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 16:52:18,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:52:18,104 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:52:18,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-21 16:52:18,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:18,318 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:52:18,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:52:18,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1265880983, now seen corresponding path program 15 times [2022-07-21 16:52:18,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:52:18,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770041455] [2022-07-21 16:52:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:52:18,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:52:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 66 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:18,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:52:18,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770041455] [2022-07-21 16:52:18,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770041455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:52:18,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63367560] [2022-07-21 16:52:18,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:52:18,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:18,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:52:18,729 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:52:18,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-21 16:52:18,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-21 16:52:18,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:52:18,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-21 16:52:18,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:52:18,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:52:18,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:52:18,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:52:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 91 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:19,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:52:20,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:52:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 120 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:20,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63367560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:52:20,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:52:20,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 64 [2022-07-21 16:52:20,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185381371] [2022-07-21 16:52:20,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:52:20,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-21 16:52:20,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:52:20,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-21 16:52:20,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=3686, Unknown=0, NotChecked=0, Total=4160 [2022-07-21 16:52:20,369 INFO L87 Difference]: Start difference. First operand 695 states and 773 transitions. Second operand has 65 states, 64 states have (on average 2.828125) internal successors, (181), 65 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:52:23,916 INFO L93 Difference]: Finished difference Result 1624 states and 1747 transitions. [2022-07-21 16:52:23,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-21 16:52:23,916 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 2.828125) internal successors, (181), 65 states have internal predecessors, (181), 0 states have call successors, (0), 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 63 [2022-07-21 16:52:23,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:52:23,920 INFO L225 Difference]: With dead ends: 1624 [2022-07-21 16:52:23,920 INFO L226 Difference]: Without dead ends: 1598 [2022-07-21 16:52:23,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2644, Invalid=10238, Unknown=0, NotChecked=0, Total=12882 [2022-07-21 16:52:23,921 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 1114 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 16:52:23,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 1306 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 16:52:23,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2022-07-21 16:52:23,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 759. [2022-07-21 16:52:23,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 755 states have (on average 1.1125827814569536) internal successors, (840), 758 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 840 transitions. [2022-07-21 16:52:23,928 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 840 transitions. Word has length 63 [2022-07-21 16:52:23,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:52:23,929 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 840 transitions. [2022-07-21 16:52:23,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 2.828125) internal successors, (181), 65 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 840 transitions. [2022-07-21 16:52:23,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 16:52:23,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:52:23,930 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:52:23,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-21 16:52:24,143 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,SelfDestructingSolverStorable52 [2022-07-21 16:52:24,143 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:52:24,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:52:24,144 INFO L85 PathProgramCache]: Analyzing trace with hash -749215359, now seen corresponding path program 1 times [2022-07-21 16:52:24,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:52:24,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835907393] [2022-07-21 16:52:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:52:24,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:52:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:52:24,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:52:24,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835907393] [2022-07-21 16:52:24,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835907393] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:52:24,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885462927] [2022-07-21 16:52:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:52:24,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:24,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:52:24,333 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:52:24,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-21 16:52:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:24,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-21 16:52:24,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:52:24,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:52:24,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:52:24,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:52:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:52:25,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:52:25,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:52:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:52:25,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885462927] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:52:25,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:52:25,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 48 [2022-07-21 16:52:25,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415389208] [2022-07-21 16:52:25,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:52:25,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 16:52:25,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:52:25,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 16:52:25,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1984, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 16:52:25,773 INFO L87 Difference]: Start difference. First operand 759 states and 840 transitions. Second operand has 49 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:27,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:52:27,696 INFO L93 Difference]: Finished difference Result 1201 states and 1293 transitions. [2022-07-21 16:52:27,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-21 16:52:27,696 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-21 16:52:27,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:52:27,698 INFO L225 Difference]: With dead ends: 1201 [2022-07-21 16:52:27,698 INFO L226 Difference]: Without dead ends: 1201 [2022-07-21 16:52:27,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1901, Invalid=6471, Unknown=0, NotChecked=0, Total=8372 [2022-07-21 16:52:27,699 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 657 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:52:27,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 425 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 16:52:27,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-07-21 16:52:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 771. [2022-07-21 16:52:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 767 states have (on average 1.1160365058670143) internal successors, (856), 770 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 856 transitions. [2022-07-21 16:52:27,705 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 856 transitions. Word has length 64 [2022-07-21 16:52:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:52:27,706 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 856 transitions. [2022-07-21 16:52:27,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 856 transitions. [2022-07-21 16:52:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 16:52:27,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:52:27,707 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:52:27,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-21 16:52:27,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:27,924 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:52:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:52:27,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1035879294, now seen corresponding path program 16 times [2022-07-21 16:52:27,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:52:27,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361011788] [2022-07-21 16:52:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:52:27,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:52:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 27 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:52:28,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:52:28,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361011788] [2022-07-21 16:52:28,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361011788] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:52:28,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318408381] [2022-07-21 16:52:28,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:52:28,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:28,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:52:28,273 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:52:28,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-21 16:52:28,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:52:28,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:52:28,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-21 16:52:28,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:52:28,411 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:52:28,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:52:28,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:52:28,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-21 16:52:28,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-21 16:52:29,499 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:29,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-21 16:52:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 83 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:29,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:52:30,220 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:30,220 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 [2022-07-21 16:52:30,225 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:30,226 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 [2022-07-21 16:52:30,229 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 9 treesize of output 7 [2022-07-21 16:52:31,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:52:31,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:52:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 76 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:31,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318408381] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:52:31,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:52:31,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 27] total 73 [2022-07-21 16:52:31,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802779481] [2022-07-21 16:52:31,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:52:31,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-21 16:52:31,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:52:31,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-21 16:52:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=4799, Unknown=1, NotChecked=0, Total=5256 [2022-07-21 16:52:31,278 INFO L87 Difference]: Start difference. First operand 771 states and 856 transitions. Second operand has 73 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:52:33,816 INFO L93 Difference]: Finished difference Result 1966 states and 2108 transitions. [2022-07-21 16:52:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-21 16:52:33,816 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 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 65 [2022-07-21 16:52:33,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:52:33,820 INFO L225 Difference]: With dead ends: 1966 [2022-07-21 16:52:33,820 INFO L226 Difference]: Without dead ends: 1872 [2022-07-21 16:52:33,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2640 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=933, Invalid=10838, Unknown=1, NotChecked=0, Total=11772 [2022-07-21 16:52:33,821 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 303 mSDsluCounter, 4759 mSDsCounter, 0 mSdLazyCounter, 3262 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 4908 SdHoareTripleChecker+Invalid, 4252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 938 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:52:33,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 4908 Invalid, 4252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 3262 Invalid, 0 Unknown, 938 Unchecked, 1.2s Time] [2022-07-21 16:52:33,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2022-07-21 16:52:33,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 817. [2022-07-21 16:52:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 813 states have (on average 1.120541205412054) internal successors, (911), 816 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 911 transitions. [2022-07-21 16:52:33,829 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 911 transitions. Word has length 65 [2022-07-21 16:52:33,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:52:33,829 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 911 transitions. [2022-07-21 16:52:33,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:33,829 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 911 transitions. [2022-07-21 16:52:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 16:52:33,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:52:33,830 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:52:33,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-21 16:52:34,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-21 16:52:34,030 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:52:34,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:52:34,031 INFO L85 PathProgramCache]: Analyzing trace with hash 229195360, now seen corresponding path program 6 times [2022-07-21 16:52:34,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:52:34,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3888819] [2022-07-21 16:52:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:52:34,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:52:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:34,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:52:34,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3888819] [2022-07-21 16:52:34,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3888819] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:52:34,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932813310] [2022-07-21 16:52:34,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:52:34,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:34,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:52:34,568 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:52:34,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-21 16:52:34,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 16:52:34,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:52:34,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-21 16:52:34,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:52:34,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:52:35,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 16:52:35,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 16:52:35,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 16:52:35,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 16:52:35,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:52:35,505 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:35,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2022-07-21 16:52:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:35,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:52:35,519 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1637) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2022-07-21 