./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.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 dd76b7822e4f01d656aa547f942373edd42b5cbb2c90dd9f0d7299ee64d98734 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:23:41,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:23:41,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:23:41,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:23:41,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:23:41,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:23:41,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:23:41,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:23:41,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:23:41,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:23:41,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:23:41,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:23:41,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:23:41,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:23:41,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:23:41,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:23:41,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:23:41,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:23:41,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:23:41,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:23:41,201 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:23:41,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:23:41,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:23:41,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:23:41,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:23:41,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:23:41,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:23:41,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:23:41,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:23:41,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:23:41,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:23:41,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:23:41,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:23:41,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:23:41,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:23:41,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:23:41,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:23:41,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:23:41,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:23:41,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:23:41,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:23:41,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:23:41,232 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:23:41,262 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:23:41,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:23:41,263 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:23:41,263 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:23:41,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:23:41,264 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:23:41,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:23:41,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:23:41,264 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:23:41,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:23:41,265 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:23:41,265 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:23:41,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:23:41,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:23:41,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:23:41,266 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:23:41,266 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:23:41,266 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:23:41,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:23:41,266 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:23:41,267 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:23:41,267 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:23:41,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:23:41,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:23:41,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:23:41,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:23:41,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:23:41,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:23:41,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:23:41,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:23:41,269 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd76b7822e4f01d656aa547f942373edd42b5cbb2c90dd9f0d7299ee64d98734 [2022-07-12 18:23:41,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:23:41,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:23:41,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:23:41,475 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:23:41,476 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:23:41,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2022-07-12 18:23:41,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b71b440cc/b43e9fdc9b5449fcb9fa73e42f2663a3/FLAG61fcc5378 [2022-07-12 18:23:41,904 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:23:41,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2022-07-12 18:23:41,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b71b440cc/b43e9fdc9b5449fcb9fa73e42f2663a3/FLAG61fcc5378 [2022-07-12 18:23:41,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b71b440cc/b43e9fdc9b5449fcb9fa73e42f2663a3 [2022-07-12 18:23:41,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:23:41,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:23:41,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:23:41,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:23:41,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:23:41,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:23:41" (1/1) ... [2022-07-12 18:23:41,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b9e874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:23:41, skipping insertion in model container [2022-07-12 18:23:41,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:23:41" (1/1) ... [2022-07-12 18:23:41,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:23:41,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:23:42,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:23:42,188 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:23:42,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:23:42,243 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:23:42,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:23:42 WrapperNode [2022-07-12 18:23:42,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:23:42,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:23:42,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:23:42,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:23:42,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:23:42" (1/1) ... [2022-07-12 18:23:42,268 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:23:42" (1/1) ... [2022-07-12 18:23:42,286 INFO L137 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-07-12 18:23:42,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:23:42,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:23:42,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:23:42,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:23:42,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:23:42" (1/1) ... [2022-07-12 18:23:42,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:23:42" (1/1) ... [2022-07-12 18:23:42,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:23:42" (1/1) ... [2022-07-12 18:23:42,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:23:42" (1/1) ... [2022-07-12 18:23:42,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:23:42" (1/1) ... [2022-07-12 18:23:42,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:23:42" (1/1) ... [2022-07-12 18:23:42,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:23:42" (1/1) ... [2022-07-12 18:23:42,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:23:42,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:23:42,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:23:42,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:23:42,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:23:42" (1/1) ... [2022-07-12 18:23:42,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:23:42,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:42,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 18:23:42,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 18:23:42,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 18:23:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 18:23:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 18:23:42,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:23:42,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:23:42,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:23:42,457 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:23:42,458 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:23:42,608 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:23:42,611 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:23:42,612 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 18:23:42,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:23:42 BoogieIcfgContainer [2022-07-12 18:23:42,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:23:42,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:23:42,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:23:42,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:23:42,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:23:41" (1/3) ... [2022-07-12 18:23:42,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464d3cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:23:42, skipping insertion in model container [2022-07-12 18:23:42,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:23:42" (2/3) ... [2022-07-12 18:23:42,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464d3cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:23:42, skipping insertion in model container [2022-07-12 18:23:42,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:23:42" (3/3) ... [2022-07-12 18:23:42,621 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlen-alloca-1.i [2022-07-12 18:23:42,631 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:23:42,631 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2022-07-12 18:23:42,657 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:23:42,661 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@2308b93c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@36b4f5d9 [2022-07-12 18:23:42,661 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-12 18:23:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:42,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:23:42,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:42,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:23:42,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:42,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:42,677 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-07-12 18:23:42,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:42,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641637991] [2022-07-12 18:23:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:42,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:42,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:42,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641637991] [2022-07-12 18:23:42,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641637991] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:23:42,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:23:42,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:23:42,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438187439] [2022-07-12 18:23:42,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:23:42,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:23:42,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:42,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:23:42,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:23:42,857 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:42,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:42,893 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-07-12 18:23:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:23:42,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-12 18:23:42,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:42,900 INFO L225 Difference]: With dead ends: 42 [2022-07-12 18:23:42,900 INFO L226 Difference]: Without dead ends: 38 [2022-07-12 18:23:42,902 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 [2022-07-12 18:23:42,905 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:42,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 42 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:23:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-12 18:23:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2022-07-12 18:23:42,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.5) internal successors, (27), 24 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) [2022-07-12 18:23:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-07-12 18:23:42,927 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 6 [2022-07-12 18:23:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:42,928 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-07-12 18:23:42,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:42,928 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-07-12 18:23:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:23:42,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:42,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:23:42,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 18:23:42,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:42,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:42,931 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2022-07-12 18:23:42,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:42,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117309434] [2022-07-12 18:23:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:42,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:42,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:42,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117309434] [2022-07-12 18:23:42,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117309434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:23:42,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:23:42,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:23:42,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541800343] [2022-07-12 18:23:42,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:23:42,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:23:42,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:42,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:23:42,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:23:42,988 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:43,012 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-07-12 18:23:43,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:23:43,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-12 18:23:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:43,014 INFO L225 Difference]: With dead ends: 23 [2022-07-12 18:23:43,014 INFO L226 Difference]: Without dead ends: 23 [2022-07-12 18:23:43,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:23:43,018 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:43,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 17 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:23:43,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-12 18:23:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-12 18:23:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 22 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) [2022-07-12 18:23:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-07-12 18:23:43,024 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 6 [2022-07-12 18:23:43,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:43,024 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-07-12 18:23:43,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:43,025 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-07-12 18:23:43,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:23:43,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:43,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:23:43,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 18:23:43,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:43,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:43,029 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2022-07-12 18:23:43,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:43,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627265949] [2022-07-12 18:23:43,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:43,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:43,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:43,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627265949] [2022-07-12 18:23:43,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627265949] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:23:43,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:23:43,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:23:43,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911195947] [2022-07-12 18:23:43,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:23:43,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:23:43,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:43,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:23:43,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:23:43,082 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:43,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:43,101 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-07-12 18:23:43,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:23:43,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-12 18:23:43,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:43,102 INFO L225 Difference]: With dead ends: 22 [2022-07-12 18:23:43,102 INFO L226 Difference]: Without dead ends: 22 [2022-07-12 18:23:43,102 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 [2022-07-12 18:23:43,103 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:43,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 15 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:23:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-12 18:23:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-12 18:23:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:43,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-12 18:23:43,106 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 6 [2022-07-12 18:23:43,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:43,106 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-12 18:23:43,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-12 18:23:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:23:43,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:43,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:23:43,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 18:23:43,107 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:43,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:43,108 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-07-12 18:23:43,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:43,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185091292] [2022-07-12 18:23:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:43,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:43,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:43,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185091292] [2022-07-12 18:23:43,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185091292] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:23:43,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:23:43,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:23:43,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766215967] [2022-07-12 18:23:43,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:23:43,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:23:43,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:43,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:23:43,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:23:43,194 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:43,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:43,224 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-07-12 18:23:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:23:43,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-12 18:23:43,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:43,226 INFO L225 Difference]: With dead ends: 37 [2022-07-12 18:23:43,226 INFO L226 Difference]: Without dead ends: 37 [2022-07-12 18:23:43,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:23:43,233 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:43,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 25 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:23:43,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-12 18:23:43,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2022-07-12 18:23:43,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 23 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) [2022-07-12 18:23:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-12 18:23:43,241 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 6 [2022-07-12 18:23:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:43,241 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-12 18:23:43,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-12 18:23:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:23:43,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:43,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:43,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 18:23:43,244 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:43,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:43,245 INFO L85 PathProgramCache]: Analyzing trace with hash 119484120, now seen corresponding path program 1 times [2022-07-12 18:23:43,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:43,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558328501] [2022-07-12 18:23:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:43,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:43,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:43,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558328501] [2022-07-12 18:23:43,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558328501] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:23:43,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:23:43,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:23:43,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869334095] [2022-07-12 18:23:43,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:23:43,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:23:43,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:43,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:23:43,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:23:43,302 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2022-07-12 18:23:43,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:43,335 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-07-12 18:23:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:23:43,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 [2022-07-12 18:23:43,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:43,337 INFO L225 Difference]: With dead ends: 23 [2022-07-12 18:23:43,337 INFO L226 Difference]: Without dead ends: 23 [2022-07-12 18:23:43,338 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 [2022-07-12 18:23:43,338 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:43,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:23:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-12 18:23:43,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-12 18:23:43,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 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) [2022-07-12 18:23:43,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-12 18:23:43,342 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2022-07-12 18:23:43,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:43,342 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-12 18:23:43,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2022-07-12 18:23:43,342 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-12 18:23:43,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:23:43,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:43,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:43,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 18:23:43,345 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:43,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2022-07-12 18:23:43,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:43,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756253683] [2022-07-12 18:23:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:43,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:43,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:43,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756253683] [2022-07-12 18:23:43,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756253683] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:23:43,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:23:43,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:23:43,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469521544] [2022-07-12 18:23:43,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:23:43,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:23:43,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:23:43,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:23:43,425 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2022-07-12 18:23:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:43,468 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-07-12 18:23:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:23:43,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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 [2022-07-12 18:23:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:43,469 INFO L225 Difference]: With dead ends: 30 [2022-07-12 18:23:43,469 INFO L226 Difference]: Without dead ends: 30 [2022-07-12 18:23:43,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:23:43,470 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:43,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 25 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:23:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-12 18:23:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2022-07-12 18:23:43,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 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) [2022-07-12 18:23:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-12 18:23:43,472 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 8 [2022-07-12 18:23:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:43,473 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-12 18:23:43,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2022-07-12 18:23:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-12 18:23:43,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:23:43,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:43,473 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:43,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 18:23:43,474 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:43,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:43,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-07-12 18:23:43,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:43,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606882266] [2022-07-12 18:23:43,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:43,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:43,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:43,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606882266] [2022-07-12 18:23:43,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606882266] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:43,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261619021] [2022-07-12 18:23:43,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:43,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:43,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:43,545 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:43,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 