./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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/strreplace-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:43:59,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:43:59,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:43:59,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:43:59,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:43:59,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:43:59,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:43:59,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:43:59,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:43:59,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:43:59,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:43:59,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:43:59,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:43:59,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:43:59,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:43:59,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:43:59,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:43:59,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:43:59,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:43:59,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:43:59,184 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:43:59,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:43:59,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:43:59,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:43:59,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:43:59,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:43:59,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:43:59,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:43:59,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:43:59,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:43:59,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:43:59,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:43:59,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:43:59,197 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:43:59,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:43:59,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:43:59,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:43:59,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:43:59,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:43:59,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:43:59,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:43:59,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:43:59,202 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 05:43:59,226 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:43:59,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:43:59,227 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:43:59,227 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:43:59,228 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:43:59,228 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:43:59,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:43:59,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:43:59,229 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:43:59,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:43:59,229 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:43:59,230 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:43:59,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:43:59,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:43:59,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:43:59,230 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:43:59,230 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:43:59,231 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 05:43:59,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:43:59,231 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:43:59,231 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:43:59,231 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:43:59,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:43:59,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:43:59,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:43:59,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:43:59,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:43:59,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:43:59,232 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 05:43:59,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 05:43:59,233 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc [2022-07-23 05:43:59,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:43:59,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:43:59,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:43:59,476 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:43:59,476 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:43:59,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2022-07-23 05:43:59,522 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55c0089a9/21fb7ab7e8534063b2946b0c4dd6b268/FLAG00eeb603c [2022-07-23 05:43:59,972 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:43:59,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2022-07-23 05:43:59,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55c0089a9/21fb7ab7e8534063b2946b0c4dd6b268/FLAG00eeb603c [2022-07-23 05:43:59,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55c0089a9/21fb7ab7e8534063b2946b0c4dd6b268 [2022-07-23 05:43:59,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:43:59,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:43:59,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:43:59,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:43:59,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:43:59,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:43:59" (1/1) ... [2022-07-23 05:43:59,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fd7395f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:43:59, skipping insertion in model container [2022-07-23 05:43:59,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:43:59" (1/1) ... [2022-07-23 05:44:00,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:44:00,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:44:00,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:44:00,277 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:44:00,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:44:00,331 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:44:00,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:00 WrapperNode [2022-07-23 05:44:00,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:44:00,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:44:00,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:44:00,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:44:00,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:00" (1/1) ... [2022-07-23 05:44:00,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:00" (1/1) ... [2022-07-23 05:44:00,375 INFO L137 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-07-23 05:44:00,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:44:00,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:44:00,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:44:00,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:44:00,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:00" (1/1) ... [2022-07-23 05:44:00,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:00" (1/1) ... [2022-07-23 05:44:00,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:00" (1/1) ... [2022-07-23 05:44:00,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:00" (1/1) ... [2022-07-23 05:44:00,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:00" (1/1) ... [2022-07-23 05:44:00,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:00" (1/1) ... [2022-07-23 05:44:00,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:00" (1/1) ... [2022-07-23 05:44:00,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:44:00,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:44:00,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:44:00,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:44:00,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:00" (1/1) ... [2022-07-23 05:44:00,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:44:00,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:00,482 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) [2022-07-23 05:44:00,503 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 [2022-07-23 05:44:00,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-23 05:44:00,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-23 05:44:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 05:44:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 05:44:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:44:00,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:44:00,617 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:44:00,618 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:44:00,786 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:44:00,790 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:44:00,795 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-23 05:44:00,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:44:00 BoogieIcfgContainer [2022-07-23 05:44:00,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:44:00,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:44:00,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:44:00,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:44:00,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:43:59" (1/3) ... [2022-07-23 05:44:00,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b612d5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:44:00, skipping insertion in model container [2022-07-23 05:44:00,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:44:00" (2/3) ... [2022-07-23 05:44:00,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b612d5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:44:00, skipping insertion in model container [2022-07-23 05:44:00,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:44:00" (3/3) ... [2022-07-23 05:44:00,805 INFO L111 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2022-07-23 05:44:00,815 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:44:00,815 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-07-23 05:44:00,858 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:44:00,863 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@52d8a32d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@65f9df74 [2022-07-23 05:44:00,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-07-23 05:44:00,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 05:44:00,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:00,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 05:44:00,873 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:00,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:00,879 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-07-23 05:44:00,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:00,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63147686] [2022-07-23 05:44:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:00,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:01,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:01,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63147686] [2022-07-23 05:44:01,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63147686] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:01,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:01,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:01,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107730993] [2022-07-23 05:44:01,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:01,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:01,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:01,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:01,085 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 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) [2022-07-23 05:44:01,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:01,145 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-07-23 05:44:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:01,149 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 [2022-07-23 05:44:01,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:01,155 INFO L225 Difference]: With dead ends: 58 [2022-07-23 05:44:01,155 INFO L226 Difference]: Without dead ends: 54 [2022-07-23 05:44:01,158 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 [2022-07-23 05:44:01,163 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 60 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 [2022-07-23 05:44:01,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 60 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:01,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-23 05:44:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2022-07-23 05:44:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-07-23 05:44:01,196 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2022-07-23 05:44:01,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:01,197 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-07-23 05:44:01,197 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) [2022-07-23 05:44:01,197 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-07-23 05:44:01,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 05:44:01,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:01,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 05:44:01,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 05:44:01,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:01,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:01,199 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2022-07-23 05:44:01,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:01,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333446018] [2022-07-23 05:44:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:01,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:01,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:01,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333446018] [2022-07-23 05:44:01,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333446018] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:01,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:01,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:44:01,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340638314] [2022-07-23 05:44:01,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:01,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:44:01,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:01,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:44:01,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:44:01,248 INFO L87 Difference]: Start difference. First operand 33 states and 36 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) [2022-07-23 05:44:01,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:01,278 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-07-23 05:44:01,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:44:01,279 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 [2022-07-23 05:44:01,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:01,279 INFO L225 Difference]: With dead ends: 31 [2022-07-23 05:44:01,280 INFO L226 Difference]: Without dead ends: 31 [2022-07-23 05:44:01,280 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 [2022-07-23 05:44:01,281 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:01,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:01,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-23 05:44:01,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-23 05:44:01,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-07-23 05:44:01,288 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2022-07-23 05:44:01,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:01,288 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-07-23 05:44:01,289 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) [2022-07-23 05:44:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-07-23 05:44:01,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 05:44:01,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:01,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 05:44:01,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 05:44:01,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:01,294 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2022-07-23 05:44:01,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:01,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385209772] [2022-07-23 05:44:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:01,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:01,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:01,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385209772] [2022-07-23 05:44:01,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385209772] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:01,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:01,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:44:01,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374236947] [2022-07-23 05:44:01,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:01,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:01,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:01,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:01,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:01,346 INFO L87 Difference]: Start difference. First operand 31 states and 34 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) [2022-07-23 05:44:01,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:01,366 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-07-23 05:44:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:01,367 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 [2022-07-23 05:44:01,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:01,367 INFO L225 Difference]: With dead ends: 30 [2022-07-23 05:44:01,368 INFO L226 Difference]: Without dead ends: 30 [2022-07-23 05:44:01,368 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 [2022-07-23 05:44:01,369 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:01,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 20 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:01,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-23 05:44:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-23 05:44:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.5) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-07-23 05:44:01,372 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 6 [2022-07-23 05:44:01,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:01,373 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-07-23 05:44:01,373 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) [2022-07-23 05:44:01,373 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-07-23 05:44:01,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 05:44:01,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:01,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 05:44:01,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 05:44:01,374 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:01,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:01,375 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-07-23 05:44:01,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:01,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92981616] [2022-07-23 05:44:01,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:01,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:01,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:01,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92981616] [2022-07-23 05:44:01,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92981616] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:01,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:01,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:44:01,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106580778] [2022-07-23 05:44:01,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:01,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:01,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:01,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:01,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:01,420 INFO L87 Difference]: Start difference. First operand 30 states and 33 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) [2022-07-23 05:44:01,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:01,492 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2022-07-23 05:44:01,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:01,492 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 [2022-07-23 05:44:01,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:01,493 INFO L225 Difference]: With dead ends: 53 [2022-07-23 05:44:01,494 INFO L226 Difference]: Without dead ends: 53 [2022-07-23 05:44:01,494 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 [2022-07-23 05:44:01,496 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 74 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:01,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 35 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:01,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-23 05:44:01,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2022-07-23 05:44:01,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:01,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-07-23 05:44:01,502 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-07-23 05:44:01,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:01,503 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-07-23 05:44:01,503 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) [2022-07-23 05:44:01,503 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-07-23 05:44:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:44:01,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:01,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:01,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-23 05:44:01,504 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:01,504 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2022-07-23 05:44:01,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:01,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892682417] [2022-07-23 05:44:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:01,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:01,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:01,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892682417] [2022-07-23 05:44:01,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892682417] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:01,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:01,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:44:01,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677154993] [2022-07-23 05:44:01,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:01,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:01,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:01,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:01,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:01,562 INFO L87 Difference]: Start difference. First operand 32 states and 36 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) [2022-07-23 05:44:01,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:01,619 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-07-23 05:44:01,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:01,625 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 [2022-07-23 05:44:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:01,626 INFO L225 Difference]: With dead ends: 29 [2022-07-23 05:44:01,630 INFO L226 Difference]: Without dead ends: 29 [2022-07-23 05:44:01,631 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 [2022-07-23 05:44:01,632 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:01,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 24 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:01,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-23 05:44:01,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-23 05:44:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-07-23 05:44:01,636 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2022-07-23 05:44:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:01,636 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-07-23 05:44:01,636 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) [2022-07-23 05:44:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-07-23 05:44:01,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:44:01,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:01,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:01,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-23 05:44:01,638 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:01,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:01,638 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2022-07-23 05:44:01,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:01,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734207727] [2022-07-23 05:44:01,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:01,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:01,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:01,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734207727] [2022-07-23 05:44:01,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734207727] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:01,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:01,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:44:01,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278486683] [2022-07-23 05:44:01,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:01,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:44:01,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:44:01,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:44:01,708 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:01,767 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-07-23 05:44:01,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:44:01,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-23 05:44:01,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:01,768 INFO L225 Difference]: With dead ends: 40 [2022-07-23 05:44:01,768 INFO L226 Difference]: Without dead ends: 40 [2022-07-23 05:44:01,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:44:01,769 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:01,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:01,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-23 05:44:01,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-07-23 05:44:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-07-23 05:44:01,772 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 8 [2022-07-23 05:44:01,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:01,773 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-07-23 05:44:01,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:01,773 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-07-23 05:44:01,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:44:01,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:01,773 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:01,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-23 05:44:01,774 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:01,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:01,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-07-23 05:44:01,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:01,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139851209] [2022-07-23 05:44:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:01,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:01,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:01,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139851209] [2022-07-23 05:44:01,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139851209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:01,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842012545] [2022-07-23 05:44:01,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:01,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:01,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:01,918 