16:52:35,523 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1637) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2022-07-21 16:52:35,534 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1637) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~s2#1.offset|)) 0)) is different from false [2022-07-21 16:52:35,590 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1637) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ 3 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|)) 0) (not (<= |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130| |c_ULTIMATE.start_cstrncat_~s2#1.offset|)))) is different from false [2022-07-21 16:52:35,615 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130| Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1637) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 3 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|)) 0) (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|)) (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_130|))) is different from false [2022-07-21 16:52:35,620 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:35,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:52:35,626 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:35,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:52:35,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:52:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 33 not checked. [2022-07-21 16:52:36,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932813310] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:52:36,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:52:36,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 21] total 58 [2022-07-21 16:52:36,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369244835] [2022-07-21 16:52:36,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:52:36,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-21 16:52:36,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:52:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-21 16:52:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2486, Unknown=5, NotChecked=530, Total=3306 [2022-07-21 16:52:36,271 INFO L87 Difference]: Start difference. First operand 817 states and 911 transitions. Second operand has 58 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 58 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:37,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:52:37,233 INFO L93 Difference]: Finished difference Result 841 states and 934 transitions. [2022-07-21 16:52:37,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 16:52:37,234 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 58 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-21 16:52:37,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:52:37,235 INFO L225 Difference]: With dead ends: 841 [2022-07-21 16:52:37,235 INFO L226 Difference]: Without dead ends: 817 [2022-07-21 16:52:37,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 102 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=445, Invalid=3992, Unknown=5, NotChecked=670, Total=5112 [2022-07-21 16:52:37,236 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 114 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:52:37,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 662 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 931 Invalid, 0 Unknown, 352 Unchecked, 0.4s Time] [2022-07-21 16:52:37,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-07-21 16:52:37,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 817. [2022-07-21 16:52:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 813 states have (on average 1.119311193111931) internal successors, (910), 816 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 910 transitions. [2022-07-21 16:52:37,246 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 910 transitions. Word has length 65 [2022-07-21 16:52:37,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:52:37,246 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 910 transitions. [2022-07-21 16:52:37,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.8793103448275863) internal successors, (167), 58 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 910 transitions. [2022-07-21 16:52:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 16:52:37,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:52:37,247 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:52:37,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-21 16:52:37,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:37,455 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:52:37,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:52:37,456 INFO L85 PathProgramCache]: Analyzing trace with hash -85875271, now seen corresponding path program 6 times [2022-07-21 16:52:37,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:52:37,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600518825] [2022-07-21 16:52:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:52:37,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:52:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:52:37,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:52:37,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600518825] [2022-07-21 16:52:37,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600518825] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:52:37,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642572208] [2022-07-21 16:52:37,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:52:37,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:37,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:52:37,979 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:52:37,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-21 16:52:38,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 16:52:38,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:52:38,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 119 conjunts are in the unsatisfiable core [2022-07-21 16:52:38,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:52:38,158 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:52:38,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:52:38,168 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 16:52:38,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-07-21 16:52:38,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-21 16:52:39,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-07-21 16:52:39,187 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 11 treesize of output 7 [2022-07-21 16:52:39,234 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 [2022-07-21 16:52:39,316 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 [2022-07-21 16:52:39,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:52:39,436 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:39,436 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 29 treesize of output 35 [2022-07-21 16:52:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:52:39,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:52:39,966 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1705 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|)) (<= (+ 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s2#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1705) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) 0) (not (<= |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134| |c_ULTIMATE.start_cstrncat_~s2#1.offset|)))) is different from false [2022-07-21 16:52:39,981 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1705 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|)) (<= (+ 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s2#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1705) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) 0) (< (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|))) is different from false [2022-07-21 16:52:40,631 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:40,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 34 [2022-07-21 16:52:40,643 INFO L356 Elim1Store]: treesize reduction 23, result has 46.5 percent of original size [2022-07-21 16:52:40,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 37 [2022-07-21 16:52:40,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:52:40,654 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:40,655 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 40 treesize of output 44 [2022-07-21 16:52:40,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 16:52:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 23 not checked. [2022-07-21 16:52:42,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642572208] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:52:42,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:52:42,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 27] total 78 [2022-07-21 16:52:42,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678519216] [2022-07-21 16:52:42,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:52:42,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-07-21 16:52:42,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:52:42,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-07-21 16:52:42,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=5320, Unknown=2, NotChecked=298, Total=6006 [2022-07-21 16:52:42,122 INFO L87 Difference]: Start difference. First operand 817 states and 910 transitions. Second operand has 78 states, 78 states have (on average 2.423076923076923) internal successors, (189), 78 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:46,752 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_1705 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|)) (<= (+ 2 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s2#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1705) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|) 0) (< (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1) |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_134|))))) (and .cse0 (or .cse0 (not (= (select |c_#valid| |c_ULTIMATE.start_cstrncat_#t~post4#1.base|) 1))))) is different from false [2022-07-21 16:52:50,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:52:50,726 INFO L93 Difference]: Finished difference Result 1008 states and 1100 transitions. [2022-07-21 16:52:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-21 16:52:50,727 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.423076923076923) internal successors, (189), 78 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-21 16:52:50,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:52:50,729 INFO L225 Difference]: With dead ends: 1008 [2022-07-21 16:52:50,729 INFO L226 Difference]: Without dead ends: 911 [2022-07-21 16:52:50,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 91 SyntacticMatches, 8 SemanticMatches, 140 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4621 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1753, Invalid=17438, Unknown=3, NotChecked=828, Total=20022 [2022-07-21 16:52:50,730 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 489 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 3159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1375 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 16:52:50,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 956 Invalid, 3159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1614 Invalid, 0 Unknown, 1375 Unchecked, 0.7s Time] [2022-07-21 16:52:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-07-21 16:52:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 843. [2022-07-21 16:52:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 839 states have (on average 1.1108462455303934) internal successors, (932), 842 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:50,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 932 transitions. [2022-07-21 16:52:50,736 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 932 transitions. Word has length 67 [2022-07-21 16:52:50,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:52:50,736 INFO L495 AbstractCegarLoop]: Abstraction has 843 states and 932 transitions. [2022-07-21 16:52:50,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.423076923076923) internal successors, (189), 78 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 932 transitions. [2022-07-21 16:52:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 16:52:50,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:52:50,737 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 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] [2022-07-21 16:52:50,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-21 16:52:50,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-21 16:52:50,952 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:52:50,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:52:50,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1839858857, now seen corresponding path program 4 times [2022-07-21 16:52:50,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:52:50,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606880366] [2022-07-21 16:52:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:52:50,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:52:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:52:51,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:52:51,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606880366] [2022-07-21 16:52:51,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606880366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:52:51,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220142872] [2022-07-21 16:52:51,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:52:51,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:51,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:52:51,145 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:52:51,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-21 16:52:51,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:52:51,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:52:51,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-21 16:52:51,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:52:51,280 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:52:51,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:52:51,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-21 16:52:51,588 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:52:51,588 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 19 treesize of output 25 [2022-07-21 16:52:51,619 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 3 [2022-07-21 16:52:51,922 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:51,922 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 22 [2022-07-21 16:52:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 16:52:52,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:52:53,058 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:53,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-21 16:52:53,063 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:52:53,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-21 16:52:53,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 16:52:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 16:52:53,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220142872] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:52:53,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:52:53,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 21] total 58 [2022-07-21 16:52:53,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106290540] [2022-07-21 16:52:53,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:52:53,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-21 16:52:53,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:52:53,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-21 16:52:53,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=3120, Unknown=0, NotChecked=0, Total=3422 [2022-07-21 16:52:53,636 INFO L87 Difference]: Start difference. First operand 843 states and 932 transitions. Second operand has 59 states, 58 states have (on average 2.7241379310344827) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:52:56,746 INFO L93 Difference]: Finished difference Result 1116 states and 1217 transitions. [2022-07-21 16:52:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-21 16:52:56,746 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 2.7241379310344827) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-21 16:52:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:52:56,749 INFO L225 Difference]: With dead ends: 1116 [2022-07-21 16:52:56,749 INFO L226 Difference]: Without dead ends: 1102 [2022-07-21 16:52:56,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5296 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1660, Invalid=15370, Unknown=0, NotChecked=0, Total=17030 [2022-07-21 16:52:56,750 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 182 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 436 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:52:56,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 698 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 605 Invalid, 0 Unknown, 436 Unchecked, 0.3s Time] [2022-07-21 16:52:56,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-07-21 16:52:56,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 867. [2022-07-21 16:52:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 863 states have (on average 1.111239860950174) internal successors, (959), 866 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 959 transitions. [2022-07-21 16:52:56,756 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 959 transitions. Word has length 68 [2022-07-21 16:52:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:52:56,756 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 959 transitions. [2022-07-21 16:52:56,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 2.7241379310344827) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:52:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 959 transitions. [2022-07-21 16:52:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 