18:23:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:43,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:23:43,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:43,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:23:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:43,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:43,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261619021] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:43,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:43,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-12 18:23:43,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91376929] [2022-07-12 18:23:43,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:43,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:23:43,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:23:43,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:23:43,835 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) 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) [2022-07-12 18:23:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:43,931 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-07-12 18:23:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:23:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) 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 10 [2022-07-12 18:23:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:43,933 INFO L225 Difference]: With dead ends: 48 [2022-07-12 18:23:43,933 INFO L226 Difference]: Without dead ends: 48 [2022-07-12 18:23:43,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:23:43,934 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:43,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 73 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:23:43,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-12 18:23:43,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 21. [2022-07-12 18:23:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 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) [2022-07-12 18:23:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-07-12 18:23:43,940 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2022-07-12 18:23:43,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:43,941 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-07-12 18:23:43,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) 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) [2022-07-12 18:23:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-07-12 18:23:43,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:23:43,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:43,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:43,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:44,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:44,142 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:44,143 INFO L85 PathProgramCache]: Analyzing trace with hash -976458485, now seen corresponding path program 1 times [2022-07-12 18:23:44,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:44,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540008916] [2022-07-12 18:23:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:44,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:44,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:44,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540008916] [2022-07-12 18:23:44,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540008916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:23:44,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:23:44,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:23:44,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898681380] [2022-07-12 18:23:44,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:23:44,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:23:44,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:44,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:23:44,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:23:44,231 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:44,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:44,286 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2022-07-12 18:23:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:23:44,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 18:23:44,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:44,287 INFO L225 Difference]: With dead ends: 29 [2022-07-12 18:23:44,288 INFO L226 Difference]: Without dead ends: 29 [2022-07-12 18:23:44,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:23:44,288 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 73 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 [2022-07-12 18:23:44,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 73 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:23:44,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-12 18:23:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-07-12 18:23:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 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) [2022-07-12 18:23:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-07-12 18:23:44,290 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 11 [2022-07-12 18:23:44,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:44,291 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-07-12 18:23:44,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:44,291 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-07-12 18:23:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:23:44,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:44,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:44,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 18:23:44,292 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:44,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:44,292 INFO L85 PathProgramCache]: Analyzing trace with hash -296400115, now seen corresponding path program 1 times [2022-07-12 18:23:44,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:44,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682273762] [2022-07-12 18:23:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:44,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:44,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:44,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682273762] [2022-07-12 18:23:44,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682273762] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:23:44,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:23:44,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 18:23:44,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699951292] [2022-07-12 18:23:44,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:23:44,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:23:44,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:44,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:23:44,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:23:44,378 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:44,486 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-07-12 18:23:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:23:44,487 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 18:23:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:44,488 INFO L225 Difference]: With dead ends: 37 [2022-07-12 18:23:44,488 INFO L226 Difference]: Without dead ends: 37 [2022-07-12 18:23:44,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:23:44,489 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:44,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 60 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:23:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-12 18:23:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2022-07-12 18:23:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-07-12 18:23:44,491 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2022-07-12 18:23:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:44,496 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-07-12 18:23:44,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-07-12 18:23:44,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:23:44,498 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:44,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:44,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 18:23:44,499 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:44,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:44,499 INFO L85 PathProgramCache]: Analyzing trace with hash -205497247, now seen corresponding path program 1 times [2022-07-12 18:23:44,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:44,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909328197] [2022-07-12 18:23:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:44,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:44,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:44,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909328197] [2022-07-12 18:23:44,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909328197] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:23:44,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:23:44,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:23:44,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654730585] [2022-07-12 18:23:44,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:23:44,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:23:44,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:44,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:23:44,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:23:44,551 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:44,560 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-07-12 18:23:44,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:23:44,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2022-07-12 18:23:44,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:44,561 INFO L225 Difference]: With dead ends: 25 [2022-07-12 18:23:44,561 INFO L226 Difference]: Without dead ends: 16 [2022-07-12 18:23:44,561 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 [2022-07-12 18:23:44,561 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:44,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 26 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:23:44,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-12 18:23:44,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-12 18:23:44,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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) [2022-07-12 18:23:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-07-12 18:23:44,563 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2022-07-12 18:23:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:44,564 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-07-12 18:23:44,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-07-12 18:23:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 18:23:44,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:44,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:44,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 18:23:44,565 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:44,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1218087850, now seen corresponding path program 1 times [2022-07-12 18:23:44,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:44,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241882554] [2022-07-12 18:23:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:44,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:44,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:44,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241882554] [2022-07-12 18:23:44,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241882554] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:44,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374363502] [2022-07-12 18:23:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:44,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:44,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:44,632 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:44,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 18:23:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:44,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 18:23:44,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:44,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:44,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-12 18:23:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:44,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374363502] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:44,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:44,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-07-12 18:23:44,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523087708] [2022-07-12 18:23:44,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:44,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:23:44,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:44,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:23:44,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:23:44,836 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:44,960 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-07-12 18:23:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:23:44,961 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2022-07-12 18:23:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:44,961 INFO L225 Difference]: With dead ends: 24 [2022-07-12 18:23:44,962 INFO L226 Difference]: Without dead ends: 24 [2022-07-12 18:23:44,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:23:44,962 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 73 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:44,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 40 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:23:44,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-12 18:23:44,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2022-07-12 18:23:44,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:44,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-07-12 18:23:44,964 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2022-07-12 18:23:44,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:44,965 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-07-12 18:23:44,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:44,965 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-07-12 18:23:44,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 18:23:44,965 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:44,966 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:44,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:45,179 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,SelfDestructingSolverStorable10 [2022-07-12 18:23:45,180 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:45,180 INFO L85 PathProgramCache]: Analyzing trace with hash -123563366, now seen corresponding path program 2 times [2022-07-12 18:23:45,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:45,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899813999] [2022-07-12 18:23:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:45,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:45,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:45,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899813999] [2022-07-12 18:23:45,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899813999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:45,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703868517] [2022-07-12 18:23:45,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:23:45,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:45,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:45,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:45,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 18:23:45,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:23:45,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:45,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 18:23:45,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:45,362 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 [2022-07-12 18:23:45,515 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:45,515 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 18 [2022-07-12 18:23:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:45,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:45,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:23:45,788 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 [2022-07-12 18:23:45,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:23:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:45,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703868517] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:45,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:45,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-07-12 18:23:45,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644685107] [2022-07-12 18:23:45,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:45,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 18:23:45,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:45,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 18:23:45,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:23:45,810 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:46,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:46,026 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2022-07-12 18:23:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 18:23:46,027 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2022-07-12 18:23:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:46,027 INFO L225 Difference]: With dead ends: 38 [2022-07-12 18:23:46,027 INFO L226 Difference]: Without dead ends: 31 [2022-07-12 18:23:46,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 18:23:46,028 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:46,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 93 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-07-12 18:23:46,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-12 18:23:46,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-07-12 18:23:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 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) [2022-07-12 18:23:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-07-12 18:23:46,030 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2022-07-12 18:23:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:46,030 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-07-12 18:23:46,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-07-12 18:23:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:23:46,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:46,031 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:46,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:46,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:46,239 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:46,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1941489159, now seen corresponding path program 3 times [2022-07-12 18:23:46,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:46,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267955578] [2022-07-12 18:23:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:46,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:46,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:46,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267955578] [2022-07-12 18:23:46,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267955578] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:46,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266142297] [2022-07-12 18:23:46,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:23:46,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:46,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:46,372 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:46,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 18:23:46,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 18:23:46,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:46,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-12 18:23:46,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:46,507 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 [2022-07-12 18:23:46,593 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 [2022-07-12 18:23:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:46,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:46,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:23:46,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:23:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:46,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266142297] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:46,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:46,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-07-12 18:23:46,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733111032] [2022-07-12 18:23:46,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:46,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 18:23:46,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:46,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 18:23:46,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:23:46,729 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:46,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:46,913 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-07-12 18:23:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:23:46,913 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-12 18:23:46,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:46,913 INFO L225 Difference]: With dead ends: 43 [2022-07-12 18:23:46,914 INFO L226 Difference]: Without dead ends: 33 [2022-07-12 18:23:46,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:23:46,914 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:46,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 94 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 171 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-07-12 18:23:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-12 18:23:46,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-07-12 18:23:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-07-12 18:23:46,916 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2022-07-12 18:23:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:46,916 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-07-12 18:23:46,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:46,916 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-07-12 18:23:46,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 18:23:46,917 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:46,917 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:46,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:47,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:47,123 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:47,124 INFO L85 PathProgramCache]: Analyzing trace with hash -413257756, now seen corresponding path program 4 times [2022-07-12 18:23:47,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:47,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193357650] [2022-07-12 18:23:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:47,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:47,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:47,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193357650] [2022-07-12 18:23:47,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193357650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:47,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879651420] [2022-07-12 18:23:47,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:23:47,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:47,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:47,242 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:47,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 18:23:47,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:23:47,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:47,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 18:23:47,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:47,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:23:47,400 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 [2022-07-12 18:23:47,519 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:47,520 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 19 treesize of output 19 [2022-07-12 18:23:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:47,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:47,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:23:47,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:23:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:48,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879651420] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:48,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:48,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 32 [2022-07-12 18:23:48,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838457403] [2022-07-12 18:23:48,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:48,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 18:23:48,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 18:23:48,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 18:23:48,129 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 33 states, 32 states have (on average 2.40625) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:48,674 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2022-07-12 18:23:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:23:48,675 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.40625) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 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 [2022-07-12 18:23:48,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:48,675 INFO L225 Difference]: With dead ends: 38 [2022-07-12 18:23:48,675 INFO L226 Difference]: Without dead ends: 38 [2022-07-12 18:23:48,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 18:23:48,676 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 93 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:48,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 121 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 335 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2022-07-12 18:23:48,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-12 18:23:48,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-07-12 18:23:48,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:48,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-07-12 18:23:48,678 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2022-07-12 18:23:48,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:48,679 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-07-12 18:23:48,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.40625) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:48,679 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-07-12 18:23:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 18:23:48,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:48,683 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:48,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:48,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 18:23:48,892 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:48,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:48,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1453066652, now seen corresponding path program 5 times [2022-07-12 18:23:48,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:48,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524923116] [2022-07-12 18:23:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:48,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:49,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:49,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524923116] [2022-07-12 18:23:49,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524923116] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:49,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643709126] [2022-07-12 18:23:49,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:23:49,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:49,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:49,010 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:49,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 18:23:49,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-12 18:23:49,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:49,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 