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) [2022-07-23 05:44:01,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 05:44:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:01,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 05:44:02,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:02,101 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 [2022-07-23 05:44:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:02,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:02,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842012545] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:02,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:02,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-23 05:44:02,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78840900] [2022-07-23 05:44:02,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:02,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:44:02,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:02,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:44:02,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:44:02,320 INFO L87 Difference]: Start difference. First operand 34 states and 40 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) [2022-07-23 05:44:02,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:02,470 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2022-07-23 05:44:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:44:02,472 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 [2022-07-23 05:44:02,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:02,473 INFO L225 Difference]: With dead ends: 78 [2022-07-23 05:44:02,473 INFO L226 Difference]: Without dead ends: 78 [2022-07-23 05:44:02,473 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 [2022-07-23 05:44:02,475 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 98 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:02,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 107 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-23 05:44:02,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 31. [2022-07-23 05:44:02,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-07-23 05:44:02,481 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 10 [2022-07-23 05:44:02,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:02,481 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-07-23 05:44:02,481 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) [2022-07-23 05:44:02,481 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-07-23 05:44:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 05:44:02,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:02,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:02,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:02,701 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 [2022-07-23 05:44:02,701 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:02,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:02,701 INFO L85 PathProgramCache]: Analyzing trace with hash -204531026, now seen corresponding path program 1 times [2022-07-23 05:44:02,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:02,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290671964] [2022-07-23 05:44:02,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:02,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:02,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:02,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290671964] [2022-07-23 05:44:02,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290671964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:02,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:02,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:44:02,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517137856] [2022-07-23 05:44:02,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:02,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:44:02,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:02,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:44:02,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:44:02,803 INFO L87 Difference]: Start difference. First operand 31 states and 36 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) [2022-07-23 05:44:02,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:02,832 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-07-23 05:44:02,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:44:02,834 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 [2022-07-23 05:44:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:02,836 INFO L225 Difference]: With dead ends: 30 [2022-07-23 05:44:02,836 INFO L226 Difference]: Without dead ends: 27 [2022-07-23 05:44:02,836 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 [2022-07-23 05:44:02,840 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:02,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:02,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-23 05:44:02,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-23 05:44:02,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 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) [2022-07-23 05:44:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-23 05:44:02,847 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 12 [2022-07-23 05:44:02,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:02,847 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-23 05:44:02,847 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) [2022-07-23 05:44:02,847 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-23 05:44:02,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 05:44:02,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:02,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:02,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-23 05:44:02,848 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:02,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:02,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2044161814, now seen corresponding path program 1 times [2022-07-23 05:44:02,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:02,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608062411] [2022-07-23 05:44:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:02,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:02,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:02,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608062411] [2022-07-23 05:44:02,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608062411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:02,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:02,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 05:44:02,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769690959] [2022-07-23 05:44:02,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:02,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:44:02,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:02,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:44:02,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:44:02,986 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:03,098 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-07-23 05:44:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:44:03,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-23 05:44:03,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:03,099 INFO L225 Difference]: With dead ends: 31 [2022-07-23 05:44:03,099 INFO L226 Difference]: Without dead ends: 25 [2022-07-23 05:44:03,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:44:03,100 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:03,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 90 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-23 05:44:03,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-23 05:44:03,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-07-23 05:44:03,103 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2022-07-23 05:44:03,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:03,103 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-07-23 05:44:03,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-07-23 05:44:03,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 05:44:03,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:03,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:03,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-23 05:44:03,107 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:03,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:03,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1343097236, now seen corresponding path program 1 times [2022-07-23 05:44:03,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:03,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671295056] [2022-07-23 05:44:03,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:03,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:03,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:03,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671295056] [2022-07-23 05:44:03,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671295056] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:44:03,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:44:03,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 05:44:03,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265460372] [2022-07-23 05:44:03,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:44:03,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:44:03,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:03,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:44:03,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:44:03,210 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:03,270 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-07-23 05:44:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:44:03,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-23 05:44:03,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:03,271 INFO L225 Difference]: With dead ends: 33 [2022-07-23 05:44:03,271 INFO L226 Difference]: Without dead ends: 29 [2022-07-23 05:44:03,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:44:03,272 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:03,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 72 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:44:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-23 05:44:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-07-23 05:44:03,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) 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) [2022-07-23 05:44:03,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-07-23 05:44:03,274 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2022-07-23 05:44:03,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:03,274 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-07-23 05:44:03,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-07-23 05:44:03,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:44:03,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:03,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:03,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-23 05:44:03,276 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:03,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:03,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1914076215, now seen corresponding path program 1 times [2022-07-23 05:44:03,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:03,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417376428] [2022-07-23 05:44:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:03,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:03,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:03,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417376428] [2022-07-23 05:44:03,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417376428] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:03,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386618675] [2022-07-23 05:44:03,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:03,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:03,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:03,360 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) [2022-07-23 05:44:03,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-23 05:44:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:03,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 05:44:03,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:03,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:03,565 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 5 treesize of output 3 [2022-07-23 05:44:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:03,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386618675] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:03,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:03,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-07-23 05:44:03,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192370662] [2022-07-23 05:44:03,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:03,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 05:44:03,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:03,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 05:44:03,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-07-23 05:44:03,585 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:03,703 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-07-23 05:44:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:44:03,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-23 05:44:03,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:03,704 INFO L225 Difference]: With dead ends: 36 [2022-07-23 05:44:03,704 INFO L226 Difference]: Without dead ends: 36 [2022-07-23 05:44:03,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-07-23 05:44:03,705 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 124 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:03,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 73 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:03,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-23 05:44:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-07-23 05:44:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-07-23 05:44:03,707 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2022-07-23 05:44:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:03,707 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-07-23 05:44:03,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-07-23 05:44:03,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 05:44:03,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:03,708 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:03,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:03,925 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 [2022-07-23 05:44:03,925 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:03,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:03,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1668744869, now seen corresponding path program 2 times [2022-07-23 05:44:03,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:03,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052285892] [2022-07-23 05:44:03,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:03,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:04,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:04,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052285892] [2022-07-23 05:44:04,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052285892] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:04,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602681388] [2022-07-23 05:44:04,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:44:04,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:04,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:04,028 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) [2022-07-23 05:44:04,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-23 05:44:04,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:44:04,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:04,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-23 05:44:04,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:04,105 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 [2022-07-23 05:44:04,277 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:44:04,277 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 [2022-07-23 05:44:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:04,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:04,596 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 [2022-07-23 05:44:04,600 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 [2022-07-23 05:44:04,605 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 [2022-07-23 05:44:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:04,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602681388] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:04,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:04,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-07-23 05:44:04,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101721110] [2022-07-23 05:44:04,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:04,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 05:44:04,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:04,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 05:44:04,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-07-23 05:44:04,623 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:04,872 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-07-23 05:44:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 05:44:04,873 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-23 05:44:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:04,873 INFO L225 Difference]: With dead ends: 52 [2022-07-23 05:44:04,873 INFO L226 Difference]: Without dead ends: 49 [2022-07-23 05:44:04,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2022-07-23 05:44:04,874 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:04,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 168 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-07-23 05:44:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-23 05:44:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-07-23 05:44:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:04,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-07-23 05:44:04,876 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 22 [2022-07-23 05:44:04,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:04,876 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-07-23 05:44:04,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:04,879 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-07-23 05:44:04,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 05:44:04,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:04,880 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:04,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:05,080 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 [2022-07-23 05:44:05,081 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:05,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:05,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1831987682, now seen corresponding path program 1 times [2022-07-23 05:44:05,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:05,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6767520] [2022-07-23 05:44:05,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:05,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:05,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:05,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6767520] [2022-07-23 05:44:05,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6767520] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:05,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353635902] [2022-07-23 05:44:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:05,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:05,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:05,256 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) [2022-07-23 05:44:05,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-23 05:44:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:05,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-23 05:44:05,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:05,369 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 [2022-07-23 05:44:05,448 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:44:05,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:44:05,488 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-23 05:44:05,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-23 05:44:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:05,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:05,546 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 [2022-07-23 05:44:05,548 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 [2022-07-23 05:44:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:05,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353635902] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:05,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:05,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-07-23 05:44:05,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910081347] [2022-07-23 05:44:05,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:05,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-23 05:44:05,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:05,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 05:44:05,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-07-23 05:44:05,614 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:05,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:05,804 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-07-23 05:44:05,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:44:05,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-23 05:44:05,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:05,805 INFO L225 Difference]: With dead ends: 50 [2022-07-23 05:44:05,805 INFO L226 Difference]: Without dead ends: 39 [2022-07-23 05:44:05,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-07-23 05:44:05,806 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:05,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 105 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-07-23 05:44:05,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-23 05:44:05,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2022-07-23 05:44:05,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-07-23 05:44:05,808 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2022-07-23 05:44:05,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:05,808 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-07-23 05:44:05,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:05,808 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-07-23 05:44:05,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 05:44:05,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:05,808 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:05,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:06,019 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 [2022-07-23 05:44:06,019 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:06,020 INFO L85 PathProgramCache]: Analyzing trace with hash -938115935, now seen corresponding path program 2 times [2022-07-23 05:44:06,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:06,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21526041] [2022-07-23 05:44:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:06,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:06,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:06,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21526041] [2022-07-23 05:44:06,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21526041] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:06,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957138424] [2022-07-23 05:44:06,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:44:06,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:06,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:06,116 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) [2022-07-23 05:44:06,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-23 05:44:06,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:44:06,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:06,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-23 05:44:06,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:06,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:06,414 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 [2022-07-23 05:44:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:06,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957138424] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:06,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:06,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-07-23 05:44:06,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932394169] [2022-07-23 05:44:06,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:06,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 05:44:06,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:06,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 05:44:06,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:44:06,431 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:06,575 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-07-23 05:44:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:44:06,576 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-23 05:44:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:06,576 INFO L225 Difference]: With dead ends: 51 [2022-07-23 05:44:06,576 INFO L226 Difference]: Without dead ends: 51 [2022-07-23 05:44:06,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-07-23 05:44:06,577 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 178 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:06,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 110 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:06,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-23 05:44:06,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2022-07-23 05:44:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 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) [2022-07-23 05:44:06,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-07-23 05:44:06,579 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2022-07-23 05:44:06,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:06,579 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-07-23 05:44:06,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:06,579 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-07-23 05:44:06,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 05:44:06,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:06,579 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:06,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:06,797 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 [2022-07-23 05:44:06,797 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:06,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:06,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1721723482, now seen corresponding path program 3 times [2022-07-23 05:44:06,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:06,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302835096] [2022-07-23 05:44:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:06,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:06,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:06,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302835096] [2022-07-23 05:44:06,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302835096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:06,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332957653] [2022-07-23 05:44:06,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:44:06,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:06,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:06,908 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) [2022-07-23 05:44:06,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-23 05:44:06,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-23 