16:52:56,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:52:56,757 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:52:56,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-21 16:52:56,957 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,SelfDestructingSolverStorable57 [2022-07-21 16:52:56,957 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:52:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:52:56,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1839867893, now seen corresponding path program 2 times [2022-07-21 16:52:56,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:52:56,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675171200] [2022-07-21 16:52:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:52:56,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:52:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:52:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 70 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:52:57,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:52:57,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675171200] [2022-07-21 16:52:57,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675171200] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:52:57,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584015484] [2022-07-21 16:52:57,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:52:57,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:52:57,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:52:57,211 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:52:57,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-21 16:52:57,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:52:57,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:52:57,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-21 16:52:57,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:52:57,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:52:57,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:52:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:52:58,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:52:58,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:52:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 45 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:52:58,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584015484] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:52:58,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:52:58,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 19] total 53 [2022-07-21 16:52:58,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473130305] [2022-07-21 16:52:58,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:52:58,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-21 16:52:58,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:52:58,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-21 16:52:58,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2543, Unknown=0, NotChecked=0, Total=2862 [2022-07-21 16:52:58,778 INFO L87 Difference]: Start difference. First operand 867 states and 959 transitions. Second operand has 54 states, 53 states have (on average 3.4339622641509435) internal successors, (182), 54 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:53:00,807 INFO L93 Difference]: Finished difference Result 1245 states and 1336 transitions. [2022-07-21 16:53:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 16:53:00,807 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 3.4339622641509435) internal successors, (182), 54 states have internal predecessors, (182), 0 states have call successors, (0), 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 [2022-07-21 16:53:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:53:00,810 INFO L225 Difference]: With dead ends: 1245 [2022-07-21 16:53:00,810 INFO L226 Difference]: Without dead ends: 1214 [2022-07-21 16:53:00,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1384, Invalid=5926, Unknown=0, NotChecked=0, Total=7310 [2022-07-21 16:53:00,810 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 565 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:53:00,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 641 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 16:53:00,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-07-21 16:53:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 826. [2022-07-21 16:53:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 822 states have (on average 1.1131386861313868) internal successors, (915), 825 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:00,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 915 transitions. [2022-07-21 16:53:00,817 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 915 transitions. Word has length 68 [2022-07-21 16:53:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:53:00,817 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 915 transitions. [2022-07-21 16:53:00,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 3.4339622641509435) internal successors, (182), 54 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:00,818 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 915 transitions. [2022-07-21 16:53:00,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-21 16:53:00,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:53:00,818 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:53:00,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-21 16:53:01,031 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,SelfDestructingSolverStorable58 [2022-07-21 16:53:01,031 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:53:01,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:53:01,032 INFO L85 PathProgramCache]: Analyzing trace with hash -735626849, now seen corresponding path program 17 times [2022-07-21 16:53:01,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:53:01,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506446266] [2022-07-21 16:53:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:53:01,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:53:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:53:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 91 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:53:01,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:53:01,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506446266] [2022-07-21 16:53:01,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506446266] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:53:01,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556752721] [2022-07-21 16:53:01,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:53:01,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:53:01,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:53:01,343 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:53:01,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-21 16:53:01,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-21 16:53:01,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:53:01,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-21 16:53:01,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:53:01,551 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:53:01,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:53:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 120 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:53:02,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:53:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 153 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:53:04,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556752721] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:53:04,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:53:04,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 72 [2022-07-21 16:53:04,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832629559] [2022-07-21 16:53:04,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:53:04,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-21 16:53:04,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:53:04,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-21 16:53:04,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=4744, Unknown=0, NotChecked=0, Total=5256 [2022-07-21 16:53:04,139 INFO L87 Difference]: Start difference. First operand 826 states and 915 transitions. Second operand has 73 states, 72 states have (on average 2.7916666666666665) internal successors, (201), 73 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:06,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:53:06,763 INFO L93 Difference]: Finished difference Result 2036 states and 2172 transitions. [2022-07-21 16:53:06,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-21 16:53:06,763 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 2.7916666666666665) internal successors, (201), 73 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-21 16:53:06,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:53:06,767 INFO L225 Difference]: With dead ends: 2036 [2022-07-21 16:53:06,767 INFO L226 Difference]: Without dead ends: 2008 [2022-07-21 16:53:06,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3276 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2140, Invalid=13112, Unknown=0, NotChecked=0, Total=15252 [2022-07-21 16:53:06,768 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 1023 mSDsluCounter, 2468 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 2580 SdHoareTripleChecker+Invalid, 3217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1236 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 16:53:06,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 2580 Invalid, 3217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1809 Invalid, 0 Unknown, 1236 Unchecked, 0.7s Time] [2022-07-21 16:53:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2022-07-21 16:53:06,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 940. [2022-07-21 16:53:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 936 states have (on average 1.1025641025641026) internal successors, (1032), 939 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1032 transitions. [2022-07-21 16:53:06,778 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1032 transitions. Word has length 69 [2022-07-21 16:53:06,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:53:06,778 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1032 transitions. [2022-07-21 16:53:06,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 2.7916666666666665) internal successors, (201), 73 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:06,778 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1032 transitions. [2022-07-21 16:53:06,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-21 16:53:06,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:53:06,779 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:53:06,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-21 16:53:06,979 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,SelfDestructingSolverStorable59 [2022-07-21 16:53:06,979 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:53:06,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:53:06,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1873160609, now seen corresponding path program 1 times [2022-07-21 16:53:06,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:53:06,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042047861] [2022-07-21 16:53:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:53:06,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:53:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:53:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 91 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:53:07,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:53:07,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042047861] [2022-07-21 16:53:07,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042047861] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:53:07,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632907461] [2022-07-21 16:53:07,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:53:07,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:53:07,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:53:07,283 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:53:07,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-21 16:53:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:53:07,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-21 16:53:07,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:53:07,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:53:07,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:53:07,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:53:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 120 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:53:08,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:53:08,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 153 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:53:08,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632907461] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:53:08,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:53:08,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 66 [2022-07-21 16:53:08,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383397226] [2022-07-21 16:53:08,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:53:08,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-21 16:53:08,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:53:08,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-21 16:53:08,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2022-07-21 16:53:08,953 INFO L87 Difference]: Start difference. First operand 940 states and 1032 transitions. Second operand has 67 states, 66 states have (on average 2.984848484848485) internal successors, (197), 67 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:11,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:53:11,056 INFO L93 Difference]: Finished difference Result 1984 states and 2117 transitions. [2022-07-21 16:53:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 16:53:11,056 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.984848484848485) internal successors, (197), 67 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-21 16:53:11,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:53:11,059 INFO L225 Difference]: With dead ends: 1984 [2022-07-21 16:53:11,059 INFO L226 Difference]: Without dead ends: 1984 [2022-07-21 16:53:11,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1734, Invalid=7772, Unknown=0, NotChecked=0, Total=9506 [2022-07-21 16:53:11,060 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 937 mSDsluCounter, 2124 mSDsCounter, 0 mSdLazyCounter, 2892 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 2892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:53:11,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [937 Valid, 2237 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 2892 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-21 16:53:11,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-07-21 16:53:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 897. [2022-07-21 16:53:11,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.1063829787234043) internal successors, (988), 896 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 988 transitions. [2022-07-21 16:53:11,085 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 988 transitions. Word has length 69 [2022-07-21 16:53:11,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:53:11,085 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 988 transitions. [2022-07-21 16:53:11,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.984848484848485) internal successors, (197), 67 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 988 transitions. [2022-07-21 16:53:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 16:53:11,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:53:11,086 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:53:11,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-21 16:53:11,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:53:11,286 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:53:11,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:53:11,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1732202552, now seen corresponding path program 18 times [2022-07-21 16:53:11,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:53:11,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444339510] [2022-07-21 16:53:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:53:11,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:53:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:53:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 30 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:53:11,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:53:11,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444339510] [2022-07-21 16:53:11,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444339510] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:53:11,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681552267] [2022-07-21 16:53:11,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:53:11,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:53:11,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:53:11,677 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:53:11,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-21 16:53:11,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-21 16:53:11,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:53:11,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-21 16:53:11,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:53:12,395 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 [2022-07-21 16:53:12,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:53:12,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-21 16:53:13,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:53:13,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:13,174 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-21 16:53:13,174 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 35 treesize of output 21 [2022-07-21 16:53:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 30 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:53:13,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:53:13,360 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 16:53:13,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-07-21 16:53:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 32 proven. 