18:23:49,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:49,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:23:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:49,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:49,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643709126] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:49,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:49,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-07-12 18:23:49,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77350030] [2022-07-12 18:23:49,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:49,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 18:23:49,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:49,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 18:23:49,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:23:49,409 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:49,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:23:49,594 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-07-12 18:23:49,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:23:49,594 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-12 18:23:49,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:23:49,595 INFO L225 Difference]: With dead ends: 58 [2022-07-12 18:23:49,595 INFO L226 Difference]: Without dead ends: 43 [2022-07-12 18:23:49,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:23:49,595 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:23:49,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 99 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:23:49,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-12 18:23:49,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-07-12 18:23:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 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) [2022-07-12 18:23:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-07-12 18:23:49,598 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2022-07-12 18:23:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:23:49,598 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-07-12 18:23:49,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:23:49,598 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-07-12 18:23:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 18:23:49,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:23:49,598 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:23:49,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:23:49,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-12 18:23:49,799 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:23:49,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:23:49,799 INFO L85 PathProgramCache]: Analyzing trace with hash -376934399, now seen corresponding path program 6 times [2022-07-12 18:23:49,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:23:49,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059628342] [2022-07-12 18:23:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:23:49,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:23:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:23:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:49,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:23:49,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059628342] [2022-07-12 18:23:49,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059628342] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:23:49,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183710826] [2022-07-12 18:23:49,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:23:49,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:23:49,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:23:50,009 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:23:50,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 18:23:50,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-12 18:23:50,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:23:50,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-12 18:23:50,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:23:50,153 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 [2022-07-12 18:23:50,439 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:23:50,439 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 18 [2022-07-12 18:23:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:50,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:23:50,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:23:50,949 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 16 treesize of output 12 [2022-07-12 18:23:50,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:23:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:23:50,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183710826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:23:50,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:23:50,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2022-07-12 18:23:50,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560338543] [2022-07-12 18:23:50,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:23:50,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 18:23:50,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:23:50,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 18:23:50,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1496, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 18:23:50,986 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 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) [2022-07-12 18:24:03,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:03,263 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2022-07-12 18:24:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 18:24:03,264 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 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 39 [2022-07-12 18:24:03,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:03,264 INFO L225 Difference]: With dead ends: 68 [2022-07-12 18:24:03,264 INFO L226 Difference]: Without dead ends: 52 [2022-07-12 18:24:03,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 57 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=349, Invalid=3073, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 18:24:03,266 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:03,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 267 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 339 Invalid, 0 Unknown, 141 Unchecked, 0.1s Time] [2022-07-12 18:24:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-12 18:24:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-07-12 18:24:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-07-12 18:24:03,268 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 39 [2022-07-12 18:24:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:03,268 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-07-12 18:24:03,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 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) [2022-07-12 18:24:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-07-12 18:24:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 18:24:03,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:03,269 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:03,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-12 18:24:03,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:03,470 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:03,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:03,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1358190938, now seen corresponding path program 7 times [2022-07-12 18:24:03,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:03,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932365389] [2022-07-12 18:24:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:03,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:03,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:03,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932365389] [2022-07-12 18:24:03,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932365389] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:03,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977049491] [2022-07-12 18:24:03,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:24:03,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:03,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:03,724 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:03,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 18:24:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:03,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-12 18:24:03,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:03,958 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 [2022-07-12 18:24:04,079 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 [2022-07-12 18:24:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:04,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:04,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:24:04,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:24:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:04,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977049491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:04,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:04,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 32 [2022-07-12 18:24:04,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776993812] [2022-07-12 18:24:04,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:04,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 18:24:04,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:04,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 18:24:04,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2022-07-12 18:24:04,303 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:04,890 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2022-07-12 18:24:04,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 18:24:04,890 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-12 18:24:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:04,891 INFO L225 Difference]: With dead ends: 73 [2022-07-12 18:24:04,891 INFO L226 Difference]: Without dead ends: 54 [2022-07-12 18:24:04,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 18:24:04,892 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 70 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:04,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 264 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:24:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-12 18:24:04,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-07-12 18:24:04,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:04,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-07-12 18:24:04,896 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2022-07-12 18:24:04,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:04,896 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-07-12 18:24:04,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:04,897 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-07-12 18:24:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 18:24:04,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:04,898 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:04,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:05,111 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,SelfDestructingSolverStorable16 [2022-07-12 18:24:05,112 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:05,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:05,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1602484457, now seen corresponding path program 8 times [2022-07-12 18:24:05,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:05,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910412860] [2022-07-12 18:24:05,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:05,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:05,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:05,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910412860] [2022-07-12 18:24:05,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910412860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:05,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128552981] [2022-07-12 18:24:05,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:24:05,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:05,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:05,381 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:05,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 18:24:05,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:24:05,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:05,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-12 18:24:05,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 45 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:05,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:06,033 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 [2022-07-12 18:24:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 45 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:06,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128552981] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:06,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:06,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2022-07-12 18:24:06,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492522608] [2022-07-12 18:24:06,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:06,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 18:24:06,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:06,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 18:24:06,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 18:24:06,086 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 36 states, 35 states have (on average 2.914285714285714) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:06,489 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-07-12 18:24:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:24:06,490 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.914285714285714) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-07-12 18:24:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:06,490 INFO L225 Difference]: With dead ends: 56 [2022-07-12 18:24:06,490 INFO L226 Difference]: Without dead ends: 56 [2022-07-12 18:24:06,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 18:24:06,491 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 102 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:06,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 211 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:24:06,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-12 18:24:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-07-12 18:24:06,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:06,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-07-12 18:24:06,498 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2022-07-12 18:24:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:06,501 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-07-12 18:24:06,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.914285714285714) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-07-12 18:24:06,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 18:24:06,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:06,503 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:06,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:06,711 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,SelfDestructingSolverStorable17 [2022-07-12 18:24:06,712 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:06,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1052944635, now seen corresponding path program 9 times [2022-07-12 18:24:06,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:06,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653044186] [2022-07-12 18:24:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:06,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:07,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:07,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653044186] [2022-07-12 18:24:07,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653044186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:07,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057444305] [2022-07-12 18:24:07,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:24:07,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:07,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:07,026 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:07,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 18:24:07,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-12 18:24:07,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:07,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-12 18:24:07,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:07,323 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 [2022-07-12 18:24:07,455 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 [2022-07-12 18:24:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:07,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:07,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:24:07,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:24:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:07,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057444305] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:07,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:07,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 35 [2022-07-12 18:24:07,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93706338] [2022-07-12 18:24:07,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:07,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 18:24:07,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:07,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 18:24:07,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:24:07,742 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:08,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:08,463 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2022-07-12 18:24:08,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 18:24:08,463 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-12 18:24:08,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:08,464 INFO L225 Difference]: With dead ends: 83 [2022-07-12 18:24:08,464 INFO L226 Difference]: Without dead ends: 61 [2022-07-12 18:24:08,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=2281, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 18:24:08,465 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 116 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:08,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 313 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:24:08,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-12 18:24:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-07-12 18:24:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 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) [2022-07-12 18:24:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-07-12 18:24:08,467 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2022-07-12 18:24:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:08,468 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-07-12 18:24:08,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-07-12 18:24:08,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-12 18:24:08,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:08,469 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:08,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:08,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:08,679 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:08,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:08,680 INFO L85 PathProgramCache]: Analyzing trace with hash -409414312, now seen corresponding path program 10 times [2022-07-12 18:24:08,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:08,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383247314] [2022-07-12 18:24:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:08,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 45 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:08,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:08,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383247314] [2022-07-12 18:24:08,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383247314] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:08,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789524764] [2022-07-12 18:24:08,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:24:08,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:08,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:08,914 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:08,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 18:24:08,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:24:08,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:08,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-12 18:24:08,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:08,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:24:09,285 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 [2022-07-12 18:24:09,682 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:24:09,683 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 19 treesize of output 19 [2022-07-12 18:24:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 72 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:09,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:10,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:24:10,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:24:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 91 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:11,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789524764] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:11,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:11,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 57 [2022-07-12 18:24:11,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549018005] [2022-07-12 18:24:11,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:11,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-12 18:24:11,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:11,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-12 18:24:11,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=2948, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 18:24:11,335 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 58 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 58 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) [2022-07-12 18:24:12,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:12,432 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2022-07-12 18:24:12,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 18:24:12,432 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 58 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 57 [2022-07-12 18:24:12,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:12,433 INFO L225 Difference]: With dead ends: 66 [2022-07-12 18:24:12,433 INFO L226 Difference]: Without dead ends: 66 [2022-07-12 18:24:12,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=950, Invalid=4600, Unknown=0, NotChecked=0, Total=5550 [2022-07-12 18:24:12,434 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 253 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:12,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 383 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 995 Invalid, 0 Unknown, 22 Unchecked, 0.5s Time] [2022-07-12 18:24:12,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-12 18:24:12,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-07-12 18:24:12,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-07-12 18:24:12,441 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 57 [2022-07-12 18:24:12,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:12,441 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-07-12 18:24:12,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 58 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) [2022-07-12 18:24:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-07-12 18:24:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 18:24:12,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:12,442 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:12,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:12,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:12,655 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:12,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:12,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1923200216, now seen corresponding path program 11 times [2022-07-12 18:24:12,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:12,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088044932] [2022-07-12 18:24:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:12,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 95 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:12,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:12,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088044932] [2022-07-12 18:24:12,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088044932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:12,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923153916] [2022-07-12 18:24:12,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:24:12,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:12,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:12,904 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:12,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 18:24:12,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-12 18:24:12,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:12,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-12 18:24:12,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:12,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:24:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 117 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:13,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 117 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:13,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923153916] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:13,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:13,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 49 [2022-07-12 18:24:13,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788977094] [2022-07-12 18:24:13,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:13,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 18:24:13,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:13,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 18:24:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 18:24:13,934 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 49 states, 49 states have (on average 3.163265306122449) internal successors, (155), 49 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) [2022-07-12 18:24:14,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:14,233 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2022-07-12 18:24:14,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:24:14,234 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.163265306122449) internal successors, (155), 49 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 63 [2022-07-12 18:24:14,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:14,234 INFO L225 Difference]: With dead ends: 98 [2022-07-12 18:24:14,234 INFO L226 Difference]: Without dead ends: 71 [2022-07-12 18:24:14,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=732, Invalid=2690, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 18:24:14,236 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:14,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 151 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:24:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-12 18:24:14,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2022-07-12 18:24:14,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 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) [2022-07-12 18:24:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-07-12 18:24:14,238 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2022-07-12 18:24:14,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:14,238 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-07-12 18:24:14,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.163265306122449) internal successors, (155), 49 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) [2022-07-12 18:24:14,238 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-07-12 18:24:14,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 18:24:14,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:14,239 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:14,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-12 