05:44:06,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:06,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-23 05:44:06,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:07,028 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 [2022-07-23 05:44:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:07,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:07,214 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 [2022-07-23 05:44:07,220 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 [2022-07-23 05:44:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:07,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332957653] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:07,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:07,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-07-23 05:44:07,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398007029] [2022-07-23 05:44:07,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:07,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 05:44:07,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:07,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 05:44:07,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-07-23 05:44:07,308 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:07,561 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2022-07-23 05:44:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:44:07,562 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-23 05:44:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:07,562 INFO L225 Difference]: With dead ends: 92 [2022-07-23 05:44:07,562 INFO L226 Difference]: Without dead ends: 79 [2022-07-23 05:44:07,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2022-07-23 05:44:07,563 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 205 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:07,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 184 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 225 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-07-23 05:44:07,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-23 05:44:07,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 48. [2022-07-23 05:44:07,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:07,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-07-23 05:44:07,565 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 31 [2022-07-23 05:44:07,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:07,565 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-07-23 05:44:07,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:07,565 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-07-23 05:44:07,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 05:44:07,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:07,566 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:07,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:07,775 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 [2022-07-23 05:44:07,775 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:07,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1481717885, now seen corresponding path program 3 times [2022-07-23 05:44:07,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:07,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981136470] [2022-07-23 05:44:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:07,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:07,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:07,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981136470] [2022-07-23 05:44:07,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981136470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:07,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479659407] [2022-07-23 05:44:07,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:44:07,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:07,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:07,889 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) [2022-07-23 05:44:07,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-23 05:44:07,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-23 05:44:07,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:07,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-23 05:44:07,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:08,007 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 [2022-07-23 05:44:08,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-23 05:44:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:08,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:08,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-07-23 05:44:08,236 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-23 05:44:08,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2022-07-23 05:44:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:08,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479659407] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:08,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:08,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 27 [2022-07-23 05:44:08,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048348083] [2022-07-23 05:44:08,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:08,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-23 05:44:08,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:08,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-23 05:44:08,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-07-23 05:44:08,370 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:08,684 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-07-23 05:44:08,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 05:44:08,684 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-23 05:44:08,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:08,685 INFO L225 Difference]: With dead ends: 66 [2022-07-23 05:44:08,685 INFO L226 Difference]: Without dead ends: 45 [2022-07-23 05:44:08,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2022-07-23 05:44:08,686 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 90 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:08,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 190 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:08,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-23 05:44:08,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-07-23 05:44:08,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-07-23 05:44:08,688 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2022-07-23 05:44:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:08,688 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-07-23 05:44:08,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:08,688 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-07-23 05:44:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 05:44:08,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:08,688 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:08,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:08,889 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 [2022-07-23 05:44:08,889 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:08,889 INFO L85 PathProgramCache]: Analyzing trace with hash 374629827, now seen corresponding path program 4 times [2022-07-23 05:44:08,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:08,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669509615] [2022-07-23 05:44:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:08,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:08,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:08,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669509615] [2022-07-23 05:44:08,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669509615] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:08,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959566367] [2022-07-23 05:44:08,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:44:08,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:08,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:08,988 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) [2022-07-23 05:44:08,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-23 05:44:09,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:44:09,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:09,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-23 05:44:09,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:09,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:09,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 05:44:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:09,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959566367] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:09,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:09,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 22 [2022-07-23 05:44:09,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377400339] [2022-07-23 05:44:09,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:09,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-23 05:44:09,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:09,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 05:44:09,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-07-23 05:44:09,346 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:09,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:09,558 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-07-23 05:44:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:44:09,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2022-07-23 05:44:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:09,559 INFO L225 Difference]: With dead ends: 55 [2022-07-23 05:44:09,559 INFO L226 Difference]: Without dead ends: 55 [2022-07-23 05:44:09,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:44:09,560 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 298 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:09,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 151 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:09,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-23 05:44:09,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-07-23 05:44:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:09,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-07-23 05:44:09,562 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2022-07-23 05:44:09,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:09,562 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-07-23 05:44:09,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:09,562 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-07-23 05:44:09,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-23 05:44:09,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:09,563 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:09,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:09,775 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 [2022-07-23 05:44:09,776 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:09,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:09,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1667122081, now seen corresponding path program 5 times [2022-07-23 05:44:09,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:09,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572423058] [2022-07-23 05:44:09,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:09,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:09,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:09,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572423058] [2022-07-23 05:44:09,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572423058] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:09,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339109332] [2022-07-23 05:44:09,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:44:09,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:09,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:09,915 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) [2022-07-23 05:44:09,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-23 05:44:10,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-23 05:44:10,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:10,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-23 05:44:10,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:10,124 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 [2022-07-23 05:44:10,214 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 [2022-07-23 05:44:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:10,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:10,264 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 [2022-07-23 05:44:10,266 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 [2022-07-23 05:44:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:10,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339109332] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:10,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:10,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-07-23 05:44:10,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115401154] [2022-07-23 05:44:10,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:10,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 05:44:10,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:10,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 05:44:10,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-07-23 05:44:10,430 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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) [2022-07-23 05:44:10,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:10,883 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2022-07-23 05:44:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 05:44:10,883 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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) Word has length 40 [2022-07-23 05:44:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:10,884 INFO L225 Difference]: With dead ends: 90 [2022-07-23 05:44:10,884 INFO L226 Difference]: Without dead ends: 56 [2022-07-23 05:44:10,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2022-07-23 05:44:10,885 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:10,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 285 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:44:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-23 05:44:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2022-07-23 05:44:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2022-07-23 05:44:10,886 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 40 [2022-07-23 05:44:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:10,887 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2022-07-23 05:44:10,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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) [2022-07-23 05:44:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2022-07-23 05:44:10,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-23 05:44:10,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:10,887 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:10,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:11,099 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 [2022-07-23 05:44:11,099 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash 537281572, now seen corresponding path program 6 times [2022-07-23 05:44:11,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:11,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173483264] [2022-07-23 05:44:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:11,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:11,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:11,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173483264] [2022-07-23 05:44:11,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173483264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:11,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181536951] [2022-07-23 05:44:11,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:44:11,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:11,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:11,245 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) [2022-07-23 05:44:11,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-23 05:44:11,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-23 05:44:11,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:11,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-23 05:44:11,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:11,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:11,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-23 05:44:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:11,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181536951] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:11,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:11,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 30 [2022-07-23 05:44:11,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159812909] [2022-07-23 05:44:11,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:11,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-23 05:44:11,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:11,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-23 05:44:11,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:44:11,786 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 31 states, 30 states have (on average 3.6) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:12,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:12,092 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-07-23 05:44:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 05:44:12,092 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.6) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-23 05:44:12,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:12,093 INFO L225 Difference]: With dead ends: 66 [2022-07-23 05:44:12,093 INFO L226 Difference]: Without dead ends: 66 [2022-07-23 05:44:12,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=1312, Unknown=0, NotChecked=0, Total=1640 [2022-07-23 05:44:12,094 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 426 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:12,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 192 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:44:12,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-23 05:44:12,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-07-23 05:44:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-07-23 05:44:12,096 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 44 [2022-07-23 05:44:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:12,096 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-07-23 05:44:12,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.6) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:12,096 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-07-23 05:44:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-23 05:44:12,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:12,097 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:12,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:12,297 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 [2022-07-23 05:44:12,298 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:12,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:12,298 INFO L85 PathProgramCache]: Analyzing trace with hash 967653856, now seen corresponding path program 7 times [2022-07-23 05:44:12,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:12,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352798533] [2022-07-23 05:44:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:12,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:12,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:12,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352798533] [2022-07-23 05:44:12,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352798533] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:12,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921433383] [2022-07-23 05:44:12,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:44:12,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:12,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:12,454 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) [2022-07-23 05:44:12,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-23 05:44:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:12,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-23 05:44:12,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:12,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 05:44:12,764 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 [2022-07-23 05:44:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:12,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:12,824 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 [2022-07-23 05:44:12,825 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 [2022-07-23 05:44:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:12,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921433383] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:12,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:12,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 29 [2022-07-23 05:44:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880360878] [2022-07-23 05:44:12,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:12,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-23 05:44:12,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:12,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-23 05:44:12,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-07-23 05:44:12,940 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:13,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:13,326 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2022-07-23 05:44:13,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 05:44:13,326 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-23 05:44:13,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:13,326 INFO L225 Difference]: With dead ends: 100 [2022-07-23 05:44:13,327 INFO L226 Difference]: Without dead ends: 67 [2022-07-23 05:44:13,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2022-07-23 05:44:13,327 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 97 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:13,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 436 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 606 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-07-23 05:44:13,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-23 05:44:13,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-07-23 05:44:13,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-07-23 05:44:13,345 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 49 [2022-07-23 05:44:13,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:13,345 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-07-23 05:44:13,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-07-23 05:44:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-23 05:44:13,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:13,345 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:13,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:13,546 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 [2022-07-23 05:44:13,546 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:13,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:13,547 INFO L85 PathProgramCache]: Analyzing trace with hash 999955645, now seen corresponding path program 8 times [2022-07-23 05:44:13,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:13,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31079260] [2022-07-23 05:44:13,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:13,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:13,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:13,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31079260] [2022-07-23 05:44:13,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31079260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:13,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476834066] [2022-07-23 05:44:13,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:44:13,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:13,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:13,728 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) [2022-07-23 05:44:13,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-23 05:44:13,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:44:13,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:13,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-23 05:44:13,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:13,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:14,177 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 5 treesize of output 3 [2022-07-23 05:44:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:14,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476834066] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:14,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:14,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2022-07-23 05:44:14,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375454774] [2022-07-23 05:44:14,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:14,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-23 05:44:14,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:14,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-23 05:44:14,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-07-23 05:44:14,208 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:14,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:14,538 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-07-23 05:44:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:44:14,539 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-23 05:44:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:14,539 INFO L225 Difference]: With dead ends: 77 [2022-07-23 05:44:14,539 INFO L226 Difference]: Without dead ends: 77 [2022-07-23 05:44:14,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=1254, Unknown=0, NotChecked=0, Total=1560 [2022-07-23 05:44:14,540 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 379 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:14,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 322 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:44:14,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-23 05:44:14,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2022-07-23 05:44:14,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2022-07-23 05:44:14,542 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 53 [2022-07-23 05:44:14,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:14,542 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2022-07-23 05:44:14,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 32 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:14,542 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2022-07-23 05:44:14,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-23 05:44:14,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:14,543 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:14,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:14,751 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 [2022-07-23 05:44:14,751 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:14,752 INFO L85 PathProgramCache]: Analyzing trace with hash -36316953, now seen corresponding path program 9 times [2022-07-23 05:44:14,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:14,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186113241] [2022-07-23 05:44:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:14,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:15,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:15,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186113241] [2022-07-23 05:44:15,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186113241] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:15,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923676378] [2022-07-23 05:44:15,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:44:15,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:15,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:15,003 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) [2022-07-23 05:44:15,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-23 