241 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:53:13,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681552267] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:53:13,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:53:13,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29, 28] total 68 [2022-07-21 16:53:13,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238246699] [2022-07-21 16:53:13,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:53:13,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-21 16:53:13,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:53:13,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-21 16:53:13,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4345, Unknown=0, NotChecked=0, Total=4556 [2022-07-21 16:53:13,982 INFO L87 Difference]: Start difference. First operand 897 states and 988 transitions. Second operand has 68 states, 68 states have (on average 2.6470588235294117) internal successors, (180), 68 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:53:16,494 INFO L93 Difference]: Finished difference Result 2252 states and 2401 transitions. [2022-07-21 16:53:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-21 16:53:16,494 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.6470588235294117) internal successors, (180), 68 states have internal predecessors, (180), 0 states have call successors, (0), 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 71 [2022-07-21 16:53:16,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:53:16,497 INFO L225 Difference]: With dead ends: 2252 [2022-07-21 16:53:16,497 INFO L226 Difference]: Without dead ends: 2144 [2022-07-21 16:53:16,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=501, Invalid=10005, Unknown=0, NotChecked=0, Total=10506 [2022-07-21 16:53:16,497 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 358 mSDsluCounter, 5542 mSDsCounter, 0 mSdLazyCounter, 3643 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 5691 SdHoareTripleChecker+Invalid, 5344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 3643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1637 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:53:16,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 5691 Invalid, 5344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 3643 Invalid, 0 Unknown, 1637 Unchecked, 1.2s Time] [2022-07-21 16:53:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2022-07-21 16:53:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 945. [2022-07-21 16:53:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 941 states have (on average 1.1115834218916048) internal successors, (1046), 944 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1046 transitions. [2022-07-21 16:53:16,506 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1046 transitions. Word has length 71 [2022-07-21 16:53:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:53:16,506 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 1046 transitions. [2022-07-21 16:53:16,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.6470588235294117) internal successors, (180), 68 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1046 transitions. [2022-07-21 16:53:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 16:53:16,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:53:16,507 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:53:16,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-21 16:53:16,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:53:16,708 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:53:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:53:16,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1331430955, now seen corresponding path program 3 times [2022-07-21 16:53:16,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:53:16,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25268510] [2022-07-21 16:53:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:53:16,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:53:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:53:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 32 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:53:17,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:53:17,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25268510] [2022-07-21 16:53:17,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25268510] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:53:17,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17057568] [2022-07-21 16:53:17,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:53:17,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:53:17,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:53:17,035 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:53:17,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-21 16:53:17,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-21 16:53:17,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:53:17,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-21 16:53:17,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:53:17,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:53:17,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:53:17,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:53:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 45 proven. 77 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:53:17,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:53:18,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 66 proven. 56 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:53:18,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17057568] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:53:18,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:53:18,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 59 [2022-07-21 16:53:18,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545687882] [2022-07-21 16:53:18,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:53:18,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-21 16:53:18,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:53:18,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-21 16:53:18,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=3083, Unknown=0, NotChecked=0, Total=3540 [2022-07-21 16:53:18,721 INFO L87 Difference]: Start difference. First operand 945 states and 1046 transitions. Second operand has 60 states, 59 states have (on average 3.389830508474576) internal successors, (200), 60 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:21,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:53:21,427 INFO L93 Difference]: Finished difference Result 1474 states and 1583 transitions. [2022-07-21 16:53:21,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-21 16:53:21,428 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.389830508474576) internal successors, (200), 60 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-07-21 16:53:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:53:21,429 INFO L225 Difference]: With dead ends: 1474 [2022-07-21 16:53:21,429 INFO L226 Difference]: Without dead ends: 1439 [2022-07-21 16:53:21,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2272, Invalid=8648, Unknown=0, NotChecked=0, Total=10920 [2022-07-21 16:53:21,430 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 815 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 2449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 16:53:21,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [815 Valid, 1084 Invalid, 2449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2294 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 16:53:21,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2022-07-21 16:53:21,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 918. [2022-07-21 16:53:21,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 914 states have (on average 1.1159737417943107) internal successors, (1020), 917 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:21,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1020 transitions. [2022-07-21 16:53:21,436 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1020 transitions. Word has length 74 [2022-07-21 16:53:21,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:53:21,436 INFO L495 AbstractCegarLoop]: Abstraction has 918 states and 1020 transitions. [2022-07-21 16:53:21,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.389830508474576) internal successors, (200), 60 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:21,436 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1020 transitions. [2022-07-21 16:53:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-21 16:53:21,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:53:21,444 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:53:21,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-21 16:53:21,659 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,SelfDestructingSolverStorable62 [2022-07-21 16:53:21,659 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:53:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:53:21,660 INFO L85 PathProgramCache]: Analyzing trace with hash 577225621, now seen corresponding path program 19 times [2022-07-21 16:53:21,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:53:21,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593372328] [2022-07-21 16:53:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:53:21,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:53:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:53:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 120 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:53:21,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:53:21,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593372328] [2022-07-21 16:53:21,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593372328] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:53:21,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117695047] [2022-07-21 16:53:21,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:53:21,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:53:21,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:53:21,995 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:53:21,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-21 16:53:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:53:22,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-21 16:53:22,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:53:22,193 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:53:22,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:53:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 153 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:53:23,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:53:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 190 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:53:25,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117695047] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:53:25,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:53:25,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 28] total 80 [2022-07-21 16:53:25,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538632978] [2022-07-21 16:53:25,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:53:25,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-21 16:53:25,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:53:25,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-21 16:53:25,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=5864, Unknown=0, NotChecked=0, Total=6480 [2022-07-21 16:53:25,056 INFO L87 Difference]: Start difference. First operand 918 states and 1020 transitions. Second operand has 81 states, 80 states have (on average 2.7375) internal successors, (219), 81 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:28,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:53:28,738 INFO L93 Difference]: Finished difference Result 2198 states and 2353 transitions. [2022-07-21 16:53:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-21 16:53:28,739 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 2.7375) internal successors, (219), 81 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-21 16:53:28,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:53:28,741 INFO L225 Difference]: With dead ends: 2198 [2022-07-21 16:53:28,741 INFO L226 Difference]: Without dead ends: 2172 [2022-07-21 16:53:28,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5590 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3045, Invalid=19007, Unknown=0, NotChecked=0, Total=22052 [2022-07-21 16:53:28,742 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 923 mSDsluCounter, 2976 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 3100 SdHoareTripleChecker+Invalid, 3936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1315 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 16:53:28,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 3100 Invalid, 3936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2471 Invalid, 0 Unknown, 1315 Unchecked, 0.9s Time] [2022-07-21 16:53:28,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2022-07-21 16:53:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 928. [2022-07-21 16:53:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 924 states have (on average 1.1158008658008658) internal successors, (1031), 927 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1031 transitions. [2022-07-21 16:53:28,757 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1031 transitions. Word has length 75 [2022-07-21 16:53:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:53:28,757 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1031 transitions. [2022-07-21 16:53:28,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 2.7375) internal successors, (219), 81 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:28,758 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1031 transitions. [2022-07-21 16:53:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-21 16:53:28,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:53:28,758 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:53:28,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-21 16:53:28,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:53:28,959 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:53:28,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:53:28,959 INFO L85 PathProgramCache]: Analyzing trace with hash -743511569, now seen corresponding path program 7 times [2022-07-21 16:53:28,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:53:28,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809781040] [2022-07-21 16:53:28,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:53:28,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:53:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:53:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 16:53:29,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:53:29,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809781040] [2022-07-21 16:53:29,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809781040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:53:29,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988403246] [2022-07-21 16:53:29,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:53:29,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:53:29,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:53:29,089 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:53:29,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-21 16:53:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:53:29,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-21 16:53:29,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:53:29,248 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:53:29,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:53:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 16:53:29,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:53:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 63 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 16:53:29,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988403246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:53:29,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:53:29,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2022-07-21 16:53:29,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159260693] [2022-07-21 16:53:29,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:53:29,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 16:53:29,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:53:29,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 16:53:29,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 16:53:29,664 INFO L87 Difference]: Start difference. First operand 928 states and 1031 transitions. Second operand has 35 states, 35 states have (on average 3.914285714285714) internal successors, (137), 35 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) [2022-07-21 16:53:30,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:53:30,272 INFO L93 Difference]: Finished difference Result 1551 states and 1700 transitions. [2022-07-21 16:53:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 16:53:30,272 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.914285714285714) internal successors, (137), 35 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 75 [2022-07-21 16:53:30,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:53:30,274 INFO L225 Difference]: With dead ends: 1551 [2022-07-21 16:53:30,274 INFO L226 Difference]: Without dead ends: 1264 [2022-07-21 16:53:30,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=871, Invalid=2789, Unknown=0, NotChecked=0, Total=3660 [2022-07-21 16:53:30,274 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 324 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:53:30,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 499 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 16:53:30,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-07-21 16:53:30,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1107. [2022-07-21 16:53:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1103 states have (on average 1.1124206708975521) internal successors, (1227), 1106 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1227 transitions. [2022-07-21 16:53:30,282 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1227 transitions. Word has length 75 [2022-07-21 16:53:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:53:30,282 INFO L495 AbstractCegarLoop]: Abstraction has 1107 states and 1227 transitions. [2022-07-21 16:53:30,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.914285714285714) internal successors, (137), 35 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) [2022-07-21 16:53:30,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1227 transitions. [2022-07-21 16:53:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-21 16:53:30,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:53:30,283 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:53:30,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-21 16:53:30,497 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,SelfDestructingSolverStorable64 [2022-07-21 16:53:30,497 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:53:30,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:53:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash 663041198, now seen corresponding path program 20 times [2022-07-21 16:53:30,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:53:30,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398826678] [2022-07-21 16:53:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:53:30,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:53:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:53:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 33 proven. 