18:24:14,443 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,SelfDestructingSolverStorable20 [2022-07-12 18:24:14,443 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:14,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:14,444 INFO L85 PathProgramCache]: Analyzing trace with hash -305803019, now seen corresponding path program 12 times [2022-07-12 18:24:14,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:14,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541825930] [2022-07-12 18:24:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:14,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 17 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:14,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:14,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541825930] [2022-07-12 18:24:14,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541825930] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:14,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873733833] [2022-07-12 18:24:14,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:24:14,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:14,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:14,760 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:14,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 18:24:14,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-12 18:24:14,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:14,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-12 18:24:14,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:15,122 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 [2022-07-12 18:24:15,255 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 [2022-07-12 18:24:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 17 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:15,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:15,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:24:15,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:24:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 17 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:15,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873733833] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:15,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:15,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2022-07-12 18:24:15,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678909622] [2022-07-12 18:24:15,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:15,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 18:24:15,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:15,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 18:24:15,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 18:24:15,569 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 41 states, 41 states have (on average 2.8292682926829267) internal successors, (116), 41 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:16,503 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2022-07-12 18:24:16,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 18:24:16,505 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8292682926829267) internal successors, (116), 41 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-12 18:24:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:16,505 INFO L225 Difference]: With dead ends: 103 [2022-07-12 18:24:16,505 INFO L226 Difference]: Without dead ends: 75 [2022-07-12 18:24:16,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 110 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=285, Invalid=3375, Unknown=0, NotChecked=0, Total=3660 [2022-07-12 18:24:16,506 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 139 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:16,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 560 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1304 Invalid, 0 Unknown, 50 Unchecked, 0.5s Time] [2022-07-12 18:24:16,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-12 18:24:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-07-12 18:24:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:16,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-07-12 18:24:16,508 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2022-07-12 18:24:16,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:16,508 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-07-12 18:24:16,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8292682926829267) internal successors, (116), 41 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:16,508 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-07-12 18:24:16,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-12 18:24:16,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:16,509 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:16,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:16,709 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,SelfDestructingSolverStorable21 [2022-07-12 18:24:16,709 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:16,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1022060910, now seen corresponding path program 13 times [2022-07-12 18:24:16,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:16,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660636203] [2022-07-12 18:24:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:16,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 91 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:16,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:16,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660636203] [2022-07-12 18:24:16,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660636203] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:16,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351094016] [2022-07-12 18:24:16,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:24:16,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:16,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:16,994 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:16,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 18:24:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:17,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-12 18:24:17,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 120 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:17,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:17,770 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 [2022-07-12 18:24:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 120 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:17,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351094016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:17,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:17,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 46 [2022-07-12 18:24:17,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707052704] [2022-07-12 18:24:17,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:17,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 18:24:17,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:17,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 18:24:17,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 18:24:17,822 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 47 states, 46 states have (on average 3.130434782608696) internal successors, (144), 47 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:18,613 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2022-07-12 18:24:18,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 18:24:18,613 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.130434782608696) internal successors, (144), 47 states have internal predecessors, (144), 0 states have call successors, (0), 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 [2022-07-12 18:24:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:18,613 INFO L225 Difference]: With dead ends: 77 [2022-07-12 18:24:18,613 INFO L226 Difference]: Without dead ends: 77 [2022-07-12 18:24:18,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=818, Invalid=3604, Unknown=0, NotChecked=0, Total=4422 [2022-07-12 18:24:18,615 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 290 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:18,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 372 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:24:18,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-12 18:24:18,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-07-12 18:24:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 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) [2022-07-12 18:24:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-07-12 18:24:18,617 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2022-07-12 18:24:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:18,617 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-07-12 18:24:18,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.130434782608696) internal successors, (144), 47 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-07-12 18:24:18,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 18:24:18,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:18,618 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:18,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:18,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:18,831 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:18,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:18,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1193427278, now seen corresponding path program 14 times [2022-07-12 18:24:18,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:18,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289956867] [2022-07-12 18:24:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:18,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 19 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:19,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:19,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289956867] [2022-07-12 18:24:19,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289956867] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:19,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402274682] [2022-07-12 18:24:19,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:24:19,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:19,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:19,246 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:24:19,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 18:24:19,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:24:19,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:19,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-12 18:24:19,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:19,543 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 [2022-07-12 18:24:20,314 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:24:20,314 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 18 [2022-07-12 18:24:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 120 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:20,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:21,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:24:21,269 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 [2022-07-12 18:24:21,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:24:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 120 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:21,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402274682] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:21,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:21,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 66 [2022-07-12 18:24:21,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669796191] [2022-07-12 18:24:21,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:21,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 18:24:21,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:21,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 18:24:21,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3965, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 18:24:21,329 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 66 states, 66 states have (on average 2.696969696969697) internal successors, (178), 66 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:22,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:22,458 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2022-07-12 18:24:22,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-12 18:24:22,458 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.696969696969697) internal successors, (178), 66 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-07-12 18:24:22,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:22,458 INFO L225 Difference]: With dead ends: 118 [2022-07-12 18:24:22,459 INFO L226 Difference]: Without dead ends: 87 [2022-07-12 18:24:22,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=551, Invalid=6255, Unknown=0, NotChecked=0, Total=6806 [2022-07-12 18:24:22,460 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:22,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 789 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1150 Invalid, 0 Unknown, 209 Unchecked, 0.4s Time] [2022-07-12 18:24:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-12 18:24:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2022-07-12 18:24:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-07-12 18:24:22,462 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 74 [2022-07-12 18:24:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:22,463 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-07-12 18:24:22,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.696969696969697) internal successors, (178), 66 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:22,463 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-07-12 18:24:22,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-12 18:24:22,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:22,464 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:22,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:22,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:22,680 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:22,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:22,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1850755055, now seen corresponding path program 15 times [2022-07-12 18:24:22,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:22,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838775541] [2022-07-12 18:24:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:22,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 21 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:23,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:23,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838775541] [2022-07-12 18:24:23,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838775541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:23,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834854301] [2022-07-12 18:24:23,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:24:23,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:23,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:23,104 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) [2022-07-12 18:24:23,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 18:24:23,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-12 18:24:23,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:23,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-12 18:24:23,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:23,552 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 [2022-07-12 18:24:23,735 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 [2022-07-12 18:24:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 21 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:23,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:23,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:24:23,850 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 26 treesize of output 22 [2022-07-12 18:24:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 21 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:24,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834854301] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:24,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:24,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2022-07-12 18:24:24,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201929036] [2022-07-12 18:24:24,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:24,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 18:24:24,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 18:24:24,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2036, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 18:24:24,073 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 47 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:25,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:25,383 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2022-07-12 18:24:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 18:24:25,383 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 47 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-12 18:24:25,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:25,384 INFO L225 Difference]: With dead ends: 123 [2022-07-12 18:24:25,384 INFO L226 Difference]: Without dead ends: 89 [2022-07-12 18:24:25,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=373, Invalid=4597, Unknown=0, NotChecked=0, Total=4970 [2022-07-12 18:24:25,385 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 172 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1801 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:25,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 740 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1801 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 18:24:25,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-12 18:24:25,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2022-07-12 18:24:25,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:25,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-07-12 18:24:25,387 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2022-07-12 18:24:25,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:25,387 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-07-12 18:24:25,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 47 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:25,387 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-07-12 18:24:25,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-12 18:24:25,387 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:25,387 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:25,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:25,588 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,SelfDestructingSolverStorable24 [2022-07-12 18:24:25,588 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:25,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:25,589 INFO L85 PathProgramCache]: Analyzing trace with hash -680364340, now seen corresponding path program 16 times [2022-07-12 18:24:25,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:25,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282079545] [2022-07-12 18:24:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:25,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 153 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:25,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:25,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282079545] [2022-07-12 18:24:25,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282079545] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:25,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313403368] [2022-07-12 18:24:25,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:24:25,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:25,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:25,992 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) [2022-07-12 18:24:25,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 18:24:26,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:24:26,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:26,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-12 18:24:26,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:26,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:24:26,558 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 [2022-07-12 18:24:27,177 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:24:27,178 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 19 treesize of output 19 [2022-07-12 18:24:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 200 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:27,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:28,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:24:28,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:24:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 231 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:29,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313403368] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:29,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:29,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 81 [2022-07-12 18:24:29,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828121712] [2022-07-12 18:24:29,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:29,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-12 18:24:29,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:29,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-12 18:24:29,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=5954, Unknown=0, NotChecked=0, Total=6642 [2022-07-12 18:24:29,585 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 82 states, 81 states have (on average 3.074074074074074) internal successors, (249), 82 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:31,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:31,146 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2022-07-12 18:24:31,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 18:24:31,146 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.074074074074074) internal successors, (249), 82 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-07-12 18:24:31,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:31,147 INFO L225 Difference]: With dead ends: 94 [2022-07-12 18:24:31,147 INFO L226 Difference]: Without dead ends: 94 [2022-07-12 18:24:31,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1680, Invalid=8826, Unknown=0, NotChecked=0, Total=10506 [2022-07-12 18:24:31,148 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 414 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:31,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 604 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1536 Invalid, 0 Unknown, 27 Unchecked, 0.6s Time] [2022-07-12 18:24:31,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-12 18:24:31,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-07-12 18:24:31,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 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) [2022-07-12 18:24:31,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-07-12 18:24:31,150 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 85 [2022-07-12 18:24:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:31,150 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-07-12 18:24:31,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.074074074074074) internal successors, (249), 82 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:31,151 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-07-12 18:24:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 18:24:31,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:31,160 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:31,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:31,360 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,SelfDestructingSolverStorable25 [2022-07-12 18:24:31,360 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:31,361 INFO L85 PathProgramCache]: Analyzing trace with hash 525430604, now seen corresponding path program 17 times [2022-07-12 18:24:31,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:31,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413082534] [2022-07-12 18:24:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:31,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 213 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:31,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:31,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413082534] [2022-07-12 18:24:31,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413082534] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:31,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361761637] [2022-07-12 18:24:31,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:24:31,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:31,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:31,730 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) [2022-07-12 18:24:31,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 18:24:31,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-12 18:24:31,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:31,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-12 18:24:31,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:31,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:24:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 247 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:32,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 247 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:33,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361761637] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:33,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:33,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 68 [2022-07-12 18:24:33,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164193959] [2022-07-12 18:24:33,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:33,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-12 18:24:33,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:33,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-12 18:24:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=3769, Unknown=0, NotChecked=0, Total=4556 [2022-07-12 18:24:33,405 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:34,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:34,230 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2022-07-12 18:24:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 18:24:34,230 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-12 18:24:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:34,231 INFO L225 Difference]: With dead ends: 138 [2022-07-12 18:24:34,231 INFO L226 Difference]: Without dead ends: 99 [2022-07-12 18:24:34,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1615, Invalid=6941, Unknown=0, NotChecked=0, Total=8556 [2022-07-12 18:24:34,232 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 112 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:34,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 191 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:24:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-12 18:24:34,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2022-07-12 18:24:34,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-07-12 18:24:34,234 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 91 [2022-07-12 18:24:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:34,234 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-07-12 18:24:34,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-07-12 18:24:34,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-12 18:24:34,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:34,235 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:34,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:34,447 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,SelfDestructingSolverStorable26 [2022-07-12 18:24:34,447 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:34,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:34,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1484755479, now seen corresponding path program 18 times [2022-07-12 18:24:34,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:34,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386220641] [2022-07-12 18:24:34,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:34,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 25 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:34,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:34,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386220641] [2022-07-12 