05:44:15,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-23 05:44:15,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:15,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-23 05:44:15,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:15,098 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 [2022-07-23 05:44:15,174 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 [2022-07-23 05:44:15,550 INFO L356 Elim1Store]: treesize reduction 3, result has 72.7 percent of original size [2022-07-23 05:44:15,550 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 16 [2022-07-23 05:44:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-23 05:44:15,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:15,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-07-23 05:44:15,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-23 05:44:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-23 05:44:16,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923676378] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:16,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:16,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 8] total 32 [2022-07-23 05:44:16,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799117327] [2022-07-23 05:44:16,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:16,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-23 05:44:16,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:16,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-23 05:44:16,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2022-07-23 05:44:16,086 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:17,067 INFO L93 Difference]: Finished difference Result 144 states and 161 transitions. [2022-07-23 05:44:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-23 05:44:17,067 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-23 05:44:17,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:17,068 INFO L225 Difference]: With dead ends: 144 [2022-07-23 05:44:17,068 INFO L226 Difference]: Without dead ends: 141 [2022-07-23 05:44:17,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=346, Invalid=3944, Unknown=0, NotChecked=0, Total=4290 [2022-07-23 05:44:17,069 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:17,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 422 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 345 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-07-23 05:44:17,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-23 05:44:17,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 126. [2022-07-23 05:44:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.144) internal successors, (143), 125 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) [2022-07-23 05:44:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 143 transitions. [2022-07-23 05:44:17,072 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 143 transitions. Word has length 58 [2022-07-23 05:44:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:17,072 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 143 transitions. [2022-07-23 05:44:17,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 32 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 143 transitions. [2022-07-23 05:44:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-23 05:44:17,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:17,073 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:17,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:17,276 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 [2022-07-23 05:44:17,276 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:17,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:17,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1191879466, now seen corresponding path program 4 times [2022-07-23 05:44:17,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:17,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080371996] [2022-07-23 05:44:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:17,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:17,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:17,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080371996] [2022-07-23 05:44:17,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080371996] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:17,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735403104] [2022-07-23 05:44:17,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:44:17,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:17,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:17,544 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) [2022-07-23 05:44:17,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-23 05:44:17,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:44:17,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:17,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-23 05:44:17,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:17,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 05:44:17,867 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:44:17,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:44:17,920 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 [2022-07-23 05:44:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:17,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:17,991 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 13 [2022-07-23 05:44:17,994 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 [2022-07-23 05:44:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:18,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735403104] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:18,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:18,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 32 [2022-07-23 05:44:18,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858963373] [2022-07-23 05:44:18,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:18,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-23 05:44:18,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-23 05:44:18,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2022-07-23 05:44:18,121 INFO L87 Difference]: Start difference. First operand 126 states and 143 transitions. Second operand has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:18,646 INFO L93 Difference]: Finished difference Result 162 states and 182 transitions. [2022-07-23 05:44:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 05:44:18,646 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-23 05:44:18,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:18,647 INFO L225 Difference]: With dead ends: 162 [2022-07-23 05:44:18,647 INFO L226 Difference]: Without dead ends: 103 [2022-07-23 05:44:18,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2022-07-23 05:44:18,648 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 173 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:18,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 576 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 775 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-07-23 05:44:18,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-23 05:44:18,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2022-07-23 05:44:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 99 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2022-07-23 05:44:18,652 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 60 [2022-07-23 05:44:18,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:18,652 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2022-07-23 05:44:18,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 32 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:18,653 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2022-07-23 05:44:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-23 05:44:18,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:18,653 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:18,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-23 05:44:18,858 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 [2022-07-23 05:44:18,858 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:18,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:18,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1846000595, now seen corresponding path program 5 times [2022-07-23 05:44:18,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:18,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677901442] [2022-07-23 05:44:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:18,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 28 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:19,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:19,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677901442] [2022-07-23 05:44:19,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677901442] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:19,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853978051] [2022-07-23 05:44:19,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:44:19,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:19,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:19,088 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) [2022-07-23 05:44:19,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-23 05:44:19,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-23 05:44:19,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:19,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-23 05:44:19,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:19,176 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 [2022-07-23 05:44:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:19,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:20,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853978051] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:20,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:20,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 19] total 49 [2022-07-23 05:44:20,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477044923] [2022-07-23 05:44:20,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:20,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-23 05:44:20,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:20,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-23 05:44:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2022-07-23 05:44:20,538 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 50 states, 49 states have (on average 3.795918367346939) internal successors, (186), 50 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:21,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:21,942 INFO L93 Difference]: Finished difference Result 311 states and 357 transitions. [2022-07-23 05:44:21,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-23 05:44:21,942 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.795918367346939) internal successors, (186), 50 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-23 05:44:21,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:21,943 INFO L225 Difference]: With dead ends: 311 [2022-07-23 05:44:21,943 INFO L226 Difference]: Without dead ends: 311 [2022-07-23 05:44:21,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1179, Invalid=4983, Unknown=0, NotChecked=0, Total=6162 [2022-07-23 05:44:21,945 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1101 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:21,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1101 Valid, 767 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 05:44:21,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-07-23 05:44:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 202. [2022-07-23 05:44:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.154228855721393) internal successors, (232), 201 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:21,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 232 transitions. [2022-07-23 05:44:21,948 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 232 transitions. Word has length 64 [2022-07-23 05:44:21,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:21,948 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 232 transitions. [2022-07-23 05:44:21,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.795918367346939) internal successors, (186), 50 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:21,948 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 232 transitions. [2022-07-23 05:44:21,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-23 05:44:21,948 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:21,948 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:21,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:22,149 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 [2022-07-23 05:44:22,149 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:22,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1045878647, now seen corresponding path program 6 times [2022-07-23 05:44:22,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:22,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964613163] [2022-07-23 05:44:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:22,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:22,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:22,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964613163] [2022-07-23 05:44:22,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964613163] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:22,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734515786] [2022-07-23 05:44:22,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:44:22,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:22,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:22,456 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) [2022-07-23 05:44:22,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-23 05:44:22,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-23 05:44:22,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:22,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-23 05:44:22,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:22,763 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 [2022-07-23 05:44:22,852 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:44:22,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:44:22,923 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 [2022-07-23 05:44:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:22,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:22,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-23 05:44:22,996 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 [2022-07-23 05:44:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:23,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734515786] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:23,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:23,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 37 [2022-07-23 05:44:23,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230135392] [2022-07-23 05:44:23,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:23,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-23 05:44:23,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:23,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-23 05:44:23,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2022-07-23 05:44:23,158 INFO L87 Difference]: Start difference. First operand 202 states and 232 transitions. Second operand has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:23,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:23,731 INFO L93 Difference]: Finished difference Result 193 states and 217 transitions. [2022-07-23 05:44:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-23 05:44:23,731 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-23 05:44:23,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:23,732 INFO L225 Difference]: With dead ends: 193 [2022-07-23 05:44:23,732 INFO L226 Difference]: Without dead ends: 119 [2022-07-23 05:44:23,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=2598, Unknown=0, NotChecked=0, Total=2862 [2022-07-23 05:44:23,734 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 220 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:23,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 787 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1100 Invalid, 0 Unknown, 36 Unchecked, 0.3s Time] [2022-07-23 05:44:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-23 05:44:23,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-07-23 05:44:23,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1304347826086956) internal successors, (130), 115 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2022-07-23 05:44:23,743 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 69 [2022-07-23 05:44:23,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:23,743 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2022-07-23 05:44:23,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2022-07-23 05:44:23,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-23 05:44:23,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:23,749 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:23,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:23,967 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 [2022-07-23 05:44:23,967 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:23,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:23,968 INFO L85 PathProgramCache]: Analyzing trace with hash -83187244, now seen corresponding path program 7 times [2022-07-23 05:44:23,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:23,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823067998] [2022-07-23 05:44:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:23,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 45 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:24,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:24,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823067998] [2022-07-23 05:44:24,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823067998] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:24,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939102828] [2022-07-23 05:44:24,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:44:24,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:24,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:24,282 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) [2022-07-23 05:44:24,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-23 05:44:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:24,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-23 05:44:24,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 66 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:24,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:24,931 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 [2022-07-23 05:44:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 66 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:24,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939102828] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:24,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:24,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 39 [2022-07-23 05:44:24,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785578910] [2022-07-23 05:44:24,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:24,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-23 05:44:24,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:24,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-23 05:44:24,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560 [2022-07-23 05:44:24,972 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 40 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:25,396 INFO L93 Difference]: Finished difference Result 140 states and 158 transitions. [2022-07-23 05:44:25,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 05:44:25,396 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-23 05:44:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:25,397 INFO L225 Difference]: With dead ends: 140 [2022-07-23 05:44:25,397 INFO L226 Difference]: Without dead ends: 140 [2022-07-23 05:44:25,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1985, Unknown=0, NotChecked=0, Total=2450 [2022-07-23 05:44:25,400 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 490 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:25,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 578 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:44:25,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-23 05:44:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2022-07-23 05:44:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 127 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) [2022-07-23 05:44:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2022-07-23 05:44:25,423 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 73 [2022-07-23 05:44:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:25,423 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2022-07-23 05:44:25,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2022-07-23 05:44:25,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-23 05:44:25,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:25,424 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:25,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:25,643 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 [2022-07-23 05:44:25,644 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:25,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:25,664 INFO L85 PathProgramCache]: Analyzing trace with hash 653582896, now seen corresponding path program 8 times [2022-07-23 05:44:25,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:25,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973545728] [2022-07-23 05:44:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:25,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:26,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:26,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973545728] [2022-07-23 05:44:26,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973545728] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:26,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050634302] [2022-07-23 05:44:26,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:44:26,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:26,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:26,054 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) [2022-07-23 05:44:26,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-23 05:44:26,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:44:26,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:26,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-23 05:44:26,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:26,192 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 [2022-07-23 05:44:26,538 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 [2022-07-23 05:44:26,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:44:26,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:44:27,406 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:44:27,407 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 [2022-07-23 05:44:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 66 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:27,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:28,528 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 [2022-07-23 05:44:28,531 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 [2022-07-23 05:44:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 91 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:29,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050634302] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:29,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:29,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 66 [2022-07-23 05:44:29,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804153546] [2022-07-23 05:44:29,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:29,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-23 05:44:29,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:29,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-23 05:44:29,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=3981, Unknown=0, NotChecked=0, Total=4290 [2022-07-23 05:44:29,493 INFO L87 Difference]: Start difference. First operand 128 states and 144 transitions. Second operand has 66 states, 66 states have (on average 3.4545454545454546) internal successors, (228), 66 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:30,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:30,721 INFO L93 Difference]: Finished difference Result 260 states and 295 transitions. [2022-07-23 05:44:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-23 05:44:30,722 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.4545454545454546) internal successors, (228), 66 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-07-23 05:44:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:30,725 INFO L225 Difference]: With dead ends: 260 [2022-07-23 05:44:30,725 INFO L226 Difference]: Without dead ends: 254 [2022-07-23 05:44:30,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=654, Invalid=7356, Unknown=0, NotChecked=0, Total=8010 [2022-07-23 05:44:30,727 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 250 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:30,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1089 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 715 Invalid, 0 Unknown, 125 Unchecked, 0.3s Time] [2022-07-23 05:44:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-07-23 05:44:30,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 200. [2022-07-23 05:44:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.150753768844221) internal successors, (229), 199 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 229 transitions. [2022-07-23 05:44:30,732 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 229 transitions. Word has length 78 [2022-07-23 05:44:30,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:30,732 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 229 transitions. [2022-07-23 05:44:30,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.4545454545454546) internal successors, (228), 66 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:30,732 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 229 transitions. [2022-07-23 05:44:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-23 05:44:30,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:30,733 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:30,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:30,959 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 [2022-07-23 05:44:30,959 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:30,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1524452150, now seen corresponding path program 9 times [2022-07-23 05:44:30,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:30,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309474144] [2022-07-23 05:44:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:30,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:31,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:31,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309474144] [2022-07-23 05:44:31,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309474144] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:31,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897502216] [2022-07-23 05:44:31,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:44:31,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:31,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:31,247 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) [2022-07-23 05:44:31,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-23 05:44:31,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-23 05:44:31,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:31,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-23 05:44:31,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:31,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 05:44:31,683 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-23 05:44:31,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-23 05:44:31,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 