300 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:53:30,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:53:30,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398826678] [2022-07-21 16:53:30,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398826678] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:53:30,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161518778] [2022-07-21 16:53:30,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:53:30,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:53:30,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:53:30,975 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:53:30,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-21 16:53:31,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:53:31,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:53:31,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-21 16:53:31,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:53:31,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:53:31,532 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 [2022-07-21 16:53:31,579 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 [2022-07-21 16:53:31,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:53:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 33 proven. 300 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:53:31,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:53:31,793 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2247 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2247) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 10 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 16:53:31,796 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:53:31,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-21 16:53:31,800 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:53:31,801 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 [2022-07-21 16:53:31,803 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 [2022-07-21 16:53:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 33 proven. 300 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:53:32,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161518778] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:53:32,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:53:32,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 49 [2022-07-21 16:53:32,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033833007] [2022-07-21 16:53:32,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:53:32,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 16:53:32,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:53:32,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 16:53:32,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2126, Unknown=1, NotChecked=92, Total=2352 [2022-07-21 16:53:32,126 INFO L87 Difference]: Start difference. First operand 1107 states and 1227 transitions. Second operand has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:34,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:53:34,228 INFO L93 Difference]: Finished difference Result 2931 states and 3133 transitions. [2022-07-21 16:53:34,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-21 16:53:34,228 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 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 77 [2022-07-21 16:53:34,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:53:34,231 INFO L225 Difference]: With dead ends: 2931 [2022-07-21 16:53:34,231 INFO L226 Difference]: Without dead ends: 2840 [2022-07-21 16:53:34,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 126 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=297, Invalid=4818, Unknown=1, NotChecked=140, Total=5256 [2022-07-21 16:53:34,231 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 442 mSDsluCounter, 5162 mSDsCounter, 0 mSdLazyCounter, 4309 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 5339 SdHoareTripleChecker+Invalid, 4832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 4309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:53:34,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 5339 Invalid, 4832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 4309 Invalid, 0 Unknown, 469 Unchecked, 1.4s Time] [2022-07-21 16:53:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2022-07-21 16:53:34,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 1184. [2022-07-21 16:53:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1180 states have (on average 1.1177966101694916) internal successors, (1319), 1183 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:34,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1319 transitions. [2022-07-21 16:53:34,243 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1319 transitions. Word has length 77 [2022-07-21 16:53:34,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:53:34,243 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1319 transitions. [2022-07-21 16:53:34,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:34,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1319 transitions. [2022-07-21 16:53:34,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 16:53:34,244 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:53:34,245 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:53:34,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-21 16:53:34,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:53:34,459 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:53:34,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:53:34,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1245596556, now seen corresponding path program 8 times [2022-07-21 16:53:34,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:53:34,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182671928] [2022-07-21 16:53:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:53:34,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:53:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:53:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 30 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:53:35,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:53:35,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182671928] [2022-07-21 16:53:35,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182671928] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:53:35,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287421063] [2022-07-21 16:53:35,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:53:35,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:53:35,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:53:35,240 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:53:35,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-21 16:53:35,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:53:35,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:53:35,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-21 16:53:35,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:53:35,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:53:36,197 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-07-21 16:53:36,197 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 [2022-07-21 16:53:36,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:36,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:53:36,219 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 48 treesize of output 38 [2022-07-21 16:53:36,498 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 [2022-07-21 16:53:36,593 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 [2022-07-21 16:53:36,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-07-21 16:53:36,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:53:36,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:36,815 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:53:36,815 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 [2022-07-21 16:53:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 30 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:53:36,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:53:36,828 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2323 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2323) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2022-07-21 16:53:36,832 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2323 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2323) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2022-07-21 16:53:36,854 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2323 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2323) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~s2#1.offset|)) 0)) is different from false [2022-07-21 16:53:36,867 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2323 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2323) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 3)) 0)) is different from false [2022-07-21 16:53:36,920 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2323 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2323) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 3)) 0)) (= |c_ULTIMATE.start_cstrncat_#t~mem5#1| 0)) is different from false [2022-07-21 16:53:37,235 INFO L356 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2022-07-21 16:53:37,235 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 [2022-07-21 16:53:37,242 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:53:37,242 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 [2022-07-21 16:53:37,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:53:37,258 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 [2022-07-21 16:53:37,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:37,291 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:53:37,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 71 [2022-07-21 16:53:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 53 not checked. [2022-07-21 16:53:38,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287421063] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:53:38,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:53:38,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 29] total 78 [2022-07-21 16:53:38,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368288289] [2022-07-21 16:53:38,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:53:38,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-07-21 16:53:38,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:53:38,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-07-21 16:53:38,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=4852, Unknown=15, NotChecked=730, Total=6006 [2022-07-21 16:53:38,142 INFO L87 Difference]: Start difference. First operand 1184 states and 1319 transitions. Second operand has 78 states, 78 states have (on average 2.6923076923076925) internal successors, (210), 78 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:40,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:53:40,070 INFO L93 Difference]: Finished difference Result 1229 states and 1363 transitions. [2022-07-21 16:53:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 16:53:40,070 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.6923076923076925) internal successors, (210), 78 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-21 16:53:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:53:40,071 INFO L225 Difference]: With dead ends: 1229 [2022-07-21 16:53:40,071 INFO L226 Difference]: Without dead ends: 1199 [2022-07-21 16:53:40,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=890, Invalid=8621, Unknown=15, NotChecked=980, Total=10506 [2022-07-21 16:53:40,072 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 318 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 931 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:53:40,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 839 Invalid, 1867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 852 Invalid, 0 Unknown, 931 Unchecked, 0.4s Time] [2022-07-21 16:53:40,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-07-21 16:53:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1184. [2022-07-21 16:53:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1180 states have (on average 1.116949152542373) internal successors, (1318), 1183 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1318 transitions. [2022-07-21 16:53:40,079 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1318 transitions. Word has length 79 [2022-07-21 16:53:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:53:40,079 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1318 transitions. [2022-07-21 16:53:40,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.6923076923076925) internal successors, (210), 78 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1318 transitions. [2022-07-21 16:53:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 16:53:40,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:53:40,080 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:53:40,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-21 16:53:40,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:53:40,292 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:53:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:53:40,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1070218529, now seen corresponding path program 4 times [2022-07-21 16:53:40,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:53:40,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944542986] [2022-07-21 16:53:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:53:40,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:53:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:53:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 49 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:53:40,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:53:40,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944542986] [2022-07-21 16:53:40,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944542986] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:53:40,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044406905] [2022-07-21 16:53:40,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:53:40,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:53:40,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:53:40,610 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:53:40,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-21 16:53:40,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:53:40,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:53:40,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 113 conjunts are in the unsatisfiable core [2022-07-21 16:53:40,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:53:40,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:53:40,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:53:40,772 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 [2022-07-21 16:53:41,008 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 [2022-07-21 16:53:41,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:53:41,046 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 [2022-07-21 16:53:41,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:53:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:53:41,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:53:41,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:53:41,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:53:41,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:53:41,594 INFO L356 Elim1Store]: treesize reduction 23, result has 63.5 percent of original size [2022-07-21 16:53:41,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 58 [2022-07-21 16:53:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-21 16:53:42,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:53:45,887 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:53:45,887 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 