18:24:34,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386220641] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:34,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253301588] [2022-07-12 18:24:34,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:24:34,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:34,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:34,988 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) [2022-07-12 18:24:34,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 18:24:35,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-12 18:24:35,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:35,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-12 18:24:35,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:35,672 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 [2022-07-12 18:24:35,860 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 [2022-07-12 18:24:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 25 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:35,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:35,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:24:35,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:24:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 25 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:36,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253301588] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:36,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:36,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 53 [2022-07-12 18:24:36,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407069771] [2022-07-12 18:24:36,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:36,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-12 18:24:36,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:36,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-12 18:24:36,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2616, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 18:24:36,290 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 53 states, 53 states have (on average 3.018867924528302) internal successors, (160), 53 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:37,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:37,808 INFO L93 Difference]: Finished difference Result 143 states and 144 transitions. [2022-07-12 18:24:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-12 18:24:37,809 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.018867924528302) internal successors, (160), 53 states have internal predecessors, (160), 0 states have call successors, (0), 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 95 [2022-07-12 18:24:37,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:37,809 INFO L225 Difference]: With dead ends: 143 [2022-07-12 18:24:37,809 INFO L226 Difference]: Without dead ends: 103 [2022-07-12 18:24:37,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 160 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=373, Invalid=6107, Unknown=0, NotChecked=0, Total=6480 [2022-07-12 18:24:37,810 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 187 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 2251 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 2393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:37,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 949 Invalid, 2393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2251 Invalid, 0 Unknown, 66 Unchecked, 0.7s Time] [2022-07-12 18:24:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-12 18:24:37,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2022-07-12 18:24:37,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 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) [2022-07-12 18:24:37,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-07-12 18:24:37,812 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2022-07-12 18:24:37,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:37,812 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-07-12 18:24:37,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.018867924528302) internal successors, (160), 53 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:37,812 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-07-12 18:24:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-12 18:24:37,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:37,813 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:37,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:38,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:38,018 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:38,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:38,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1822742022, now seen corresponding path program 19 times [2022-07-12 18:24:38,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:38,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690451889] [2022-07-12 18:24:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:38,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 231 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:38,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:38,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690451889] [2022-07-12 18:24:38,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690451889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:38,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363247503] [2022-07-12 18:24:38,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:24:38,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:38,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:38,478 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) [2022-07-12 18:24:38,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 18:24:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:38,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-12 18:24:38,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 276 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:39,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:39,840 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 [2022-07-12 18:24:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 276 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:39,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363247503] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:39,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:39,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31, 31] total 62 [2022-07-12 18:24:39,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227533590] [2022-07-12 18:24:39,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:39,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-12 18:24:39,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:39,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-12 18:24:39,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=3508, Unknown=0, NotChecked=0, Total=3906 [2022-07-12 18:24:39,926 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 63 states, 62 states have (on average 3.225806451612903) internal successors, (200), 63 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) [2022-07-12 18:24:41,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:41,264 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2022-07-12 18:24:41,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 18:24:41,264 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.225806451612903) internal successors, (200), 63 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 99 [2022-07-12 18:24:41,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:41,265 INFO L225 Difference]: With dead ends: 105 [2022-07-12 18:24:41,265 INFO L226 Difference]: Without dead ends: 105 [2022-07-12 18:24:41,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1496, Invalid=6694, Unknown=0, NotChecked=0, Total=8190 [2022-07-12 18:24:41,266 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 244 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:41,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 657 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 18:24:41,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-12 18:24:41,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2022-07-12 18:24:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 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) [2022-07-12 18:24:41,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-07-12 18:24:41,275 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 99 [2022-07-12 18:24:41,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:41,275 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-07-12 18:24:41,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.225806451612903) internal successors, (200), 63 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) [2022-07-12 18:24:41,275 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-07-12 18:24:41,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-12 18:24:41,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:41,275 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:41,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-12 18:24:41,476 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,SelfDestructingSolverStorable28 [2022-07-12 18:24:41,476 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:41,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:41,476 INFO L85 PathProgramCache]: Analyzing trace with hash 36035262, now seen corresponding path program 20 times [2022-07-12 18:24:41,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:41,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108626453] [2022-07-12 18:24:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:41,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 27 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:42,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:42,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108626453] [2022-07-12 18:24:42,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108626453] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:42,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710744020] [2022-07-12 18:24:42,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:24:42,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:42,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:42,046 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) [2022-07-12 18:24:42,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 18:24:42,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:24:42,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:42,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-12 18:24:42,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:42,578 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 [2022-07-12 18:24:43,791 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:24:43,791 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 18 [2022-07-12 18:24:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 276 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:43,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:45,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:24:45,260 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 16 treesize of output 12 [2022-07-12 18:24:45,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:24:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 276 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:45,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710744020] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:45,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:45,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 86 [2022-07-12 18:24:45,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774972357] [2022-07-12 18:24:45,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:45,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-12 18:24:45,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:45,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-12 18:24:45,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=6791, Unknown=0, NotChecked=0, Total=7310 [2022-07-12 18:24:45,336 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 86 states, 86 states have (on average 2.86046511627907) internal successors, (246), 86 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:47,184 INFO L93 Difference]: Finished difference Result 158 states and 159 transitions. [2022-07-12 18:24:47,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-12 18:24:47,185 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.86046511627907) internal successors, (246), 86 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-07-12 18:24:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:47,189 INFO L225 Difference]: With dead ends: 158 [2022-07-12 18:24:47,189 INFO L226 Difference]: Without dead ends: 115 [2022-07-12 18:24:47,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1907 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=847, Invalid=10495, Unknown=0, NotChecked=0, Total=11342 [2022-07-12 18:24:47,193 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 110 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:47,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1374 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2028 Invalid, 0 Unknown, 272 Unchecked, 0.7s Time] [2022-07-12 18:24:47,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-12 18:24:47,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2022-07-12 18:24:47,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 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) [2022-07-12 18:24:47,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-07-12 18:24:47,196 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 102 [2022-07-12 18:24:47,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:47,196 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-07-12 18:24:47,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.86046511627907) internal successors, (246), 86 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-07-12 18:24:47,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-12 18:24:47,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:47,197 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:47,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:47,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:47,399 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:47,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:47,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1641325283, now seen corresponding path program 21 times [2022-07-12 18:24:47,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:47,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097333436] [2022-07-12 18:24:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:47,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 29 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:48,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:48,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097333436] [2022-07-12 18:24:48,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097333436] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:48,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811157820] [2022-07-12 18:24:48,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:24:48,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:48,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:48,066 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) [2022-07-12 18:24:48,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 18:24:48,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-12 18:24:48,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 108 conjunts are in the unsatisfiable core [2022-07-12 18:24:48,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:48,886 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 [2022-07-12 18:24:49,064 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 [2022-07-12 18:24:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 29 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:49,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:49,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:24:49,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:24:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 29 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:49,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811157820] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:49,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:49,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 59 [2022-07-12 18:24:49,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221755519] [2022-07-12 18:24:49,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:49,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-12 18:24:49,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:49,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-12 18:24:49,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 18:24:49,593 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 59 states, 59 states have (on average 3.0847457627118646) internal successors, (182), 59 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) [2022-07-12 18:24:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:51,646 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2022-07-12 18:24:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-12 18:24:51,646 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.0847457627118646) internal successors, (182), 59 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 109 [2022-07-12 18:24:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:51,647 INFO L225 Difference]: With dead ends: 163 [2022-07-12 18:24:51,647 INFO L226 Difference]: Without dead ends: 117 [2022-07-12 18:24:51,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 184 SyntacticMatches, 11 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=477, Invalid=7713, Unknown=0, NotChecked=0, Total=8190 [2022-07-12 18:24:51,648 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 201 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 3149 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 3236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:51,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1279 Invalid, 3236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3149 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 18:24:51,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-12 18:24:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2022-07-12 18:24:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 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) [2022-07-12 18:24:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-07-12 18:24:51,650 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 109 [2022-07-12 18:24:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:51,651 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-07-12 18:24:51,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.0847457627118646) internal successors, (182), 59 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) [2022-07-12 18:24:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-07-12 18:24:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-12 18:24:51,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:51,652 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:51,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:51,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:51,875 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1459743680, now seen corresponding path program 22 times [2022-07-12 18:24:51,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:51,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094987837] [2022-07-12 18:24:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:51,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:24:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 325 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:52,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:24:52,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094987837] [2022-07-12 18:24:52,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094987837] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:24:52,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147929712] [2022-07-12 18:24:52,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:24:52,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:52,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:24:52,462 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) [2022-07-12 18:24:52,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 18:24:52,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:24:52,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:24:52,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 103 conjunts are in the unsatisfiable core [2022-07-12 18:24:52,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:24:52,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:24:52,855 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 16 treesize of output 12 [2022-07-12 18:24:53,696 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:24:53,696 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 19 treesize of output 19 [2022-07-12 18:24:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 392 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:53,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:24:55,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:24:55,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:24:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 435 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:24:57,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147929712] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:24:57,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:24:57,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 37, 37] total 92 [2022-07-12 18:24:57,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471808682] [2022-07-12 18:24:57,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:24:57,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-07-12 18:24:57,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:24:57,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-07-12 18:24:57,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=7627, Unknown=0, NotChecked=0, Total=8556 [2022-07-12 18:24:57,127 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 93 states, 92 states have (on average 3.0543478260869565) internal successors, (281), 93 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:59,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:24:59,401 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2022-07-12 18:24:59,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-12 18:24:59,401 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 3.0543478260869565) internal successors, (281), 93 states have internal predecessors, (281), 0 states have call successors, (0), 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 113 [2022-07-12 18:24:59,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:24:59,402 INFO L225 Difference]: With dead ends: 122 [2022-07-12 18:24:59,402 INFO L226 Difference]: Without dead ends: 122 [2022-07-12 18:24:59,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2175, Invalid=11397, Unknown=0, NotChecked=0, Total=13572 [2022-07-12 18:24:59,403 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 311 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 2287 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 2478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:24:59,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 901 Invalid, 2478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2287 Invalid, 0 Unknown, 46 Unchecked, 0.9s Time] [2022-07-12 18:24:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-12 18:24:59,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-07-12 18:24:59,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-07-12 18:24:59,405 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 113 [2022-07-12 18:24:59,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:24:59,405 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-07-12 18:24:59,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 3.0543478260869565) internal successors, (281), 93 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:24:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-07-12 18:24:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-12 18:24:59,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:24:59,406 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:24:59,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-12 18:24:59,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:24:59,619 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:24:59,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:24:59,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2025445952, now seen corresponding path program 23 times [2022-07-12 18:24:59,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:24:59,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812209341] [2022-07-12 18:24:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:24:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:24:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 379 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:00,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:00,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812209341] [2022-07-12 18:25:00,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812209341] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:00,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528198943] [2022-07-12 18:25:00,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:25:00,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:00,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:00,182 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) [2022-07-12 18:25:00,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 18:25:00,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-07-12 18:25:00,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:25:00,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-12 18:25:00,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:00,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:25:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 425 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:01,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 425 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:02,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528198943] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:02,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:02,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 89 [2022-07-12 18:25:02,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036924643] [2022-07-12 18:25:02,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:02,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-12 18:25:02,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:02,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-12 18:25:02,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1440, Invalid=6392, Unknown=0, NotChecked=0, Total=7832 [2022-07-12 18:25:02,752 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 89 states, 89 states have (on average 3.359550561797753) internal successors, (299), 89 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:03,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:03,419 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2022-07-12 18:25:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-12 18:25:03,420 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.359550561797753) internal successors, (299), 89 states have internal predecessors, (299), 0 states have call successors, (0), 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 119 [2022-07-12 18:25:03,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:03,420 INFO L225 Difference]: With dead ends: 178 [2022-07-12 18:25:03,420 INFO L226 Difference]: Without dead ends: 127 [2022-07-12 18:25:03,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2316, Invalid=9026, Unknown=0, NotChecked=0, Total=11342 [2022-07-12 18:25:03,422 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 124 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:03,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 219 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:25:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-12 18:25:03,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2022-07-12 18:25:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 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) [2022-07-12 18:25:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-07-12 18:25:03,424 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2022-07-12 18:25:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:03,424 