05:44:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:31,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:31,813 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 [2022-07-23 05:44:31,814 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 [2022-07-23 05:44:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:31,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897502216] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:31,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:31,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2022-07-23 05:44:31,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67318928] [2022-07-23 05:44:31,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:31,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-23 05:44:31,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:31,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-23 05:44:31,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2022-07-23 05:44:31,959 INFO L87 Difference]: Start difference. First operand 200 states and 229 transitions. Second operand has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:32,723 INFO L93 Difference]: Finished difference Result 320 states and 364 transitions. [2022-07-23 05:44:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-23 05:44:32,724 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-07-23 05:44:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:32,724 INFO L225 Difference]: With dead ends: 320 [2022-07-23 05:44:32,724 INFO L226 Difference]: Without dead ends: 250 [2022-07-23 05:44:32,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 136 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=263, Invalid=2817, Unknown=0, NotChecked=0, Total=3080 [2022-07-23 05:44:32,726 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 115 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:32,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 894 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1172 Invalid, 0 Unknown, 91 Unchecked, 0.4s Time] [2022-07-23 05:44:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-23 05:44:32,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 200. [2022-07-23 05:44:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.1457286432160805) internal successors, (228), 199 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 228 transitions. [2022-07-23 05:44:32,728 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 228 transitions. Word has length 78 [2022-07-23 05:44:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:32,729 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 228 transitions. [2022-07-23 05:44:32,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 228 transitions. [2022-07-23 05:44:32,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-23 05:44:32,729 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:32,729 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:32,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:32,947 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 [2022-07-23 05:44:32,947 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:32,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:32,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1677653747, now seen corresponding path program 10 times [2022-07-23 05:44:32,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:32,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812729555] [2022-07-23 05:44:32,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:32,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:33,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:33,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812729555] [2022-07-23 05:44:33,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812729555] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:33,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90973117] [2022-07-23 05:44:33,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:44:33,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:33,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:33,239 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) [2022-07-23 05:44:33,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-23 05:44:33,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:44:33,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:33,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-23 05:44:33,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:33,534 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 [2022-07-23 05:44:33,621 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:44:33,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:44:33,658 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-23 05:44:33,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-23 05:44:33,689 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 [2022-07-23 05:44:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:33,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:33,778 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 13 [2022-07-23 05:44:33,780 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 [2022-07-23 05:44:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:33,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90973117] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:33,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:33,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2022-07-23 05:44:33,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995590501] [2022-07-23 05:44:33,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:33,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-23 05:44:33,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:33,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-23 05:44:33,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2022-07-23 05:44:33,948 INFO L87 Difference]: Start difference. First operand 200 states and 228 transitions. Second operand has 38 states, 38 states have (on average 3.5) internal successors, (133), 38 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:34,913 INFO L93 Difference]: Finished difference Result 248 states and 280 transitions. [2022-07-23 05:44:34,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-23 05:44:34,913 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5) internal successors, (133), 38 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-23 05:44:34,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:34,914 INFO L225 Difference]: With dead ends: 248 [2022-07-23 05:44:34,914 INFO L226 Difference]: Without dead ends: 165 [2022-07-23 05:44:34,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 140 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=3429, Unknown=0, NotChecked=0, Total=3782 [2022-07-23 05:44:34,915 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 459 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:34,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 831 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 05:44:34,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-23 05:44:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2022-07-23 05:44:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.1428571428571428) internal successors, (184), 161 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 184 transitions. [2022-07-23 05:44:34,918 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 184 transitions. Word has length 80 [2022-07-23 05:44:34,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:34,918 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 184 transitions. [2022-07-23 05:44:34,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5) internal successors, (133), 38 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 184 transitions. [2022-07-23 05:44:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-23 05:44:34,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:34,921 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:34,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:35,131 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 [2022-07-23 05:44:35,131 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:35,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:35,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2135505677, now seen corresponding path program 11 times [2022-07-23 05:44:35,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:35,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080972088] [2022-07-23 05:44:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:35,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 66 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:35,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:35,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080972088] [2022-07-23 05:44:35,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080972088] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:35,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891118730] [2022-07-23 05:44:35,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:44:35,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:35,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:35,407 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) [2022-07-23 05:44:35,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-23 05:44:35,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-23 05:44:35,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:35,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-23 05:44:35,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:35,562 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 [2022-07-23 05:44:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 91 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:35,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 120 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:36,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891118730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:36,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:36,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 57 [2022-07-23 05:44:36,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981428758] [2022-07-23 05:44:36,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:36,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-23 05:44:36,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:36,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-23 05:44:36,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=2877, Unknown=0, NotChecked=0, Total=3306 [2022-07-23 05:44:36,691 INFO L87 Difference]: Start difference. First operand 162 states and 184 transitions. Second operand has 58 states, 57 states have (on average 4.192982456140351) internal successors, (239), 58 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:37,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:37,106 INFO L93 Difference]: Finished difference Result 188 states and 214 transitions. [2022-07-23 05:44:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 05:44:37,107 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 4.192982456140351) internal successors, (239), 58 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-23 05:44:37,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:37,109 INFO L225 Difference]: With dead ends: 188 [2022-07-23 05:44:37,109 INFO L226 Difference]: Without dead ends: 188 [2022-07-23 05:44:37,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=832, Invalid=3860, Unknown=0, NotChecked=0, Total=4692 [2022-07-23 05:44:37,110 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 686 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:37,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 749 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:44:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-23 05:44:37,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 144. [2022-07-23 05:44:37,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.132867132867133) internal successors, (162), 143 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:37,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2022-07-23 05:44:37,121 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 82 [2022-07-23 05:44:37,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:37,121 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2022-07-23 05:44:37,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 4.192982456140351) internal successors, (239), 58 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:37,121 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2022-07-23 05:44:37,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-23 05:44:37,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:37,123 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:37,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-23 05:44:37,337 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 [2022-07-23 05:44:37,337 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:37,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:37,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1292013839, now seen corresponding path program 12 times [2022-07-23 05:44:37,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:37,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012089169] [2022-07-23 05:44:37,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:37,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:37,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:37,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012089169] [2022-07-23 05:44:37,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012089169] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:37,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017312670] [2022-07-23 05:44:37,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:44:37,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:37,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:37,660 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) [2022-07-23 05:44:37,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-23 05:44:37,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-23 05:44:37,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:37,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-23 05:44:37,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:38,063 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 [2022-07-23 05:44:38,158 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:44:38,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:44:38,237 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 [2022-07-23 05:44:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:38,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:38,338 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 [2022-07-23 05:44:38,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-23 05:44:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:38,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017312670] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:38,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:38,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2022-07-23 05:44:38,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898515810] [2022-07-23 05:44:38,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:38,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-23 05:44:38,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:38,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-23 05:44:38,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2022-07-23 05:44:38,511 INFO L87 Difference]: Start difference. First operand 144 states and 162 transitions. Second operand has 41 states, 41 states have (on average 3.5121951219512195) internal successors, (144), 41 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) [2022-07-23 05:44:39,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:39,193 INFO L93 Difference]: Finished difference Result 249 states and 281 transitions. [2022-07-23 05:44:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-23 05:44:39,193 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.5121951219512195) internal successors, (144), 41 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 87 [2022-07-23 05:44:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:39,194 INFO L225 Difference]: With dead ends: 249 [2022-07-23 05:44:39,194 INFO L226 Difference]: Without dead ends: 151 [2022-07-23 05:44:39,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 149 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=298, Invalid=3484, Unknown=0, NotChecked=0, Total=3782 [2022-07-23 05:44:39,195 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 213 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:39,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1104 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1459 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2022-07-23 05:44:39,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-23 05:44:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2022-07-23 05:44:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.129251700680272) internal successors, (166), 147 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 166 transitions. [2022-07-23 05:44:39,197 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 166 transitions. Word has length 87 [2022-07-23 05:44:39,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:39,197 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 166 transitions. [2022-07-23 05:44:39,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5121951219512195) internal successors, (144), 41 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) [2022-07-23 05:44:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 166 transitions. [2022-07-23 05:44:39,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-23 05:44:39,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:39,197 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:39,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:39,398 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 [2022-07-23 05:44:39,398 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:39,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:39,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1141261326, now seen corresponding path program 13 times [2022-07-23 05:44:39,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:39,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968583533] [2022-07-23 05:44:39,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:39,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:39,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:39,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968583533] [2022-07-23 05:44:39,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968583533] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:39,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792516433] [2022-07-23 05:44:39,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:44:39,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:39,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:39,708 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) [2022-07-23 05:44:39,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-23 05:44:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:39,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-23 05:44:39,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 120 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:40,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:40,304 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 [2022-07-23 05:44:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 120 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:40,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792516433] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:40,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:40,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 47 [2022-07-23 05:44:40,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099350800] [2022-07-23 05:44:40,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:40,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-23 05:44:40,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:40,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-23 05:44:40,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1974, Unknown=0, NotChecked=0, Total=2256 [2022-07-23 05:44:40,338 INFO L87 Difference]: Start difference. First operand 148 states and 166 transitions. Second operand has 48 states, 47 states have (on average 4.0) internal successors, (188), 48 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) [2022-07-23 05:44:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:40,784 INFO L93 Difference]: Finished difference Result 172 states and 194 transitions. [2022-07-23 05:44:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-23 05:44:40,785 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.0) internal successors, (188), 48 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) Word has length 91 [2022-07-23 05:44:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:40,786 INFO L225 Difference]: With dead ends: 172 [2022-07-23 05:44:40,786 INFO L226 Difference]: Without dead ends: 172 [2022-07-23 05:44:40,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=660, Invalid=2880, Unknown=0, NotChecked=0, Total=3540 [2022-07-23 05:44:40,788 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 491 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:40,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 816 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:44:40,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-23 05:44:40,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2022-07-23 05:44:40,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.1320754716981132) internal successors, (180), 159 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2022-07-23 05:44:40,809 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 91 [2022-07-23 05:44:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:40,810 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2022-07-23 05:44:40,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.0) internal successors, (188), 48 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) [2022-07-23 05:44:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2022-07-23 05:44:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-23 05:44:40,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:40,810 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:40,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:41,011 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 [2022-07-23 05:44:41,012 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:41,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:41,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1881316406, now seen corresponding path program 14 times [2022-07-23 05:44:41,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:41,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192297279] [2022-07-23 05:44:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:41,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:41,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:41,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192297279] [2022-07-23 05:44:41,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192297279] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:41,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596537469] [2022-07-23 05:44:41,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:44:41,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:41,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:41,340 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) [2022-07-23 05:44:41,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-23 05:44:41,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:44:41,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:41,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-23 05:44:41,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:41,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 05:44:41,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:44:41,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:44:42,464 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:44:42,465 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 [2022-07-23 05:44:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 120 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:42,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:43,536 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 [2022-07-23 05:44:43,540 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 [2022-07-23 05:44:43,543 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 [2022-07-23 05:44:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 120 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:43,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596537469] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:43,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:43,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 66 [2022-07-23 05:44:43,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367890870] [2022-07-23 05:44:43,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:43,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-23 05:44:43,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:43,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-23 05:44:43,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3965, Unknown=0, NotChecked=0, Total=4290 [2022-07-23 05:44:43,619 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand has 66 states, 66 states have (on average 3.696969696969697) internal successors, (244), 66 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:45,085 INFO L93 Difference]: Finished difference Result 326 states and 371 transitions. [2022-07-23 05:44:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-23 05:44:45,085 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.696969696969697) internal successors, (244), 66 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-07-23 05:44:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:45,086 INFO L225 Difference]: With dead ends: 326 [2022-07-23 05:44:45,086 INFO L226 Difference]: Without dead ends: 320 [2022-07-23 05:44:45,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 176 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=551, Invalid=6255, Unknown=0, NotChecked=0, Total=6806 [2022-07-23 05:44:45,087 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 273 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:45,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 1577 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1055 Invalid, 0 Unknown, 150 Unchecked, 0.4s Time] [2022-07-23 05:44:45,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-07-23 05:44:45,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 252. [2022-07-23 05:44:45,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.151394422310757) internal successors, (289), 251 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 289 transitions. [2022-07-23 05:44:45,090 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 289 transitions. Word has length 96 [2022-07-23 05:44:45,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:45,090 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 289 transitions. [2022-07-23 05:44:45,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.696969696969697) internal successors, (244), 66 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 289 transitions. [2022-07-23 05:44:45,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-23 05:44:45,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:45,091 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:45,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:45,292 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 [2022-07-23 05:44:45,292 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:45,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:45,292 INFO L85 PathProgramCache]: Analyzing trace with hash 105215568, now seen corresponding path program 15 times [2022-07-23 05:44:45,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:45,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900464396] [2022-07-23 05:44:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:45,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:45,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:45,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900464396] [2022-07-23 