105 treesize of output 63 [2022-07-21 16:53:45,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:45,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:45,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:45,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:45,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:45,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:45,905 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:53:45,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 115 treesize of output 145 [2022-07-21 16:53:45,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:45,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:45,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:45,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:45,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:45,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:45,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 45 treesize of output 29 [2022-07-21 16:53:47,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:53:47,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-21 16:53:47,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044406905] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:53:47,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:53:47,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 27] total 71 [2022-07-21 16:53:47,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653021484] [2022-07-21 16:53:47,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:53:47,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-21 16:53:47,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:53:47,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-21 16:53:47,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=4650, Unknown=2, NotChecked=0, Total=5112 [2022-07-21 16:53:47,677 INFO L87 Difference]: Start difference. First operand 1184 states and 1318 transitions. Second operand has 72 states, 71 states have (on average 2.3943661971830985) internal successors, (170), 72 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:53:52,811 INFO L93 Difference]: Finished difference Result 1433 states and 1572 transitions. [2022-07-21 16:53:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-21 16:53:52,811 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.3943661971830985) internal successors, (170), 72 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-21 16:53:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:53:52,813 INFO L225 Difference]: With dead ends: 1433 [2022-07-21 16:53:52,813 INFO L226 Difference]: Without dead ends: 1227 [2022-07-21 16:53:52,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4707 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2159, Invalid=17299, Unknown=2, NotChecked=0, Total=19460 [2022-07-21 16:53:52,814 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 164 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:53:52,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1296 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2126 Invalid, 0 Unknown, 412 Unchecked, 1.0s Time] [2022-07-21 16:53:52,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2022-07-21 16:53:52,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1069. [2022-07-21 16:53:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1065 states have (on average 1.1211267605633803) internal successors, (1194), 1068 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1194 transitions. [2022-07-21 16:53:52,821 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1194 transitions. Word has length 80 [2022-07-21 16:53:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:53:52,821 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 1194 transitions. [2022-07-21 16:53:52,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.3943661971830985) internal successors, (170), 72 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:53:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1194 transitions. [2022-07-21 16:53:52,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 16:53:52,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:53:52,822 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:53:52,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-21 16:53:53,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-07-21 16:53:53,022 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:53:53,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:53:53,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1700131356, now seen corresponding path program 5 times [2022-07-21 16:53:53,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:53:53,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445978170] [2022-07-21 16:53:53,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:53:53,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:53:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:53:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 6 proven. 86 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 16:53:53,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:53:53,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445978170] [2022-07-21 16:53:53,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445978170] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:53:53,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991336664] [2022-07-21 16:53:53,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:53:53,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:53:53,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:53:53,400 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:53:53,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-21 16:53:53,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-21 16:53:53,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:53:53,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-21 16:53:53,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:53:53,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:53:53,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:53:53,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:53:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 16:53:54,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:53:55,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:53:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 16:53:56,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991336664] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:53:56,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:53:56,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 23] total 63 [2022-07-21 16:53:56,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006416096] [2022-07-21 16:53:56,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:53:56,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-21 16:53:56,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:53:56,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-21 16:53:56,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=3622, Unknown=0, NotChecked=0, Total=4032 [2022-07-21 16:53:56,014 INFO L87 Difference]: Start difference. First operand 1069 states and 1194 transitions. Second operand has 64 states, 63 states have (on average 3.0952380952380953) internal successors, (195), 64 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:54:03,319 INFO L93 Difference]: Finished difference Result 1593 states and 1725 transitions. [2022-07-21 16:54:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-07-21 16:54:03,319 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.0952380952380953) internal successors, (195), 64 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-21 16:54:03,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:54:03,320 INFO L225 Difference]: With dead ends: 1593 [2022-07-21 16:54:03,321 INFO L226 Difference]: Without dead ends: 1593 [2022-07-21 16:54:03,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7927 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=5244, Invalid=23148, Unknown=0, NotChecked=0, Total=28392 [2022-07-21 16:54:03,322 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1993 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1993 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:54:03,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1993 Valid, 915 Invalid, 2609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 2178 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-21 16:54:03,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2022-07-21 16:54:03,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1042. [2022-07-21 16:54:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1038 states have (on average 1.1242774566473988) internal successors, (1167), 1041 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1167 transitions. [2022-07-21 16:54:03,329 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1167 transitions. Word has length 80 [2022-07-21 16:54:03,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:54:03,329 INFO L495 AbstractCegarLoop]: Abstraction has 1042 states and 1167 transitions. [2022-07-21 16:54:03,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.0952380952380953) internal successors, (195), 64 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:03,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1167 transitions. [2022-07-21 16:54:03,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-21 16:54:03,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:54:03,330 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:54:03,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-21 16:54:03,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-07-21 16:54:03,551 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:54:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:54:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1997607349, now seen corresponding path program 21 times [2022-07-21 16:54:03,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:54:03,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122177051] [2022-07-21 16:54:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:54:03,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:54:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:54:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 153 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:54:03,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:54:03,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122177051] [2022-07-21 16:54:03,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122177051] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:54:03,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47888505] [2022-07-21 16:54:03,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:54:03,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:54:03,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:54:03,959 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:54:03,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-21 16:54:04,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-21 16:54:04,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:54:04,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-21 16:54:04,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:54:04,261 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:54:04,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:54:05,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:54:05,206 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:05,206 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 [2022-07-21 16:54:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 190 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:54:05,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:54:06,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-07-21 16:54:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 231 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:54:07,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47888505] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:54:07,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:54:07,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31, 31] total 86 [2022-07-21 16:54:07,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863270335] [2022-07-21 16:54:07,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:54:07,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-21 16:54:07,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:54:07,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-21 16:54:07,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=847, Invalid=6635, Unknown=0, NotChecked=0, Total=7482 [2022-07-21 16:54:07,305 INFO L87 Difference]: Start difference. First operand 1042 states and 1167 transitions. Second operand has 87 states, 86 states have (on average 2.7325581395348837) internal successors, (235), 87 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:12,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:54:12,001 INFO L93 Difference]: Finished difference Result 2153 states and 2324 transitions. [2022-07-21 16:54:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-21 16:54:12,001 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 2.7325581395348837) internal successors, (235), 87 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-21 16:54:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:54:12,003 INFO L225 Difference]: With dead ends: 2153 [2022-07-21 16:54:12,003 INFO L226 Difference]: Without dead ends: 2109 [2022-07-21 16:54:12,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4828 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3462, Invalid=18590, Unknown=0, NotChecked=0, Total=22052 [2022-07-21 16:54:12,004 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 1148 mSDsluCounter, 2729 mSDsCounter, 0 mSdLazyCounter, 4988 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 2849 SdHoareTripleChecker+Invalid, 5349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 4988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-21 16:54:12,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1148 Valid, 2849 Invalid, 5349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 4988 Invalid, 0 Unknown, 155 Unchecked, 1.8s Time] [2022-07-21 16:54:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2022-07-21 16:54:12,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1214. [2022-07-21 16:54:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1210 states have (on average 1.1099173553719008) internal successors, (1343), 1213 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1343 transitions. [2022-07-21 16:54:12,015 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1343 transitions. Word has length 81 [2022-07-21 16:54:12,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:54:12,015 INFO L495 AbstractCegarLoop]: Abstraction has 1214 states and 1343 transitions. [2022-07-21 16:54:12,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 2.7325581395348837) internal successors, (235), 87 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:12,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1343 transitions. [2022-07-21 16:54:12,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-21 16:54:12,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:54:12,016 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:54:12,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-07-21 16:54:12,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-07-21 16:54:12,231 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:54:12,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:54:12,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2025764261, now seen corresponding path program 7 times [2022-07-21 16:54:12,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:54:12,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070407304] [2022-07-21 16:54:12,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:54:12,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:54:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:54:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 34 proven. 97 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:54:12,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:54:12,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070407304] [2022-07-21 16:54:12,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070407304] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:54:12,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517018009] [2022-07-21 16:54:12,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:54:12,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:54:12,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:54:12,898 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:54:12,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-21 16:54:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:54:13,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-21 16:54:13,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:54:13,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:54:13,686 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:54:13,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-07-21 16:54:13,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2022-07-21 16:54:13,908 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:54:13,909 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 21 treesize of output 27 [2022-07-21 16:54:14,090 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:54:14,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 27 [2022-07-21 16:54:14,280 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:54:14,280 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 21 treesize of output 27 [2022-07-21 16:54:14,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:54:14,477 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:14,477 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 [2022-07-21 16:54:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 17 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:54:14,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:54:14,903 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:14,904 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 20 treesize of output 24 [2022-07-21 16:54:15,647 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrncat_~s~0#1.base| Int)) (or (and (= |c_ULTIMATE.start_cstrncat_~s2#1.base| |ULTIMATE.start_cstrncat_~s~0#1.base|) (<= 0 (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 4)) (<= |c_ULTIMATE.start_cstrncat_~s2#1.offset| |c_ULTIMATE.start_cstrncat_~s~0#1.offset|)) (forall ((v_ArrVal_2604 (Array Int Int))) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2604) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 3)) 0)))) is different from false [2022-07-21 16:54:16,084 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:16,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:54:16,091 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:16,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:54:16,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:54:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 29 proven. 