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-07-12 18:25:03,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.359550561797753) internal successors, (299), 89 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:03,425 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-07-12 18:25:03,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-12 18:25:03,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:03,425 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:03,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 18:25:03,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:03,641 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:25:03,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:03,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1188346147, now seen corresponding path program 24 times [2022-07-12 18:25:03,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:03,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930055871] [2022-07-12 18:25:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:03,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 33 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:04,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:04,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930055871] [2022-07-12 18:25:04,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930055871] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:04,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418335900] [2022-07-12 18:25:04,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:25:04,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:04,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:04,439 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) [2022-07-12 18:25:04,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 18:25:05,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-12 18:25:05,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:25:05,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-12 18:25:05,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:05,786 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 [2022-07-12 18:25:05,991 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 [2022-07-12 18:25:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 33 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:05,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:06,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:25:06,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:25:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 33 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:06,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418335900] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:06,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:06,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 65 [2022-07-12 18:25:06,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263258390] [2022-07-12 18:25:06,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:06,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-12 18:25:06,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:06,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-12 18:25:06,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3992, Unknown=0, NotChecked=0, Total=4160 [2022-07-12 18:25:06,594 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 65 states, 65 states have (on average 3.1384615384615384) internal successors, (204), 65 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:09,170 INFO L93 Difference]: Finished difference Result 183 states and 184 transitions. [2022-07-12 18:25:09,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-12 18:25:09,170 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.1384615384615384) internal successors, (204), 65 states have internal predecessors, (204), 0 states have call successors, (0), 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 123 [2022-07-12 18:25:09,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:09,171 INFO L225 Difference]: With dead ends: 183 [2022-07-12 18:25:09,171 INFO L226 Difference]: Without dead ends: 131 [2022-07-12 18:25:09,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 210 SyntacticMatches, 11 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=461, Invalid=9639, Unknown=0, NotChecked=0, Total=10100 [2022-07-12 18:25:09,172 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 159 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 4042 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 4184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:09,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1674 Invalid, 4184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4042 Invalid, 0 Unknown, 75 Unchecked, 1.3s Time] [2022-07-12 18:25:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-12 18:25:09,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2022-07-12 18:25:09,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 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) [2022-07-12 18:25:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2022-07-12 18:25:09,175 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 123 [2022-07-12 18:25:09,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:09,175 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2022-07-12 18:25:09,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.1384615384615384) internal successors, (204), 65 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:09,176 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2022-07-12 18:25:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-12 18:25:09,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:09,176 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:09,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-12 18:25:09,391 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,SelfDestructingSolverStorable33 [2022-07-12 18:25:09,391 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:25:09,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:09,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1127256442, now seen corresponding path program 25 times [2022-07-12 18:25:09,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:09,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403274328] [2022-07-12 18:25:09,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:09,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 435 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:10,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:10,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403274328] [2022-07-12 18:25:10,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403274328] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:10,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089846187] [2022-07-12 18:25:10,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:25:10,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:10,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:10,102 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) [2022-07-12 18:25:10,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 18:25:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:10,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-12 18:25:10,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 496 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:10,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:11,869 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 [2022-07-12 18:25:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 496 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:11,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089846187] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:11,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:11,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 39, 39] total 78 [2022-07-12 18:25:11,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889813968] [2022-07-12 18:25:11,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:11,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-07-12 18:25:11,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:11,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-07-12 18:25:11,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=5550, Unknown=0, NotChecked=0, Total=6162 [2022-07-12 18:25:11,965 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 79 states, 78 states have (on average 3.282051282051282) internal successors, (256), 79 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:13,964 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2022-07-12 18:25:13,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 18:25:13,964 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 3.282051282051282) internal successors, (256), 79 states have internal predecessors, (256), 0 states have call successors, (0), 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 127 [2022-07-12 18:25:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:13,965 INFO L225 Difference]: With dead ends: 133 [2022-07-12 18:25:13,965 INFO L226 Difference]: Without dead ends: 133 [2022-07-12 18:25:13,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2084 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2382, Invalid=10728, Unknown=0, NotChecked=0, Total=13110 [2022-07-12 18:25:13,966 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 552 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 2531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:13,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 918 Invalid, 2531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 2291 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 18:25:13,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-12 18:25:13,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2022-07-12 18:25:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:13,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2022-07-12 18:25:13,968 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 127 [2022-07-12 18:25:13,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:13,968 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2022-07-12 18:25:13,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 3.282051282051282) internal successors, (256), 79 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:13,969 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2022-07-12 18:25:13,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-12 18:25:13,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:13,969 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:13,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-12 18:25:14,176 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,SelfDestructingSolverStorable34 [2022-07-12 18:25:14,176 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:25:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash -252642614, now seen corresponding path program 26 times [2022-07-12 18:25:14,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:14,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049993500] [2022-07-12 18:25:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:14,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 35 proven. 1003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:15,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:15,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049993500] [2022-07-12 18:25:15,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049993500] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:15,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792022048] [2022-07-12 18:25:15,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:25:15,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:15,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:15,003 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) [2022-07-12 18:25:15,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 18:25:15,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:25:15,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:25:15,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 111 conjunts are in the unsatisfiable core [2022-07-12 18:25:15,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:15,752 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 [2022-07-12 18:25:17,437 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:25:17,437 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 18 [2022-07-12 18:25:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 496 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:17,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:19,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:25:19,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:25:19,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-07-12 18:25:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 496 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:19,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792022048] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:19,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:19,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 106 [2022-07-12 18:25:19,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727456450] [2022-07-12 18:25:19,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:19,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-07-12 18:25:19,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:19,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-07-12 18:25:19,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=10369, Unknown=0, NotChecked=0, Total=11130 [2022-07-12 18:25:19,592 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 106 states, 106 states have (on average 2.9622641509433962) internal successors, (314), 106 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:22,275 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2022-07-12 18:25:22,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-12 18:25:22,276 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.9622641509433962) internal successors, (314), 106 states have internal predecessors, (314), 0 states have call successors, (0), 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 130 [2022-07-12 18:25:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:22,277 INFO L225 Difference]: With dead ends: 198 [2022-07-12 18:25:22,277 INFO L226 Difference]: Without dead ends: 143 [2022-07-12 18:25:22,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 227 SyntacticMatches, 3 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2905 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1207, Invalid=15823, Unknown=0, NotChecked=0, Total=17030 [2022-07-12 18:25:22,278 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 134 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 2974 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:22,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1893 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2974 Invalid, 0 Unknown, 208 Unchecked, 1.1s Time] [2022-07-12 18:25:22,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-12 18:25:22,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 138. [2022-07-12 18:25:22,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-07-12 18:25:22,280 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 130 [2022-07-12 18:25:22,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:22,281 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-07-12 18:25:22,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.9622641509433962) internal successors, (314), 106 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-07-12 18:25:22,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-12 18:25:22,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:22,282 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:22,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-12 18:25:22,491 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,SelfDestructingSolverStorable35 [2022-07-12 18:25:22,491 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:25:22,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:22,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1899841065, now seen corresponding path program 27 times [2022-07-12 18:25:22,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:22,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64833211] [2022-07-12 18:25:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:22,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 37 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:23,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:23,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64833211] [2022-07-12 18:25:23,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64833211] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:23,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090573943] [2022-07-12 18:25:23,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:25:23,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:23,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:23,385 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) [2022-07-12 18:25:23,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 18:25:24,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-07-12 18:25:24,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:25:24,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 132 conjunts are in the unsatisfiable core [2022-07-12 18:25:24,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:25,101 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 [2022-07-12 18:25:25,321 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 [2022-07-12 18:25:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 37 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:25,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:25,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:25:25,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:25:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 37 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:26,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090573943] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:26,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:26,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 71 [2022-07-12 18:25:26,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052368719] [2022-07-12 18:25:26,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:26,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-12 18:25:26,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:26,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-12 18:25:26,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=4788, Unknown=0, NotChecked=0, Total=4970 [2022-07-12 18:25:26,083 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 71 states, 71 states have (on average 3.183098591549296) internal successors, (226), 71 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:29,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:29,051 INFO L93 Difference]: Finished difference Result 203 states and 204 transitions. [2022-07-12 18:25:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-12 18:25:29,052 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.183098591549296) internal successors, (226), 71 states have internal predecessors, (226), 0 states have call successors, (0), 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 137 [2022-07-12 18:25:29,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:29,052 INFO L225 Difference]: With dead ends: 203 [2022-07-12 18:25:29,053 INFO L226 Difference]: Without dead ends: 145 [2022-07-12 18:25:29,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 234 SyntacticMatches, 13 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=581, Invalid=11629, Unknown=0, NotChecked=0, Total=12210 [2022-07-12 18:25:29,054 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 254 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 4473 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 4648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 4473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:29,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 1834 Invalid, 4648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 4473 Invalid, 0 Unknown, 63 Unchecked, 1.5s Time] [2022-07-12 18:25:29,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-12 18:25:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2022-07-12 18:25:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2022-07-12 18:25:29,056 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2022-07-12 18:25:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:29,056 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2022-07-12 18:25:29,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.183098591549296) internal successors, (226), 71 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2022-07-12 18:25:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-12 18:25:29,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:29,057 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:29,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-12 18:25:29,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:29,286 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:25:29,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:29,286 INFO L85 PathProgramCache]: Analyzing trace with hash 877571508, now seen corresponding path program 28 times [2022-07-12 18:25:29,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:29,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566151707] [2022-07-12 18:25:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:29,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 561 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:30,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:30,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566151707] [2022-07-12 18:25:30,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566151707] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:30,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965953926] [2022-07-12 18:25:30,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:25:30,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:30,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:30,095 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) [2022-07-12 18:25:30,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 18:25:30,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:25:30,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:25:30,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 123 conjunts are in the unsatisfiable core [2022-07-12 18:25:30,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:30,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:25:30,568 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 [2022-07-12 18:25:31,764 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:25:31,764 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 19 treesize of output 19 [2022-07-12 18:25:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 648 proven. 587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:31,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:33,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:25:33,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:25:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 703 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:36,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965953926] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:36,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:36,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 45, 45] total 112 [2022-07-12 18:25:36,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827452915] [2022-07-12 18:25:36,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:36,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-07-12 18:25:36,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:36,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-07-12 18:25:36,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2022-07-12 18:25:36,394 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 113 states, 112 states have (on average 3.1160714285714284) internal successors, (349), 113 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:39,310 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2022-07-12 18:25:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-12 18:25:39,311 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 3.1160714285714284) internal successors, (349), 113 states have internal predecessors, (349), 0 states have call successors, (0), 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 141 [2022-07-12 18:25:39,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:39,312 INFO L225 Difference]: With dead ends: 150 [2022-07-12 18:25:39,312 INFO L226 Difference]: Without dead ends: 150 [2022-07-12 18:25:39,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3225 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3041, Invalid=16699, Unknown=0, NotChecked=0, Total=19740 [2022-07-12 18:25:39,313 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 404 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 3200 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 3416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 3200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:39,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 1293 Invalid, 3416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 3200 Invalid, 0 Unknown, 50 Unchecked, 1.3s Time] [2022-07-12 18:25:39,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-12 18:25:39,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2022-07-12 18:25:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:39,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-07-12 18:25:39,316 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 141 [2022-07-12 18:25:39,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:39,316 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-07-12 18:25:39,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 3.1160714285714284) internal successors, (349), 113 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:39,317 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-07-12 18:25:39,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-12 18:25:39,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:39,318 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:39,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-12 18:25:39,519 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,SelfDestructingSolverStorable37 [2022-07-12 18:25:39,520 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:25:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:39,520 INFO L85 PathProgramCache]: Analyzing trace with hash -397223884, now seen corresponding path program 29 times [2022-07-12 18:25:39,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:39,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557094362] [2022-07-12 18:25:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:39,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 593 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:40,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:40,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557094362] [2022-07-12 18:25:40,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557094362] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:40,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919551843] [2022-07-12 18:25:40,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:25:40,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:40,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:40,280 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) [2022-07-12 18:25:40,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-12 18:25:40,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-07-12 18:25:40,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:25:40,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-12 18:25:40,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:40,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:25:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 651 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:42,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 651 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:43,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919551843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:43,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:43,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 108 [2022-07-12 18:25:43,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402130951] [2022-07-12 18:25:43,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:43,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-07-12 18:25:43,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:43,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-07-12 18:25:43,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=9617, Unknown=0, NotChecked=0, Total=11556 [2022-07-12 18:25:43,940 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 108 states, 108 states have (on average 3.435185185185185) internal successors, (371), 108 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:45,607 INFO L93 Difference]: Finished difference Result 218 states and 219 transitions. [2022-07-12 18:25:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 18:25:45,608 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.435185185185185) internal successors, (371), 108 states have internal predecessors, (371), 0 states have call successors, (0), 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 147 [2022-07-12 18:25:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:45,608 INFO L225 Difference]: With dead ends: 218 [2022-07-12 18:25:45,608 INFO L226 Difference]: Without dead ends: 155 [2022-07-12 18:25:45,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5796 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4027, Invalid=18025, Unknown=0, NotChecked=0, Total=22052 [2022-07-12 18:25:45,610 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 159 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:45,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 339 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:25:45,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-12 18:25:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2022-07-12 18:25:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2022-07-12 18:25:45,612 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 147 [2022-07-12 18:25:45,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:45,612 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2022-07-12 18:25:45,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.435185185185185) internal successors, (371), 108 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2022-07-12 18:25:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-12 18:25:45,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:45,613 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:45,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-12 18:25:45,823 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,SelfDestructingSolverStorable38 [2022-07-12 18:25:45,824 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:25:45,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:45,825 INFO L85 PathProgramCache]: Analyzing trace with hash -80127023, now seen corresponding path program 30 times [2022-07-12 18:25:45,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:45,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571544413] [2022-07-12 18:25:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:45,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 41 proven. 