05:44:45,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900464396] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:45,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779545931] [2022-07-23 05:44:45,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:44:45,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:45,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:45,711 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) [2022-07-23 05:44:45,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-23 05:44:45,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-23 05:44:45,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:45,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-23 05:44:45,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:46,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-07-23 05:44:46,225 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-23 05:44:46,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-23 05:44:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:46,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:46,346 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 [2022-07-23 05:44:46,348 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 [2022-07-23 05:44:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:46,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779545931] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:46,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:46,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 45 [2022-07-23 05:44:46,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576489765] [2022-07-23 05:44:46,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:46,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-23 05:44:46,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:46,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-23 05:44:46,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1857, Unknown=0, NotChecked=0, Total=1980 [2022-07-23 05:44:46,516 INFO L87 Difference]: Start difference. First operand 252 states and 289 transitions. Second operand has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 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) [2022-07-23 05:44:47,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:47,337 INFO L93 Difference]: Finished difference Result 310 states and 353 transitions. [2022-07-23 05:44:47,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-23 05:44:47,337 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 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 96 [2022-07-23 05:44:47,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:47,338 INFO L225 Difference]: With dead ends: 310 [2022-07-23 05:44:47,338 INFO L226 Difference]: Without dead ends: 207 [2022-07-23 05:44:47,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 166 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=4231, Unknown=0, NotChecked=0, Total=4556 [2022-07-23 05:44:47,348 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 301 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 1913 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:47,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1380 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1913 Invalid, 0 Unknown, 61 Unchecked, 0.4s Time] [2022-07-23 05:44:47,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-23 05:44:47,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2022-07-23 05:44:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.1428571428571428) internal successors, (232), 203 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:47,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 232 transitions. [2022-07-23 05:44:47,351 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 232 transitions. Word has length 96 [2022-07-23 05:44:47,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:47,351 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 232 transitions. [2022-07-23 05:44:47,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 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) [2022-07-23 05:44:47,352 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 232 transitions. [2022-07-23 05:44:47,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-23 05:44:47,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:47,352 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:47,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:47,567 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 [2022-07-23 05:44:47,567 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:47,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:47,568 INFO L85 PathProgramCache]: Analyzing trace with hash -441577005, now seen corresponding path program 16 times [2022-07-23 05:44:47,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:47,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572279181] [2022-07-23 05:44:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:47,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 120 proven. 305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:47,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:47,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572279181] [2022-07-23 05:44:47,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572279181] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:47,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824848467] [2022-07-23 05:44:47,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:44:47,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:47,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:47,937 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) [2022-07-23 05:44:47,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-23 05:44:48,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:44:48,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:48,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-23 05:44:48,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:48,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:48,729 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 [2022-07-23 05:44:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:48,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824848467] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:48,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:48,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 50 [2022-07-23 05:44:48,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391660414] [2022-07-23 05:44:48,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:48,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-23 05:44:48,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:48,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-23 05:44:48,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2281, Unknown=0, NotChecked=0, Total=2550 [2022-07-23 05:44:48,787 INFO L87 Difference]: Start difference. First operand 204 states and 232 transitions. Second operand has 51 states, 50 states have (on average 4.08) internal successors, (204), 51 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) [2022-07-23 05:44:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:49,666 INFO L93 Difference]: Finished difference Result 230 states and 262 transitions. [2022-07-23 05:44:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-23 05:44:49,667 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.08) internal successors, (204), 51 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 100 [2022-07-23 05:44:49,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:49,676 INFO L225 Difference]: With dead ends: 230 [2022-07-23 05:44:49,677 INFO L226 Difference]: Without dead ends: 230 [2022-07-23 05:44:49,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=968, Invalid=4288, Unknown=0, NotChecked=0, Total=5256 [2022-07-23 05:44:49,678 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 867 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:49,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 963 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 05:44:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-07-23 05:44:49,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 176. [2022-07-23 05:44:49,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.1314285714285715) internal successors, (198), 175 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:49,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 198 transitions. [2022-07-23 05:44:49,683 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 198 transitions. Word has length 100 [2022-07-23 05:44:49,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:49,684 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 198 transitions. [2022-07-23 05:44:49,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.08) internal successors, (204), 51 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) [2022-07-23 05:44:49,684 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 198 transitions. [2022-07-23 05:44:49,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-23 05:44:49,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:49,685 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:49,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:49,902 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 [2022-07-23 05:44:49,902 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:49,902 INFO L85 PathProgramCache]: Analyzing trace with hash -997573781, now seen corresponding path program 17 times [2022-07-23 05:44:49,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:49,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676100360] [2022-07-23 05:44:49,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:49,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:50,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:50,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676100360] [2022-07-23 05:44:50,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676100360] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:50,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709704759] [2022-07-23 05:44:50,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:44:50,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:50,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:50,303 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) [2022-07-23 05:44:50,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-23 05:44:50,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-23 05:44:50,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:50,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-23 05:44:50,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:50,842 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 [2022-07-23 05:44:50,948 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:44:50,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:44:51,040 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 [2022-07-23 05:44:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:51,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:51,162 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 [2022-07-23 05:44:51,163 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 [2022-07-23 05:44:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:51,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709704759] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:51,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:51,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2022-07-23 05:44:51,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863105593] [2022-07-23 05:44:51,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:51,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-23 05:44:51,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:51,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-23 05:44:51,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2036, Unknown=0, NotChecked=0, Total=2162 [2022-07-23 05:44:51,346 INFO L87 Difference]: Start difference. First operand 176 states and 198 transitions. Second operand has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:53,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:53,045 INFO L93 Difference]: Finished difference Result 356 states and 403 transitions. [2022-07-23 05:44:53,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-23 05:44:53,045 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-07-23 05:44:53,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:53,046 INFO L225 Difference]: With dead ends: 356 [2022-07-23 05:44:53,046 INFO L226 Difference]: Without dead ends: 183 [2022-07-23 05:44:53,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 188 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=497, Invalid=6145, Unknown=0, NotChecked=0, Total=6642 [2022-07-23 05:44:53,047 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 589 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:53,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 1638 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-23 05:44:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-23 05:44:53,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2022-07-23 05:44:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.1284916201117319) internal successors, (202), 179 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2022-07-23 05:44:53,049 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 105 [2022-07-23 05:44:53,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:53,049 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2022-07-23 05:44:53,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:53,049 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2022-07-23 05:44:53,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-23 05:44:53,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:53,050 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:53,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:53,250 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 [2022-07-23 05:44:53,250 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:53,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:53,251 INFO L85 PathProgramCache]: Analyzing trace with hash 859104072, now seen corresponding path program 18 times [2022-07-23 05:44:53,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:53,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016573807] [2022-07-23 05:44:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:53,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:53,728 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 153 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:53,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:53,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016573807] [2022-07-23 05:44:53,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016573807] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:53,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922845500] [2022-07-23 05:44:53,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:44:53,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:53,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:53,756 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) [2022-07-23 05:44:53,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-23 05:44:54,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-23 05:44:54,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:44:54,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-23 05:44:54,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 190 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:54,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:55,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-23 05:44:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 190 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:55,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922845500] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:55,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:55,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 66 [2022-07-23 05:44:55,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185261644] [2022-07-23 05:44:55,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:55,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-23 05:44:55,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:55,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-23 05:44:55,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=3758, Unknown=0, NotChecked=0, Total=4422 [2022-07-23 05:44:55,135 INFO L87 Difference]: Start difference. First operand 180 states and 202 transitions. Second operand has 67 states, 66 states have (on average 4.166666666666667) internal successors, (275), 67 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:55,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:55,796 INFO L93 Difference]: Finished difference Result 204 states and 230 transitions. [2022-07-23 05:44:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-23 05:44:55,796 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 4.166666666666667) internal successors, (275), 67 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-07-23 05:44:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:55,797 INFO L225 Difference]: With dead ends: 204 [2022-07-23 05:44:55,797 INFO L226 Difference]: Without dead ends: 204 [2022-07-23 05:44:55,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1271, Invalid=5209, Unknown=0, NotChecked=0, Total=6480 [2022-07-23 05:44:55,798 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 1282 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:55,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1282 Valid, 752 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:44:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-07-23 05:44:55,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 192. [2022-07-23 05:44:55,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.130890052356021) internal successors, (216), 191 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 216 transitions. [2022-07-23 05:44:55,800 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 216 transitions. Word has length 109 [2022-07-23 05:44:55,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:55,800 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 216 transitions. [2022-07-23 05:44:55,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 4.166666666666667) internal successors, (275), 67 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 216 transitions. [2022-07-23 05:44:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-23 05:44:55,801 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:55,801 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:55,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-23 05:44:56,001 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 [2022-07-23 05:44:56,002 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:44:56,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:44:56,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2093452996, now seen corresponding path program 19 times [2022-07-23 05:44:56,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:44:56,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813507076] [2022-07-23 05:44:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:44:56,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:44:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:56,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:44:56,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813507076] [2022-07-23 05:44:56,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813507076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:44:56,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640521734] [2022-07-23 05:44:56,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:44:56,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:44:56,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:44:56,543 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) [2022-07-23 05:44:56,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-23 05:44:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:44:56,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-23 05:44:56,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:44:57,172 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 [2022-07-23 05:44:57,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-23 05:44:57,630 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 [2022-07-23 05:44:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:57,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:44:57,768 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 [2022-07-23 05:44:57,770 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 26 treesize of output 22 [2022-07-23 05:44:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:44:58,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640521734] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:44:58,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:44:58,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 74 [2022-07-23 05:44:58,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66272537] [2022-07-23 05:44:58,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:44:58,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-23 05:44:58,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:44:58,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-23 05:44:58,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5183, Unknown=0, NotChecked=0, Total=5402 [2022-07-23 05:44:58,433 INFO L87 Difference]: Start difference. First operand 192 states and 216 transitions. Second operand has 74 states, 74 states have (on average 3.6486486486486487) internal successors, (270), 74 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) [2022-07-23 05:44:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:44:59,932 INFO L93 Difference]: Finished difference Result 333 states and 377 transitions. [2022-07-23 05:44:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-23 05:44:59,932 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.6486486486486487) internal successors, (270), 74 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 114 [2022-07-23 05:44:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:44:59,933 INFO L225 Difference]: With dead ends: 333 [2022-07-23 05:44:59,933 INFO L226 Difference]: Without dead ends: 199 [2022-07-23 05:44:59,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=491, Invalid=9609, Unknown=0, NotChecked=0, Total=10100 [2022-07-23 05:44:59,935 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 586 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 3424 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 3698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:44:59,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 2504 Invalid, 3698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3424 Invalid, 0 Unknown, 81 Unchecked, 0.8s Time] [2022-07-23 05:44:59,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-23 05:44:59,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2022-07-23 05:44:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.1282051282051282) internal successors, (220), 195 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:44:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 220 transitions. [2022-07-23 05:44:59,938 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 220 transitions. Word has length 114 [2022-07-23 05:44:59,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:44:59,939 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 220 transitions. [2022-07-23 05:44:59,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.6486486486486487) internal successors, (270), 74 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) [2022-07-23 05:44:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 220 transitions. [2022-07-23 05:44:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-23 05:44:59,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:44:59,940 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:44:59,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-23 05:45:00,155 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 [2022-07-23 05:45:00,155 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:45:00,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:00,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1073720833, now seen corresponding path program 20 times [2022-07-23 05:45:00,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:45:00,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116720515] [2022-07-23 05:45:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:00,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:45:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 190 proven. 