99 refuted. 1 times theorem prover too weak. 0 trivial. 4 not checked. [2022-07-21 16:54:16,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517018009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:54:16,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:54:16,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32, 33] total 92 [2022-07-21 16:54:16,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680509704] [2022-07-21 16:54:16,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:54:16,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-21 16:54:16,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:54:16,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-21 16:54:16,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=7686, Unknown=6, NotChecked=178, Total=8372 [2022-07-21 16:54:16,913 INFO L87 Difference]: Start difference. First operand 1214 states and 1343 transitions. Second operand has 92 states, 92 states have (on average 2.5217391304347827) internal successors, (232), 92 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:18,054 WARN L833 $PredicateComparison]: unable to prove that (and (<= 1 |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) (not (= |c_ULTIMATE.start_cstrncat_~s2#1.base| |c_ULTIMATE.start_cstrncat_~s~0#1.base|)) (exists ((|ULTIMATE.start_main_~length2~0#1| Int)) (and (<= |ULTIMATE.start_main_~length2~0#1| 5) (< 4 |ULTIMATE.start_main_~length2~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |ULTIMATE.start_main_~length2~0#1| (- 2) |c_ULTIMATE.start_cstrncat_~s2#1.offset|)) 0))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 3)) 0) (<= 1 |c_ULTIMATE.start_cstrncat_~s2#1.offset|) (forall ((|ULTIMATE.start_cstrncat_~s~0#1.base| Int)) (or (and (= |c_ULTIMATE.start_cstrncat_~s2#1.base| |ULTIMATE.start_cstrncat_~s~0#1.base|) (<= 0 (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 4)) (<= |c_ULTIMATE.start_cstrncat_~s2#1.offset| |c_ULTIMATE.start_cstrncat_~s~0#1.offset|)) (forall ((v_ArrVal_2604 (Array Int Int))) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2604) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 3)) 0)))) (<= |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) is different from false [2022-07-21 16:54:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:54:18,992 INFO L93 Difference]: Finished difference Result 1280 states and 1407 transitions. [2022-07-21 16:54:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 16:54:18,993 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.5217391304347827) internal successors, (232), 92 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-21 16:54:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:54:19,000 INFO L225 Difference]: With dead ends: 1280 [2022-07-21 16:54:19,000 INFO L226 Difference]: Without dead ends: 1189 [2022-07-21 16:54:19,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3291 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=971, Invalid=13072, Unknown=7, NotChecked=470, Total=14520 [2022-07-21 16:54:19,001 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 214 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 645 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:54:19,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 1058 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1008 Invalid, 0 Unknown, 645 Unchecked, 0.4s Time] [2022-07-21 16:54:19,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2022-07-21 16:54:19,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1183. [2022-07-21 16:54:19,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1179 states have (on average 1.1085665818490247) internal successors, (1307), 1182 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:19,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1307 transitions. [2022-07-21 16:54:19,009 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1307 transitions. Word has length 81 [2022-07-21 16:54:19,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:54:19,009 INFO L495 AbstractCegarLoop]: Abstraction has 1183 states and 1307 transitions. [2022-07-21 16:54:19,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.5217391304347827) internal successors, (232), 92 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:19,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1307 transitions. [2022-07-21 16:54:19,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 16:54:19,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:54:19,011 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:54:19,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-21 16:54:19,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:54:19,231 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:54:19,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:54:19,231 INFO L85 PathProgramCache]: Analyzing trace with hash 149719524, now seen corresponding path program 22 times [2022-07-21 16:54:19,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:54:19,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585589006] [2022-07-21 16:54:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:54:19,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:54:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:54:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 36 proven. 363 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:54:19,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:54:19,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585589006] [2022-07-21 16:54:19,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585589006] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:54:19,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218994344] [2022-07-21 16:54:19,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:54:19,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:54:19,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:54:19,719 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:54:19,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-21 16:54:19,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:54:19,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:54:19,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-21 16:54:19,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:54:19,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:54:19,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:54:20,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-21 16:54:20,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-21 16:54:21,504 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:21,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-21 16:54:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 146 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:54:21,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:54:22,513 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:22,514 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 [2022-07-21 16:54:22,520 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:22,520 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 [2022-07-21 16:54:22,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-21 16:54:23,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:54:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 136 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:54:23,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218994344] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:54:23,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:54:23,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33, 33] total 91 [2022-07-21 16:54:23,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092915027] [2022-07-21 16:54:23,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:54:23,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-07-21 16:54:23,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:54:23,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-07-21 16:54:23,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=7490, Unknown=0, NotChecked=0, Total=8190 [2022-07-21 16:54:23,953 INFO L87 Difference]: Start difference. First operand 1183 states and 1307 transitions. Second operand has 91 states, 91 states have (on average 2.5934065934065935) internal successors, (236), 91 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:27,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:54:27,270 INFO L93 Difference]: Finished difference Result 2795 states and 3003 transitions. [2022-07-21 16:54:27,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-21 16:54:27,270 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.5934065934065935) internal successors, (236), 91 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-07-21 16:54:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:54:27,273 INFO L225 Difference]: With dead ends: 2795 [2022-07-21 16:54:27,273 INFO L226 Difference]: Without dead ends: 2669 [2022-07-21 16:54:27,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4309 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1370, Invalid=16990, Unknown=0, NotChecked=0, Total=18360 [2022-07-21 16:54:27,274 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 447 mSDsluCounter, 5623 mSDsCounter, 0 mSdLazyCounter, 4239 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 5805 SdHoareTripleChecker+Invalid, 5131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 825 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:54:27,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 5805 Invalid, 5131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4239 Invalid, 0 Unknown, 825 Unchecked, 1.5s Time] [2022-07-21 16:54:27,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2022-07-21 16:54:27,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 1294. [2022-07-21 16:54:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1290 states have (on average 1.1124031007751938) internal successors, (1435), 1293 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:27,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1435 transitions. [2022-07-21 16:54:27,286 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1435 transitions. Word has length 83 [2022-07-21 16:54:27,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:54:27,286 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 1435 transitions. [2022-07-21 16:54:27,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.5934065934065935) internal successors, (236), 91 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:27,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1435 transitions. [2022-07-21 16:54:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 16:54:27,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:54:27,288 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:54:27,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-07-21 16:54:27,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:54:27,504 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:54:27,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:54:27,504 INFO L85 PathProgramCache]: Analyzing trace with hash -691146263, now seen corresponding path program 9 times [2022-07-21 16:54:27,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:54:27,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960293038] [2022-07-21 16:54:27,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:54:27,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:54:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:54:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 18 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:54:28,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:54:28,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960293038] [2022-07-21 16:54:28,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960293038] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:54:28,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180385012] [2022-07-21 16:54:28,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:54:28,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:54:28,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:54:28,158 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:54:28,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-21 16:54:28,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 16:54:28,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:54:28,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 113 conjunts are in the unsatisfiable core [2022-07-21 16:54:28,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:54:28,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:54:28,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:54:28,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:54:29,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:54:29,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:54:29,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:54:29,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:54:29,451 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:29,451 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 10 [2022-07-21 16:54:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 88 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 16:54:29,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:54:29,465 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2755) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2022-07-21 16:54:29,469 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2755) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2022-07-21 16:54:29,478 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2755) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~s2#1.offset|)) 0)) is different from false [2022-07-21 16:54:29,488 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2755) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 3)) 0)) is different from false [2022-07-21 16:54:29,497 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2755) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 4)) 0)) is different from false [2022-07-21 16:54:29,504 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_2755) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0)) is different from false [2022-07-21 16:54:29,508 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:29,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:54:29,512 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:29,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:54:29,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:54:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 58 not checked. [2022-07-21 16:54:29,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180385012] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:54:29,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:54:29,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 23, 20] total 66 [2022-07-21 16:54:29,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947507652] [2022-07-21 16:54:29,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:54:29,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 16:54:29,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:54:29,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 16:54:29,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3318, Unknown=6, NotChecked=726, Total=4290 [2022-07-21 16:54:29,838 INFO L87 Difference]: Start difference. First operand 1294 states and 1435 transitions. Second operand has 66 states, 66 states have (on average 2.878787878787879) internal successors, (190), 66 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:54:31,196 INFO L93 Difference]: Finished difference Result 1595 states and 1748 transitions. [2022-07-21 16:54:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 16:54:31,196 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.878787878787879) internal successors, (190), 66 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-07-21 16:54:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:54:31,197 INFO L225 Difference]: With dead ends: 1595 [2022-07-21 16:54:31,197 INFO L226 Difference]: Without dead ends: 1415 [2022-07-21 16:54:31,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 138 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 6 IntricatePredicates, 3 DeprecatedPredicates, 2336 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=455, Invalid=6535, Unknown=6, NotChecked=1014, Total=8010 [2022-07-21 16:54:31,198 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 130 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 569 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:54:31,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 984 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1320 Invalid, 0 Unknown, 569 Unchecked, 0.5s Time] [2022-07-21 16:54:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-07-21 16:54:31,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1366. [2022-07-21 16:54:31,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1362 states have (on average 1.1123348017621146) internal successors, (1515), 1365 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1515 transitions. [2022-07-21 16:54:31,222 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1515 transitions. Word has length 83 [2022-07-21 16:54:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:54:31,222 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 1515 transitions. [2022-07-21 16:54:31,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.878787878787879) internal successors, (190), 66 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1515 transitions. [2022-07-21 16:54:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-21 16:54:31,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:54:31,223 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:54:31,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-07-21 16:54:31,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:54:31,451 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:54:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:54:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash 536754370, now seen corresponding path program 8 times [2022-07-21 16:54:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:54:31,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50005025] [2022-07-21 16:54:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:54:31,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:54:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:54:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 15 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:54:32,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:54:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50005025] [2022-07-21 16:54:32,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50005025] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:54:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816489966] [2022-07-21 16:54:32,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:54:32,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:54:32,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:54:32,017 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:54:32,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-21 16:54:32,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:54:32,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:54:32,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-21 16:54:32,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:54:32,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:54:32,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:54:32,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:54:32,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:54:32,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:54:32,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 16:54:32,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:54:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 15 proven. 