1390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:46,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:46,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571544413] [2022-07-12 18:25:46,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571544413] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:46,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784938112] [2022-07-12 18:25:46,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:25:46,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:46,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:46,894 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) [2022-07-12 18:25:46,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-12 18:25:48,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-07-12 18:25:48,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:25:48,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 144 conjunts are in the unsatisfiable core [2022-07-12 18:25:48,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:49,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:25:49,408 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 [2022-07-12 18:25:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 41 proven. 1390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:49,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:49,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:25:49,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:25:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 41 proven. 1390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:50,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784938112] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:50,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:50,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 77 [2022-07-12 18:25:50,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541028790] [2022-07-12 18:25:50,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:50,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-12 18:25:50,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:50,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-12 18:25:50,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=5656, Unknown=0, NotChecked=0, Total=5852 [2022-07-12 18:25:50,328 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:53,893 INFO L93 Difference]: Finished difference Result 223 states and 224 transitions. [2022-07-12 18:25:53,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-12 18:25:53,894 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 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 151 [2022-07-12 18:25:53,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:53,895 INFO L225 Difference]: With dead ends: 223 [2022-07-12 18:25:53,895 INFO L226 Difference]: Without dead ends: 159 [2022-07-12 18:25:53,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 256 SyntacticMatches, 17 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=633, Invalid=13887, Unknown=0, NotChecked=0, Total=14520 [2022-07-12 18:25:53,897 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 221 mSDsluCounter, 2245 mSDsCounter, 0 mSdLazyCounter, 5622 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 2290 SdHoareTripleChecker+Invalid, 5791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 5622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:53,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 2290 Invalid, 5791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 5622 Invalid, 0 Unknown, 67 Unchecked, 1.8s Time] [2022-07-12 18:25:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-12 18:25:53,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2022-07-12 18:25:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2022-07-12 18:25:53,899 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 151 [2022-07-12 18:25:53,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:53,899 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2022-07-12 18:25:53,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:53,900 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2022-07-12 18:25:53,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-12 18:25:53,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:53,901 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:53,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-12 18:25:54,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-12 18:25:54,122 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:25:54,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:54,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1774897390, now seen corresponding path program 31 times [2022-07-12 18:25:54,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:54,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332190525] [2022-07-12 18:25:54,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:54,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 703 proven. 809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:55,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:25:55,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332190525] [2022-07-12 18:25:55,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332190525] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:25:55,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567045251] [2022-07-12 18:25:55,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:25:55,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:55,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:25:55,060 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) [2022-07-12 18:25:55,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-12 18:25:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:25:55,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-12 18:25:55,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:25:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 780 proven. 732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:56,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:25:57,109 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 [2022-07-12 18:25:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 780 proven. 732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:25:57,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567045251] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:25:57,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:25:57,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 95 [2022-07-12 18:25:57,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62765940] [2022-07-12 18:25:57,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:25:57,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-07-12 18:25:57,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:25:57,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-07-12 18:25:57,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=8010, Unknown=0, NotChecked=0, Total=9120 [2022-07-12 18:25:57,220 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 96 states, 95 states have (on average 3.2842105263157895) internal successors, (312), 96 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) [2022-07-12 18:25:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:25:59,127 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2022-07-12 18:25:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-12 18:25:59,128 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 3.2842105263157895) internal successors, (312), 96 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) Word has length 155 [2022-07-12 18:25:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:25:59,128 INFO L225 Difference]: With dead ends: 161 [2022-07-12 18:25:59,129 INFO L226 Difference]: Without dead ends: 161 [2022-07-12 18:25:59,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3807 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2586, Invalid=11694, Unknown=0, NotChecked=0, Total=14280 [2022-07-12 18:25:59,130 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 502 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 3540 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 3754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 3540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:25:59,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 1406 Invalid, 3754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 3540 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-12 18:25:59,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-12 18:25:59,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-07-12 18:25:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:25:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-07-12 18:25:59,135 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 155 [2022-07-12 18:25:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:25:59,136 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-07-12 18:25:59,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 3.2842105263157895) internal successors, (312), 96 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) [2022-07-12 18:25:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-07-12 18:25:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-12 18:25:59,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:25:59,137 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:25:59,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-12 18:25:59,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:25:59,345 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:25:59,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:25:59,345 INFO L85 PathProgramCache]: Analyzing trace with hash 625745622, now seen corresponding path program 32 times [2022-07-12 18:25:59,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:25:59,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51858214] [2022-07-12 18:25:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:25:59,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:25:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:26:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 43 proven. 1533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:00,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:26:00,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51858214] [2022-07-12 18:26:00,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51858214] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:26:00,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789002593] [2022-07-12 18:26:00,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:26:00,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:26:00,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:26:00,439 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) [2022-07-12 18:26:00,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-12 18:26:00,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:26:00,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:26:00,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 131 conjunts are in the unsatisfiable core [2022-07-12 18:26:00,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:26:01,456 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 [2022-07-12 18:26:03,717 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:26:03,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-12 18:26:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 780 proven. 796 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:03,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:26:06,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:26:06,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:26:06,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-07-12 18:26:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 780 proven. 796 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:06,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789002593] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:26:06,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:26:06,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 126 [2022-07-12 18:26:06,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107324801] [2022-07-12 18:26:06,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:26:06,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-07-12 18:26:06,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:26:06,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-07-12 18:26:06,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1051, Invalid=14699, Unknown=0, NotChecked=0, Total=15750 [2022-07-12 18:26:06,626 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 126 states, 126 states have (on average 3.0317460317460316) internal successors, (382), 126 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:10,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:26:10,238 INFO L93 Difference]: Finished difference Result 238 states and 239 transitions. [2022-07-12 18:26:10,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-12 18:26:10,238 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 3.0317460317460316) internal successors, (382), 126 states have internal predecessors, (382), 0 states have call successors, (0), 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 158 [2022-07-12 18:26:10,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:26:10,239 INFO L225 Difference]: With dead ends: 238 [2022-07-12 18:26:10,239 INFO L226 Difference]: Without dead ends: 171 [2022-07-12 18:26:10,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4111 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1631, Invalid=22239, Unknown=0, NotChecked=0, Total=23870 [2022-07-12 18:26:10,240 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 159 mSDsluCounter, 2622 mSDsCounter, 0 mSdLazyCounter, 3965 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 4346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:26:10,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 2670 Invalid, 4346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3965 Invalid, 0 Unknown, 353 Unchecked, 1.4s Time] [2022-07-12 18:26:10,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-12 18:26:10,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 166. [2022-07-12 18:26:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 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) [2022-07-12 18:26:10,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2022-07-12 18:26:10,243 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 158 [2022-07-12 18:26:10,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:26:10,243 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2022-07-12 18:26:10,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 3.0317460317460316) internal successors, (382), 126 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:10,243 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2022-07-12 18:26:10,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-07-12 18:26:10,244 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:26:10,244 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:26:10,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-12 18:26:10,459 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,SelfDestructingSolverStorable41 [2022-07-12 18:26:10,459 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:26:10,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:26:10,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1064465205, now seen corresponding path program 33 times [2022-07-12 18:26:10,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:26:10,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315992066] [2022-07-12 18:26:10,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:26:10,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:26:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:26:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 45 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:11,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:26:11,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315992066] [2022-07-12 18:26:11,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315992066] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:26:11,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789704976] [2022-07-12 18:26:11,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:26:11,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:26:11,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:26:11,820 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) [2022-07-12 18:26:11,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-12 18:26:13,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-07-12 18:26:13,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:26:13,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 154 conjunts are in the unsatisfiable core [2022-07-12 18:26:13,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:26:15,155 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 [2022-07-12 18:26:15,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:26:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 45 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:15,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:26:15,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:26:15,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:26:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 45 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:16,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789704976] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:26:16,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:26:16,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 83 [2022-07-12 18:26:16,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506577167] [2022-07-12 18:26:16,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:26:16,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-12 18:26:16,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:26:16,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-12 18:26:16,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6596, Unknown=0, NotChecked=0, Total=6806 [2022-07-12 18:26:16,466 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 83 states, 83 states have (on average 3.253012048192771) internal successors, (270), 83 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:26:20,929 INFO L93 Difference]: Finished difference Result 243 states and 244 transitions. [2022-07-12 18:26:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-12 18:26:20,930 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.253012048192771) internal successors, (270), 83 states have internal predecessors, (270), 0 states have call successors, (0), 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 165 [2022-07-12 18:26:20,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:26:20,930 INFO L225 Difference]: With dead ends: 243 [2022-07-12 18:26:20,930 INFO L226 Difference]: Without dead ends: 173 [2022-07-12 18:26:20,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 284 SyntacticMatches, 15 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=685, Invalid=16345, Unknown=0, NotChecked=0, Total=17030 [2022-07-12 18:26:20,932 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 250 mSDsluCounter, 2867 mSDsCounter, 0 mSdLazyCounter, 7187 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 2916 SdHoareTripleChecker+Invalid, 7375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 7187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:26:20,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 2916 Invalid, 7375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 7187 Invalid, 0 Unknown, 75 Unchecked, 2.4s Time] [2022-07-12 18:26:20,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-12 18:26:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2022-07-12 18:26:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.0118343195266273) internal successors, (171), 169 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2022-07-12 18:26:20,934 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 165 [2022-07-12 18:26:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:26:20,934 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2022-07-12 18:26:20,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.253012048192771) internal successors, (270), 83 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:20,934 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2022-07-12 18:26:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-12 18:26:20,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:26:20,936 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:26:20,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-12 18:26:21,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:26:21,151 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:26:21,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:26:21,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2004304680, now seen corresponding path program 34 times [2022-07-12 18:26:21,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:26:21,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946628414] [2022-07-12 18:26:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:26:21,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:26:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:26:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 861 proven. 956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:22,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:26:22,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946628414] [2022-07-12 18:26:22,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946628414] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:26:22,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605065540] [2022-07-12 18:26:22,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:26:22,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:26:22,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:26:22,144 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) [2022-07-12 18:26:22,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-12 18:26:22,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:26:22,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:26:22,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 143 conjunts are in the unsatisfiable core [2022-07-12 18:26:22,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:26:22,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:26:23,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-12 18:26:25,653 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:26:25,653 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 19 treesize of output 19 [2022-07-12 18:26:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 968 proven. 849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:25,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:26:28,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:26:28,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:26:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 1035 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:32,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605065540] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:26:32,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:26:32,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 53, 53] total 153 [2022-07-12 18:26:32,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651796868] [2022-07-12 18:26:32,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:26:32,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-07-12 18:26:32,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:26:32,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-07-12 18:26:32,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=21212, Unknown=0, NotChecked=0, Total=23562 [2022-07-12 18:26:32,347 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand has 154 states, 153 states have (on average 3.2745098039215685) internal successors, (501), 154 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:26:36,668 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2022-07-12 18:26:36,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-12 18:26:36,668 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 153 states have (on average 3.2745098039215685) internal successors, (501), 154 states have internal predecessors, (501), 0 states have call successors, (0), 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 169 [2022-07-12 18:26:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:26:36,671 INFO L225 Difference]: With dead ends: 178 [2022-07-12 18:26:36,672 INFO L226 Difference]: Without dead ends: 178 [2022-07-12 18:26:36,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6275 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=5334, Invalid=29448, Unknown=0, NotChecked=0, Total=34782 [2022-07-12 18:26:36,673 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 651 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 5011 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 5404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 5011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:26:36,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1987 Invalid, 5404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 5011 Invalid, 0 Unknown, 70 Unchecked, 2.0s Time] [2022-07-12 18:26:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-12 18:26:36,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2022-07-12 18:26:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2022-07-12 18:26:36,675 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 169 [2022-07-12 18:26:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:26:36,676 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2022-07-12 18:26:36,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 153 states have (on average 3.2745098039215685) internal successors, (501), 154 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2022-07-12 18:26:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-12 18:26:36,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:26:36,677 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:26:36,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-07-12 18:26:36,883 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,SelfDestructingSolverStorable43 [2022-07-12 18:26:36,883 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:26:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:26:36,884 INFO L85 PathProgramCache]: Analyzing trace with hash 642418344, now seen corresponding path program 35 times [2022-07-12 18:26:36,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:26:36,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190684377] [2022-07-12 18:26:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:26:36,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:26:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:26:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1960 backedges. 