428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:00,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:45:00,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116720515] [2022-07-23 05:45:00,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116720515] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:45:00,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474891691] [2022-07-23 05:45:00,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:45:00,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:45:00,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:45:00,647 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) [2022-07-23 05:45:00,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-23 05:45:00,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:45:00,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:45:00,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-23 05:45:00,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 231 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:01,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:01,793 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 5 treesize of output 3 [2022-07-23 05:45:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 231 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:01,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474891691] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:01,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:45:01,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 29] total 58 [2022-07-23 05:45:01,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44100915] [2022-07-23 05:45:01,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:01,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-23 05:45:01,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:45:01,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-23 05:45:01,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=3070, Unknown=0, NotChecked=0, Total=3422 [2022-07-23 05:45:01,843 INFO L87 Difference]: Start difference. First operand 196 states and 220 transitions. Second operand has 59 states, 58 states have (on average 4.172413793103448) internal successors, (242), 59 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:02,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:02,981 INFO L93 Difference]: Finished difference Result 220 states and 248 transitions. [2022-07-23 05:45:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-23 05:45:02,982 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 4.172413793103448) internal successors, (242), 59 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2022-07-23 05:45:02,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:02,982 INFO L225 Difference]: With dead ends: 220 [2022-07-23 05:45:02,982 INFO L226 Difference]: Without dead ends: 220 [2022-07-23 05:45:02,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1307, Invalid=5833, Unknown=0, NotChecked=0, Total=7140 [2022-07-23 05:45:02,983 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1101 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:02,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1101 Valid, 1180 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1841 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 05:45:02,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-23 05:45:02,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2022-07-23 05:45:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.1304347826086956) internal successors, (234), 207 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 234 transitions. [2022-07-23 05:45:02,986 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 234 transitions. Word has length 118 [2022-07-23 05:45:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:02,986 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 234 transitions. [2022-07-23 05:45:02,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 4.172413793103448) internal successors, (242), 59 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 234 transitions. [2022-07-23 05:45:02,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-23 05:45:02,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:02,986 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:03,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:03,187 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 [2022-07-23 05:45:03,187 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:45:03,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:03,187 INFO L85 PathProgramCache]: Analyzing trace with hash 715693285, now seen corresponding path program 21 times [2022-07-23 05:45:03,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:45:03,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646582608] [2022-07-23 05:45:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:03,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:45:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:03,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:45:03,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646582608] [2022-07-23 05:45:03,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646582608] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:45:03,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691278257] [2022-07-23 05:45:03,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:45:03,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:45:03,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:45:03,711 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) [2022-07-23 05:45:03,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-23 05:45:03,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-07-23 05:45:03,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:45:03,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-23 05:45:03,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:04,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 05:45:04,431 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:45:04,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:45:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:04,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:04,604 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 [2022-07-23 05:45:04,605 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 [2022-07-23 05:45:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:04,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691278257] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:04,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:45:04,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 54 [2022-07-23 05:45:04,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982962649] [2022-07-23 05:45:04,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:04,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-23 05:45:04,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:45:04,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-23 05:45:04,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2718, Unknown=0, NotChecked=0, Total=2862 [2022-07-23 05:45:04,817 INFO L87 Difference]: Start difference. First operand 208 states and 234 transitions. Second operand has 54 states, 54 states have (on average 3.6666666666666665) internal successors, (198), 54 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:06,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:06,190 INFO L93 Difference]: Finished difference Result 361 states and 409 transitions. [2022-07-23 05:45:06,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-23 05:45:06,190 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.6666666666666665) internal successors, (198), 54 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-07-23 05:45:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:06,191 INFO L225 Difference]: With dead ends: 361 [2022-07-23 05:45:06,191 INFO L226 Difference]: Without dead ends: 215 [2022-07-23 05:45:06,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 215 SyntacticMatches, 10 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=391, Invalid=6415, Unknown=0, NotChecked=0, Total=6806 [2022-07-23 05:45:06,192 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 298 mSDsluCounter, 2149 mSDsCounter, 0 mSdLazyCounter, 3097 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 3272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:06,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 2214 Invalid, 3272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3097 Invalid, 0 Unknown, 75 Unchecked, 0.8s Time] [2022-07-23 05:45:06,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-07-23 05:45:06,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2022-07-23 05:45:06,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.127962085308057) internal successors, (238), 211 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 238 transitions. [2022-07-23 05:45:06,195 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 238 transitions. Word has length 123 [2022-07-23 05:45:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:06,195 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 238 transitions. [2022-07-23 05:45:06,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.6666666666666665) internal successors, (198), 54 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:06,196 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 238 transitions. [2022-07-23 05:45:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-23 05:45:06,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:06,196 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:06,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:06,413 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 [2022-07-23 05:45:06,414 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:45:06,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:06,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1263671422, now seen corresponding path program 22 times [2022-07-23 05:45:06,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:45:06,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895798377] [2022-07-23 05:45:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:06,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:45:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 231 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:06,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:45:06,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895798377] [2022-07-23 05:45:06,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895798377] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:45:06,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567171363] [2022-07-23 05:45:06,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:45:06,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:45:06,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:45:06,853 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) [2022-07-23 05:45:06,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-23 05:45:07,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:45:07,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:45:07,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-23 05:45:07,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 276 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:07,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:08,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 05:45:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 276 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:08,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567171363] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:08,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:45:08,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31, 31] total 62 [2022-07-23 05:45:08,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408710955] [2022-07-23 05:45:08,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:08,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-23 05:45:08,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:45:08,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-23 05:45:08,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=3508, Unknown=0, NotChecked=0, Total=3906 [2022-07-23 05:45:08,393 INFO L87 Difference]: Start difference. First operand 212 states and 238 transitions. Second operand has 63 states, 62 states have (on average 4.193548387096774) internal successors, (260), 63 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:09,840 INFO L93 Difference]: Finished difference Result 236 states and 266 transitions. [2022-07-23 05:45:09,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-23 05:45:09,841 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 4.193548387096774) internal successors, (260), 63 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have 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 [2022-07-23 05:45:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:09,841 INFO L225 Difference]: With dead ends: 236 [2022-07-23 05:45:09,842 INFO L226 Difference]: Without dead ends: 236 [2022-07-23 05:45:09,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 218 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1496, Invalid=6694, Unknown=0, NotChecked=0, Total=8190 [2022-07-23 05:45:09,843 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 1384 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 2047 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1384 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:09,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1384 Valid, 1328 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2047 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-23 05:45:09,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-23 05:45:09,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 224. [2022-07-23 05:45:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.1300448430493273) internal successors, (252), 223 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:09,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 252 transitions. [2022-07-23 05:45:09,845 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 252 transitions. Word has length 127 [2022-07-23 05:45:09,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:09,846 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 252 transitions. [2022-07-23 05:45:09,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 4.193548387096774) internal successors, (260), 63 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:09,846 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 252 transitions. [2022-07-23 05:45:09,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-23 05:45:09,846 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:09,847 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:09,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-23 05:45:10,063 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 [2022-07-23 05:45:10,063 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:45:10,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:10,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1002111298, now seen corresponding path program 23 times [2022-07-23 05:45:10,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:45:10,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622694317] [2022-07-23 05:45:10,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:10,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:45:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 53 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:10,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:45:10,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622694317] [2022-07-23 05:45:10,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622694317] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:45:10,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744347295] [2022-07-23 05:45:10,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:45:10,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:45:10,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:45:10,683 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) [2022-07-23 05:45:10,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-23 05:45:10,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-07-23 05:45:10,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:45:10,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-23 05:45:10,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:11,418 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 [2022-07-23 05:45:11,534 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:45:11,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:45:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 53 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:11,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:11,786 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 [2022-07-23 05:45:11,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-23 05:45:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 53 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:12,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744347295] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:12,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:45:12,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 57 [2022-07-23 05:45:12,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365244531] [2022-07-23 05:45:12,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:12,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-23 05:45:12,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:45:12,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-23 05:45:12,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3041, Unknown=0, NotChecked=0, Total=3192 [2022-07-23 05:45:12,047 INFO L87 Difference]: Start difference. First operand 224 states and 252 transitions. Second operand has 57 states, 57 states have (on average 3.7017543859649122) internal successors, (211), 57 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:13,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:13,599 INFO L93 Difference]: Finished difference Result 389 states and 441 transitions. [2022-07-23 05:45:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-23 05:45:13,600 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.7017543859649122) internal successors, (211), 57 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-07-23 05:45:13,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:13,600 INFO L225 Difference]: With dead ends: 389 [2022-07-23 05:45:13,600 INFO L226 Difference]: Without dead ends: 231 [2022-07-23 05:45:13,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 233 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=413, Invalid=7243, Unknown=0, NotChecked=0, Total=7656 [2022-07-23 05:45:13,601 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 323 mSDsluCounter, 2625 mSDsCounter, 0 mSdLazyCounter, 3706 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 2695 SdHoareTripleChecker+Invalid, 3928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:13,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 2695 Invalid, 3928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3706 Invalid, 0 Unknown, 113 Unchecked, 0.9s Time] [2022-07-23 05:45:13,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-23 05:45:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 228. [2022-07-23 05:45:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.1277533039647578) internal successors, (256), 227 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) [2022-07-23 05:45:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 256 transitions. [2022-07-23 05:45:13,604 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 256 transitions. Word has length 132 [2022-07-23 05:45:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:13,604 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 256 transitions. [2022-07-23 05:45:13,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.7017543859649122) internal successors, (211), 57 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 256 transitions. [2022-07-23 05:45:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-23 05:45:13,604 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:13,604 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:13,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:13,805 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 [2022-07-23 05:45:13,805 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:45:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:13,805 INFO L85 PathProgramCache]: Analyzing trace with hash 856905541, now seen corresponding path program 24 times [2022-07-23 05:45:13,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:45:13,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81396790] [2022-07-23 05:45:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:13,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:45:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 276 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:14,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:45:14,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81396790] [2022-07-23 05:45:14,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81396790] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:45:14,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427255975] [2022-07-23 05:45:14,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:45:14,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:45:14,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:45:14,240 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) [2022-07-23 05:45:14,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-23 05:45:14,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-23 05:45:14,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:45:14,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-23 05:45:14,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 325 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:15,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:16,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-23 05:45:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 378 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:17,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427255975] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:17,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:45:17,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 95 [2022-07-23 05:45:17,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501422220] [2022-07-23 05:45:17,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:17,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-07-23 05:45:17,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:45:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-07-23 05:45:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1254, Invalid=7866, Unknown=0, NotChecked=0, Total=9120 [2022-07-23 05:45:17,357 INFO L87 Difference]: Start difference. First operand 228 states and 256 transitions. Second operand has 96 states, 95 states have (on average 4.231578947368421) internal successors, (402), 96 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:18,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:18,529 INFO L93 Difference]: Finished difference Result 252 states and 284 transitions. [2022-07-23 05:45:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-23 05:45:18,530 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.231578947368421) internal successors, (402), 96 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-07-23 05:45:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:18,531 INFO L225 Difference]: With dead ends: 252 [2022-07-23 05:45:18,531 INFO L226 Difference]: Without dead ends: 252 [2022-07-23 05:45:18,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3903 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2384, Invalid=10272, Unknown=0, NotChecked=0, Total=12656 [2022-07-23 05:45:18,543 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1442 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:18,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1442 Valid, 1210 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 05:45:18,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-07-23 05:45:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 240. [2022-07-23 05:45:18,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.1297071129707112) internal successors, (270), 239 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) [2022-07-23 05:45:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 270 transitions. [2022-07-23 05:45:18,545 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 270 transitions. Word has length 136 [2022-07-23 05:45:18,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:18,546 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 270 transitions. [2022-07-23 05:45:18,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.231578947368421) internal successors, (402), 96 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:18,546 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 270 transitions. [2022-07-23 05:45:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-23 05:45:18,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:18,546 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:18,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-23 05:45:18,764 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 [2022-07-23 05:45:18,764 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:45:18,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:18,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1423707297, now seen corresponding path program 25 times [2022-07-23 05:45:18,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:45:18,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314228130] [2022-07-23 05:45:18,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:18,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:45:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 57 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:19,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:45:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314228130] [2022-07-23 05:45:19,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314228130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:45:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563081704] [2022-07-23 05:45:19,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:45:19,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:45:19,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:45:19,576 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) [2022-07-23 05:45:19,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-23 05:45:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:19,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 110 conjunts are in the unsatisfiable core [2022-07-23 05:45:19,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:20,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 05:45:20,136 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:45:20,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:45:20,202 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 [2022-07-23 05:45:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 57 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:20,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:20,300 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 [2022-07-23 05:45:20,301 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 [2022-07-23 05:45:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 57 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:20,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563081704] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:20,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:45:20,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 59 [2022-07-23 05:45:20,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663468071] [2022-07-23 05:45:20,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:20,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-23 05:45:20,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:45:20,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-23 05:45:20,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2022-07-23 05:45:20,563 INFO L87 Difference]: Start difference. First operand 240 states and 270 transitions. Second operand has 59 states, 59 states have (on average 3.76271186440678) internal successors, (222), 59 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:22,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:22,696 INFO L93 Difference]: Finished difference Result 417 states and 473 transitions. [2022-07-23 05:45:22,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-23 05:45:22,696 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.76271186440678) internal successors, (222), 59 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-07-23 05:45:22,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:22,697 INFO L225 Difference]: With dead ends: 417 [2022-07-23 05:45:22,697 INFO L226 Difference]: Without dead ends: 247 [2022-07-23 05:45:22,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=430, Invalid=7942, Unknown=0, NotChecked=0, Total=8372 [2022-07-23 05:45:22,698 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 525 mSDsluCounter, 2804 mSDsCounter, 0 mSdLazyCounter, 3910 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 2879 SdHoareTripleChecker+Invalid, 4249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 3910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:22,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 2879 Invalid, 4249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 3910 Invalid, 0 Unknown, 163 Unchecked, 1.2s Time] [2022-07-23 05:45:22,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-23 05:45:22,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 244. [2022-07-23 05:45:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.1275720164609053) internal successors, (274), 243 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 274 transitions. [2022-07-23 05:45:22,701 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 274 transitions. Word has length 141 [2022-07-23 05:45:22,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:22,701 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 274 transitions. [2022-07-23 05:45:22,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.76271186440678) internal successors, (222), 59 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 274 transitions. [2022-07-23 05:45:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-23 05:45:22,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:22,702 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:22,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:22,902 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 [2022-07-23 05:45:22,903 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:45:22,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:22,903 INFO L85 PathProgramCache]: Analyzing trace with hash -5721924, now seen corresponding path program 26 times [2022-07-23 05:45:22,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:45:22,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441519361] [2022-07-23 05:45:22,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:22,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:45:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 325 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:23,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:45:23,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441519361] [2022-07-23 05:45:23,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441519361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:45:23,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608909334] [2022-07-23 05:45:23,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:45:23,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:45:23,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:45:23,473 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) [2022-07-23 05:45:23,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-23 05:45:23,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:45:23,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:45:23,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-23 05:45:23,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:23,633 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 [2022-07-23 05:45:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 378 proven. 