88 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-21 16:54:32,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:54:32,586 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2837 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2837) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2022-07-21 16:54:32,590 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2837 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2837) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2022-07-21 16:54:32,600 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2837 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2837) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~s2#1.offset|)) 0)) is different from false [2022-07-21 16:54:32,609 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2837 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2837) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 3)) 0)) is different from false [2022-07-21 16:54:32,620 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2837 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2837) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 4)) 0)) is different from false [2022-07-21 16:54:32,630 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2837 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_2837) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0)) is different from false [2022-07-21 16:54:32,633 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:32,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:54:32,637 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:32,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:54:32,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:54:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 47 trivial. 58 not checked. [2022-07-21 16:54:32,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816489966] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:54:32,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:54:32,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20, 20] total 47 [2022-07-21 16:54:32,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115177501] [2022-07-21 16:54:32,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:54:32,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-21 16:54:32,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:54:32,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-21 16:54:32,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1502, Unknown=6, NotChecked=498, Total=2162 [2022-07-21 16:54:32,820 INFO L87 Difference]: Start difference. First operand 1366 states and 1515 transitions. Second operand has 47 states, 47 states have (on average 3.297872340425532) internal successors, (155), 47 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:34,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:54:34,213 INFO L93 Difference]: Finished difference Result 1933 states and 2136 transitions. [2022-07-21 16:54:34,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 16:54:34,213 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.297872340425532) internal successors, (155), 47 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-07-21 16:54:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:54:34,215 INFO L225 Difference]: With dead ends: 1933 [2022-07-21 16:54:34,215 INFO L226 Difference]: Without dead ends: 1618 [2022-07-21 16:54:34,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 155 SyntacticMatches, 12 SemanticMatches, 65 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=327, Invalid=3351, Unknown=6, NotChecked=738, Total=4422 [2022-07-21 16:54:34,215 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 128 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 815 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 16:54:34,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1089 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2120 Invalid, 0 Unknown, 815 Unchecked, 0.7s Time] [2022-07-21 16:54:34,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2022-07-21 16:54:34,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1520. [2022-07-21 16:54:34,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1516 states have (on average 1.108839050131926) internal successors, (1681), 1519 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 1681 transitions. [2022-07-21 16:54:34,226 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 1681 transitions. Word has length 85 [2022-07-21 16:54:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:54:34,226 INFO L495 AbstractCegarLoop]: Abstraction has 1520 states and 1681 transitions. [2022-07-21 16:54:34,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.297872340425532) internal successors, (155), 47 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 1681 transitions. [2022-07-21 16:54:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-21 16:54:34,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:54:34,227 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:54:34,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-21 16:54:34,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:54:34,446 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:54:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:54:34,446 INFO L85 PathProgramCache]: Analyzing trace with hash -912664127, now seen corresponding path program 23 times [2022-07-21 16:54:34,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:54:34,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535141458] [2022-07-21 16:54:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:54:34,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:54:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:54:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 190 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:54:34,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:54:34,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535141458] [2022-07-21 16:54:34,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535141458] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:54:34,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139018736] [2022-07-21 16:54:34,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:54:34,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:54:34,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:54:34,877 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:54:34,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-21 16:54:35,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-21 16:54:35,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:54:35,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-21 16:54:35,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:54:35,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:54:35,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:54:35,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:54:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 231 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:54:36,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:54:37,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:54:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 276 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:54:37,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139018736] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:54:37,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:54:37,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 81 [2022-07-21 16:54:37,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474165283] [2022-07-21 16:54:37,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:54:37,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-21 16:54:37,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:54:37,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-21 16:54:37,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=816, Invalid=5826, Unknown=0, NotChecked=0, Total=6642 [2022-07-21 16:54:37,277 INFO L87 Difference]: Start difference. First operand 1520 states and 1681 transitions. Second operand has 82 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 82 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:39,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:54:39,708 INFO L93 Difference]: Finished difference Result 3319 states and 3587 transitions. [2022-07-21 16:54:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-21 16:54:39,708 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 82 states have internal predecessors, (241), 0 states have call successors, (0), 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 87 [2022-07-21 16:54:39,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:54:39,711 INFO L225 Difference]: With dead ends: 3319 [2022-07-21 16:54:39,712 INFO L226 Difference]: Without dead ends: 3249 [2022-07-21 16:54:39,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2311, Invalid=10121, Unknown=0, NotChecked=0, Total=12432 [2022-07-21 16:54:39,712 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 1021 mSDsluCounter, 3240 mSDsCounter, 0 mSdLazyCounter, 4330 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 3386 SdHoareTripleChecker+Invalid, 4485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 4330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:54:39,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1021 Valid, 3386 Invalid, 4485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 4330 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-21 16:54:39,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2022-07-21 16:54:39,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 1600. [2022-07-21 16:54:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1596 states have (on average 1.105263157894737) internal successors, (1764), 1599 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 1764 transitions. [2022-07-21 16:54:39,727 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 1764 transitions. Word has length 87 [2022-07-21 16:54:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:54:39,727 INFO L495 AbstractCegarLoop]: Abstraction has 1600 states and 1764 transitions. [2022-07-21 16:54:39,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 82 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:54:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 1764 transitions. [2022-07-21 16:54:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-21 16:54:39,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:54:39,729 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:54:39,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-21 16:54:39,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:54:39,945 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:54:39,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:54:39,945 INFO L85 PathProgramCache]: Analyzing trace with hash 373606022, now seen corresponding path program 10 times [2022-07-21 16:54:39,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:54:39,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235640892] [2022-07-21 16:54:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:54:39,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:54:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:54:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 16:54:40,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:54:40,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235640892] [2022-07-21 16:54:40,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235640892] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:54:40,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21233192] [2022-07-21 16:54:40,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:54:40,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:54:40,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:54:40,133 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:54:40,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-21 16:54:40,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:54:40,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:54:40,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-21 16:54:40,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:54:40,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:54:40,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:54:40,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-21 16:54:40,725 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 18 treesize of output 20 [2022-07-21 16:54:40,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 16:54:40,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 16:54:40,912 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 18 treesize of output 20 [2022-07-21 16:54:41,000 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:41,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-21 16:54:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 32 proven. 88 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 16:54:41,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:54:41,637 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2993 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_254| Int)) (or (<= (+ 6 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_254|) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s2#1.base|)) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_2993) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_254| 4))) (not (<= |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_254| |c_ULTIMATE.start_cstrncat_~s2#1.offset|)) (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_254|)))) is different from false [2022-07-21 16:54:41,665 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2993 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post4#1.offset_254| Int)) (or (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_254|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_2993) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_254| 4)) 0) (<= (+ 6 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_254|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post4#1.offset_254|)))) is different from false [2022-07-21 16:54:41,670 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:41,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:54:41,676 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:54:41,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-21 16:54:41,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 16:54:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 45 trivial. 10 not checked. [2022-07-21 16:54:42,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21233192] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:54:42,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:54:42,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 21] total 56 [2022-07-21 16:54:42,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295960465] [2022-07-21 16:54:42,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:54:42,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-21 16:54:42,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:54:42,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-21 16:54:42,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2661, Unknown=3, NotChecked=214, Total=3192 [2022-07-21 16:54:42,759 INFO L87 Difference]: Start difference. First operand 1600 states and 1764 transitions. Second operand has 57 states, 56 states have (on average 3.625) internal successors, (203), 57 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)