855 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:37,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:26:37,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190684377] [2022-07-12 18:26:37,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190684377] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:26:37,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582313786] [2022-07-12 18:26:37,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:26:37,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:26:37,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:26:37,853 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) [2022-07-12 18:26:37,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-12 18:26:38,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-07-12 18:26:38,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:26:38,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 113 conjunts are in the unsatisfiable core [2022-07-12 18:26:38,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:26:38,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:26:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1960 backedges. 925 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:40,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:26:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1960 backedges. 925 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:42,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582313786] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:26:42,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:26:42,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 128 [2022-07-12 18:26:42,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428224481] [2022-07-12 18:26:42,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:26:42,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-07-12 18:26:42,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:26:42,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-07-12 18:26:42,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2707, Invalid=13549, Unknown=0, NotChecked=0, Total=16256 [2022-07-12 18:26:42,877 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 128 states, 128 states have (on average 3.4609375) internal successors, (443), 128 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:45,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:26:45,123 INFO L93 Difference]: Finished difference Result 258 states and 259 transitions. [2022-07-12 18:26:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-12 18:26:45,123 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.4609375) internal successors, (443), 128 states have internal predecessors, (443), 0 states have call successors, (0), 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 175 [2022-07-12 18:26:45,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:26:45,124 INFO L225 Difference]: With dead ends: 258 [2022-07-12 18:26:45,124 INFO L226 Difference]: Without dead ends: 183 [2022-07-12 18:26:45,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8300 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5641, Invalid=25511, Unknown=0, NotChecked=0, Total=31152 [2022-07-12 18:26:45,125 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 174 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:26:45,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 453 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:26:45,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-12 18:26:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2022-07-12 18:26:45,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 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) [2022-07-12 18:26:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2022-07-12 18:26:45,128 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 175 [2022-07-12 18:26:45,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:26:45,128 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2022-07-12 18:26:45,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.4609375) internal successors, (443), 128 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2022-07-12 18:26:45,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-12 18:26:45,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:26:45,129 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:26:45,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-12 18:26:45,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:26:45,343 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:26:45,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:26:45,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1138905915, now seen corresponding path program 36 times [2022-07-12 18:26:45,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:26:45,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898100293] [2022-07-12 18:26:45,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:26:45,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:26:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:26:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2053 backedges. 49 proven. 2004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:46,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:26:46,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898100293] [2022-07-12 18:26:46,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898100293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:26:46,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990978851] [2022-07-12 18:26:46,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:26:46,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:26:46,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:26:46,755 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) [2022-07-12 18:26:46,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-12 18:26:50,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-07-12 18:26:50,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:26:50,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 168 conjunts are in the unsatisfiable core [2022-07-12 18:26:50,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:26:51,862 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 [2022-07-12 18:26:52,140 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 [2022-07-12 18:26:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2053 backedges. 49 proven. 2004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:52,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:26:52,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:26:52,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:26:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2053 backedges. 49 proven. 2004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:53,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990978851] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:26:53,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:26:53,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 89 [2022-07-12 18:26:53,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211063174] [2022-07-12 18:26:53,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:26:53,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-12 18:26:53,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:26:53,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-12 18:26:53,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=7608, Unknown=0, NotChecked=0, Total=7832 [2022-07-12 18:26:53,004 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 89 states, 89 states have (on average 3.2808988764044944) internal successors, (292), 89 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:58,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:26:58,148 INFO L93 Difference]: Finished difference Result 263 states and 264 transitions. [2022-07-12 18:26:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-12 18:26:58,149 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.2808988764044944) internal successors, (292), 89 states have internal predecessors, (292), 0 states have call successors, (0), 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 179 [2022-07-12 18:26:58,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:26:58,149 INFO L225 Difference]: With dead ends: 263 [2022-07-12 18:26:58,150 INFO L226 Difference]: Without dead ends: 187 [2022-07-12 18:26:58,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 313 SyntacticMatches, 12 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=637, Invalid=19103, Unknown=0, NotChecked=0, Total=19740 [2022-07-12 18:26:58,151 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 217 mSDsluCounter, 3515 mSDsCounter, 0 mSdLazyCounter, 8595 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 8936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 8595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:26:58,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 3568 Invalid, 8936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 8595 Invalid, 0 Unknown, 243 Unchecked, 2.8s Time] [2022-07-12 18:26:58,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-12 18:26:58,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2022-07-12 18:26:58,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2022-07-12 18:26:58,153 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 179 [2022-07-12 18:26:58,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:26:58,153 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2022-07-12 18:26:58,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.2808988764044944) internal successors, (292), 89 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:26:58,154 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2022-07-12 18:26:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-12 18:26:58,154 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:26:58,154 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:26:58,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-12 18:26:58,371 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,SelfDestructingSolverStorable45 [2022-07-12 18:26:58,371 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:26:58,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:26:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1233550434, now seen corresponding path program 37 times [2022-07-12 18:26:58,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:26:58,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579230459] [2022-07-12 18:26:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:26:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:26:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:26:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 1035 proven. 1115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:26:59,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:26:59,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579230459] [2022-07-12 18:26:59,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579230459] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:26:59,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281103120] [2022-07-12 18:26:59,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:26:59,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:26:59,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:26:59,615 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) [2022-07-12 18:26:59,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-12 18:26:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:26:59,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 140 conjunts are in the unsatisfiable core [2022-07-12 18:26:59,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 1128 proven. 1022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:01,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:02,832 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 [2022-07-12 18:27:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 1128 proven. 1022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:02,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281103120] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:02,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:02,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 55, 55] total 110 [2022-07-12 18:27:02,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437594256] [2022-07-12 18:27:02,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:02,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-07-12 18:27:02,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:02,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-07-12 18:27:02,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1184, Invalid=11026, Unknown=0, NotChecked=0, Total=12210 [2022-07-12 18:27:02,979 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 111 states, 110 states have (on average 3.3454545454545452) internal successors, (368), 111 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:06,759 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2022-07-12 18:27:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-12 18:27:06,759 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 3.3454545454545452) internal successors, (368), 111 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2022-07-12 18:27:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:06,760 INFO L225 Difference]: With dead ends: 189 [2022-07-12 18:27:06,760 INFO L226 Difference]: Without dead ends: 189 [2022-07-12 18:27:06,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 306 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4260 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4778, Invalid=21628, Unknown=0, NotChecked=0, Total=26406 [2022-07-12 18:27:06,761 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 639 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 4656 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 4950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 4656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:06,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 1847 Invalid, 4950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 4656 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-12 18:27:06,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-12 18:27:06,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2022-07-12 18:27:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:06,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2022-07-12 18:27:06,763 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 183 [2022-07-12 18:27:06,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:06,763 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2022-07-12 18:27:06,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 3.3454545454545452) internal successors, (368), 111 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2022-07-12 18:27:06,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-07-12 18:27:06,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:06,764 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:06,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:06,964 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,SelfDestructingSolverStorable46 [2022-07-12 18:27:06,964 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:27:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:06,965 INFO L85 PathProgramCache]: Analyzing trace with hash 960775906, now seen corresponding path program 38 times [2022-07-12 18:27:06,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:06,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989495756] [2022-07-12 18:27:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:06,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 51 proven. 2175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:08,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:08,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989495756] [2022-07-12 18:27:08,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989495756] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:08,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93568979] [2022-07-12 18:27:08,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:27:08,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:08,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:08,459 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) [2022-07-12 18:27:08,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-12 18:27:08,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:27:08,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:08,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 151 conjunts are in the unsatisfiable core [2022-07-12 18:27:08,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:09,973 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 [2022-07-12 18:27:13,020 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:27:13,020 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 18 [2022-07-12 18:27:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 1128 proven. 1098 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:13,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:16,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:27:16,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:27:16,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-07-12 18:27:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 1128 proven. 1098 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:16,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93568979] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:16,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:16,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 146 [2022-07-12 18:27:16,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794012524] [2022-07-12 18:27:16,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:16,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-07-12 18:27:16,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:16,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-07-12 18:27:16,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1389, Invalid=19781, Unknown=0, NotChecked=0, Total=21170 [2022-07-12 18:27:16,806 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 146 states, 146 states have (on average 3.0821917808219177) internal successors, (450), 146 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:24,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:24,388 INFO L93 Difference]: Finished difference Result 278 states and 279 transitions. [2022-07-12 18:27:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-12 18:27:24,389 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 3.0821917808219177) internal successors, (450), 146 states have internal predecessors, (450), 0 states have call successors, (0), 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 186 [2022-07-12 18:27:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:24,389 INFO L225 Difference]: With dead ends: 278 [2022-07-12 18:27:24,390 INFO L226 Difference]: Without dead ends: 199 [2022-07-12 18:27:24,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 331 SyntacticMatches, 3 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5525 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=2119, Invalid=29743, Unknown=0, NotChecked=0, Total=31862 [2022-07-12 18:27:24,401 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 176 mSDsluCounter, 3329 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 5694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:24,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 3385 Invalid, 5694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 5354 Invalid, 0 Unknown, 310 Unchecked, 1.9s Time] [2022-07-12 18:27:24,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-12 18:27:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 194. [2022-07-12 18:27:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.0103626943005182) internal successors, (195), 193 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) [2022-07-12 18:27:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2022-07-12 18:27:24,403 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 186 [2022-07-12 18:27:24,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:24,403 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2022-07-12 18:27:24,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 3.0821917808219177) internal successors, (450), 146 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:24,404 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2022-07-12 18:27:24,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-12 18:27:24,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:24,404 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:24,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:24,620 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,SelfDestructingSolverStorable47 [2022-07-12 18:27:24,620 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:27:24,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:24,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1487412159, now seen corresponding path program 39 times [2022-07-12 18:27:24,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:24,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456758577] [2022-07-12 18:27:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:24,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 53 proven. 2353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:26,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:26,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456758577] [2022-07-12 18:27:26,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456758577] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:26,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185621333] [2022-07-12 18:27:26,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:27:26,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:26,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:26,263 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) [2022-07-12 18:27:26,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-12 18:27:28,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-07-12 18:27:28,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:28,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 180 conjunts are in the unsatisfiable core [2022-07-12 18:27:28,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:29,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-12 18:27:29,778 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 [2022-07-12 18:27:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 53 proven. 2353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:29,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:27:29,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-12 18:27:29,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-12 18:27:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 53 proven. 2353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:30,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185621333] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:27:30,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:27:30,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 95 [2022-07-12 18:27:30,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590295723] [2022-07-12 18:27:30,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:27:30,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-12 18:27:30,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:27:30,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-12 18:27:30,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=8692, Unknown=0, NotChecked=0, Total=8930 [2022-07-12 18:27:30,812 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand has 95 states, 95 states have (on average 3.305263157894737) internal successors, (314), 95 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:36,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:27:36,725 INFO L93 Difference]: Finished difference Result 283 states and 284 transitions. [2022-07-12 18:27:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-12 18:27:36,725 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.305263157894737) internal successors, (314), 95 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2022-07-12 18:27:36,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:27:36,726 INFO L225 Difference]: With dead ends: 283 [2022-07-12 18:27:36,726 INFO L226 Difference]: Without dead ends: 201 [2022-07-12 18:27:36,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 337 SyntacticMatches, 14 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2749 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=789, Invalid=21861, Unknown=0, NotChecked=0, Total=22650 [2022-07-12 18:27:36,728 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 340 mSDsluCounter, 4014 mSDsCounter, 0 mSdLazyCounter, 10093 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 4071 SdHoareTripleChecker+Invalid, 10252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 10093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:27:36,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 4071 Invalid, 10252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 10093 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-12 18:27:36,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-12 18:27:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2022-07-12 18:27:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 197 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2022-07-12 18:27:36,737 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 193 [2022-07-12 18:27:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:27:36,737 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2022-07-12 18:27:36,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.305263157894737) internal successors, (314), 95 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:27:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2022-07-12 18:27:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-12 18:27:36,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:27:36,738 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:27:36,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-12 18:27:36,955 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,SelfDestructingSolverStorable48 [2022-07-12 18:27:36,955 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-07-12 18:27:36,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:27:36,956 INFO L85 PathProgramCache]: Analyzing trace with hash -695544676, now seen corresponding path program 40 times [2022-07-12 18:27:36,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:27:36,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561576619] [2022-07-12 18:27:36,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:27:36,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:27:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:27:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 1225 proven. 1286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:27:38,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:27:38,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561576619] [2022-07-12 18:27:38,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561576619] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:27:38,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740503725] [2022-07-12 18:27:38,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:27:38,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:27:38,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:27:38,276 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) [2022-07-12 18:27:38,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-12 18:27:38,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:27:38,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:27:38,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 163 conjunts are in the unsatisfiable core [2022-07-12 18:27:38,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:27:38,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:27:40,508 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12