597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:24,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 435 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:25,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608909334] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:25,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:45:25,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 98 [2022-07-23 05:45:25,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708651605] [2022-07-23 05:45:25,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:25,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-23 05:45:25,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:45:25,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-23 05:45:25,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1060, Invalid=8642, Unknown=0, NotChecked=0, Total=9702 [2022-07-23 05:45:25,913 INFO L87 Difference]: Start difference. First operand 244 states and 274 transitions. Second operand has 99 states, 98 states have (on average 4.326530612244898) internal successors, (424), 99 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:27,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:27,534 INFO L93 Difference]: Finished difference Result 268 states and 302 transitions. [2022-07-23 05:45:27,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-23 05:45:27,534 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 4.326530612244898) internal successors, (424), 99 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2022-07-23 05:45:27,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:27,535 INFO L225 Difference]: With dead ends: 268 [2022-07-23 05:45:27,535 INFO L226 Difference]: Without dead ends: 268 [2022-07-23 05:45:27,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4002 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2859, Invalid=14171, Unknown=0, NotChecked=0, Total=17030 [2022-07-23 05:45:27,537 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1638 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 2947 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1638 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:27,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1638 Valid, 1991 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2947 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-23 05:45:27,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-23 05:45:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 256. [2022-07-23 05:45:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.1294117647058823) internal successors, (288), 255 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:27,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 288 transitions. [2022-07-23 05:45:27,540 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 288 transitions. Word has length 145 [2022-07-23 05:45:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:27,540 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 288 transitions. [2022-07-23 05:45:27,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 4.326530612244898) internal successors, (424), 99 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:27,540 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 288 transitions. [2022-07-23 05:45:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-23 05:45:27,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:27,541 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:27,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:27,755 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 [2022-07-23 05:45:27,756 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:45:27,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash 504294472, now seen corresponding path program 27 times [2022-07-23 05:45:27,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:45:27,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092223325] [2022-07-23 05:45:27,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:27,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:45:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 61 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:28,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:45:28,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092223325] [2022-07-23 05:45:28,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092223325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:45:28,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555264738] [2022-07-23 05:45:28,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:45:28,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:45:28,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:45:28,535 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) [2022-07-23 05:45:28,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-23 05:45:28,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-07-23 05:45:28,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:45:28,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 116 conjunts are in the unsatisfiable core [2022-07-23 05:45:28,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:29,485 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 [2022-07-23 05:45:29,613 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:45:29,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:45:29,696 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 [2022-07-23 05:45:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 61 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:29,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:29,818 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 [2022-07-23 05:45:29,827 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 [2022-07-23 05:45:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 61 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:30,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555264738] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:30,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:45:30,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 38] total 64 [2022-07-23 05:45:30,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189939879] [2022-07-23 05:45:30,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:30,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-23 05:45:30,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:45:30,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-23 05:45:30,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3865, Unknown=0, NotChecked=0, Total=4032 [2022-07-23 05:45:30,279 INFO L87 Difference]: Start difference. First operand 256 states and 288 transitions. Second operand has 64 states, 64 states have (on average 3.671875) internal successors, (235), 64 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:32,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:32,417 INFO L93 Difference]: Finished difference Result 445 states and 505 transitions. [2022-07-23 05:45:32,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-23 05:45:32,417 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.671875) internal successors, (235), 64 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-07-23 05:45:32,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:32,418 INFO L225 Difference]: With dead ends: 445 [2022-07-23 05:45:32,418 INFO L226 Difference]: Without dead ends: 263 [2022-07-23 05:45:32,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 266 SyntacticMatches, 11 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=462, Invalid=9240, Unknown=0, NotChecked=0, Total=9702 [2022-07-23 05:45:32,419 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 280 mSDsluCounter, 3517 mSDsCounter, 0 mSdLazyCounter, 5098 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 5272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 5098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:32,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 3597 Invalid, 5272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 5098 Invalid, 0 Unknown, 78 Unchecked, 1.2s Time] [2022-07-23 05:45:32,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-23 05:45:32,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 260. [2022-07-23 05:45:32,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.1274131274131274) internal successors, (292), 259 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) [2022-07-23 05:45:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 292 transitions. [2022-07-23 05:45:32,422 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 292 transitions. Word has length 150 [2022-07-23 05:45:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:32,422 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 292 transitions. [2022-07-23 05:45:32,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.671875) internal successors, (235), 64 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 292 transitions. [2022-07-23 05:45:32,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-23 05:45:32,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:32,423 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:32,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:32,642 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 [2022-07-23 05:45:32,642 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:45:32,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:32,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1791170677, now seen corresponding path program 28 times [2022-07-23 05:45:32,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:45:32,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436416395] [2022-07-23 05:45:32,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:32,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:45:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 378 proven. 734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:33,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:45:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436416395] [2022-07-23 05:45:33,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436416395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:45:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258246804] [2022-07-23 05:45:33,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:45:33,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:45:33,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:45:33,215 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) [2022-07-23 05:45:33,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-23 05:45:33,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:45:33,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:45:33,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-23 05:45:33,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 435 proven. 677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:34,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:34,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-07-23 05:45:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 435 proven. 677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:35,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258246804] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:35,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:45:35,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 89 [2022-07-23 05:45:35,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116000290] [2022-07-23 05:45:35,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:35,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-23 05:45:35,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:45:35,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-23 05:45:35,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=7175, Unknown=0, NotChecked=0, Total=8010 [2022-07-23 05:45:35,380 INFO L87 Difference]: Start difference. First operand 260 states and 292 transitions. Second operand has 90 states, 89 states have (on average 4.269662921348314) internal successors, (380), 90 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:37,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:37,647 INFO L93 Difference]: Finished difference Result 284 states and 320 transitions. [2022-07-23 05:45:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-23 05:45:37,647 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 4.269662921348314) internal successors, (380), 90 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2022-07-23 05:45:37,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:37,649 INFO L225 Difference]: With dead ends: 284 [2022-07-23 05:45:37,649 INFO L226 Difference]: Without dead ends: 284 [2022-07-23 05:45:37,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2630 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2878, Invalid=12374, Unknown=0, NotChecked=0, Total=15252 [2022-07-23 05:45:37,651 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 1570 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 2872 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 1829 SdHoareTripleChecker+Invalid, 3060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:37,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1570 Valid, 1829 Invalid, 3060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2872 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-23 05:45:37,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-07-23 05:45:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 272. [2022-07-23 05:45:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.1291512915129152) internal successors, (306), 271 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:37,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 306 transitions. [2022-07-23 05:45:37,669 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 306 transitions. Word has length 154 [2022-07-23 05:45:37,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:37,669 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 306 transitions. [2022-07-23 05:45:37,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 4.269662921348314) internal successors, (380), 90 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:37,669 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 306 transitions. [2022-07-23 05:45:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-23 05:45:37,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:37,670 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:37,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:37,887 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 [2022-07-23 05:45:37,888 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:45:37,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1810341593, now seen corresponding path program 29 times [2022-07-23 05:45:37,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:45:37,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346144606] [2022-07-23 05:45:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:37,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:45:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 65 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:38,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:45:38,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346144606] [2022-07-23 05:45:38,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346144606] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:45:38,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53172258] [2022-07-23 05:45:38,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:45:38,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:45:38,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:45:38,557 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) [2022-07-23 05:45:38,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-23 05:45:39,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-07-23 05:45:39,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:45:39,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 122 conjunts are in the unsatisfiable core [2022-07-23 05:45:39,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:39,744 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 [2022-07-23 05:45:39,874 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:45:39,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:45:39,981 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 [2022-07-23 05:45:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 65 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:39,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:40,142 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 [2022-07-23 05:45:40,143 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 [2022-07-23 05:45:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 65 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:40,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53172258] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:40,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:45:40,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 65 [2022-07-23 05:45:40,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854833855] [2022-07-23 05:45:40,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:40,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-23 05:45:40,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:45:40,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-23 05:45:40,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3992, Unknown=0, NotChecked=0, Total=4160 [2022-07-23 05:45:40,523 INFO L87 Difference]: Start difference. First operand 272 states and 306 transitions. Second operand has 65 states, 65 states have (on average 3.8153846153846156) internal successors, (248), 65 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) [2022-07-23 05:45:43,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:43,691 INFO L93 Difference]: Finished difference Result 560 states and 637 transitions. [2022-07-23 05:45:43,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-23 05:45:43,691 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.8153846153846156) internal successors, (248), 65 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 159 [2022-07-23 05:45:43,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:43,719 INFO L225 Difference]: With dead ends: 560 [2022-07-23 05:45:43,719 INFO L226 Difference]: Without dead ends: 279 [2022-07-23 05:45:43,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 283 SyntacticMatches, 11 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=719, Invalid=13087, Unknown=0, NotChecked=0, Total=13806 [2022-07-23 05:45:43,720 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1028 mSDsluCounter, 3926 mSDsCounter, 0 mSdLazyCounter, 5506 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 4011 SdHoareTripleChecker+Invalid, 6145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 5506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:43,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1028 Valid, 4011 Invalid, 6145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 5506 Invalid, 0 Unknown, 269 Unchecked, 1.6s Time] [2022-07-23 05:45:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-23 05:45:43,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 276. [2022-07-23 05:45:43,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.1272727272727272) internal successors, (310), 275 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:43,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 310 transitions. [2022-07-23 05:45:43,723 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 310 transitions. Word has length 159 [2022-07-23 05:45:43,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:43,724 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 310 transitions. [2022-07-23 05:45:43,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.8153846153846156) internal successors, (248), 65 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) [2022-07-23 05:45:43,724 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 310 transitions. [2022-07-23 05:45:43,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-23 05:45:43,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:43,725 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:43,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:43,925 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 [2022-07-23 05:45:43,925 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:45:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:43,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1468227850, now seen corresponding path program 30 times [2022-07-23 05:45:43,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:45:43,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891218049] [2022-07-23 05:45:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:43,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:45:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 435 proven. 823 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:44,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:45:44,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891218049] [2022-07-23 05:45:44,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891218049] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:45:44,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236914388] [2022-07-23 05:45:44,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:45:44,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:45:44,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:45:44,629 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) [2022-07-23 05:45:44,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-23 05:45:45,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-23 05:45:45,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:45:45,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-23 05:45:45,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:45,648 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 [2022-07-23 05:45:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 496 proven. 762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:47,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 561 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:49,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236914388] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:49,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:45:49,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 112 [2022-07-23 05:45:49,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510022631] [2022-07-23 05:45:49,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:49,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-07-23 05:45:49,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:45:49,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-07-23 05:45:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1785, Invalid=10871, Unknown=0, NotChecked=0, Total=12656 [2022-07-23 05:45:49,065 INFO L87 Difference]: Start difference. First operand 276 states and 310 transitions. Second operand has 113 states, 112 states have (on average 4.3125) internal successors, (483), 113 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:50,516 INFO L93 Difference]: Finished difference Result 300 states and 338 transitions. [2022-07-23 05:45:50,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-23 05:45:50,516 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 4.3125) internal successors, (483), 113 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-07-23 05:45:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:50,517 INFO L225 Difference]: With dead ends: 300 [2022-07-23 05:45:50,517 INFO L226 Difference]: Without dead ends: 300 [2022-07-23 05:45:50,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5482 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3336, Invalid=14220, Unknown=0, NotChecked=0, Total=17556 [2022-07-23 05:45:50,519 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 1581 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1581 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:50,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1581 Valid, 1527 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2193 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-23 05:45:50,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-07-23 05:45:50,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 288. [2022-07-23 05:45:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.1289198606271778) internal successors, (324), 287 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 324 transitions. [2022-07-23 05:45:50,523 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 324 transitions. Word has length 163 [2022-07-23 05:45:50,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:50,523 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 324 transitions. [2022-07-23 05:45:50,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 4.3125) internal successors, (483), 113 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 324 transitions. [2022-07-23 05:45:50,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-23 05:45:50,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:50,524 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:50,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-23 05:45:50,743 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 [2022-07-23 05:45:50,743 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:45:50,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:50,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2055679410, now seen corresponding path program 31 times [2022-07-23 05:45:50,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:45:50,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446868876] [2022-07-23 05:45:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:50,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:45:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 69 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:51,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:45:51,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446868876] [2022-07-23 05:45:51,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446868876] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:45:51,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473411527] [2022-07-23 05:45:51,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:45:51,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:45:51,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:45:51,571 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) [2022-07-23 05:45:51,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-23 05:45:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:51,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 128 conjunts are in the unsatisfiable core [2022-07-23 05:45:51,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:52,486 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 [2022-07-23 05:45:52,624 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:45:52,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:45:52,745 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 [2022-07-23 05:45:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 69 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:52,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:45:52,924 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 [2022-07-23 05:45:52,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-23 05:45:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 69 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:53,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473411527] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:45:53,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:45:53,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 68 [2022-07-23 05:45:53,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77774573] [2022-07-23 05:45:53,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:45:53,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-23 05:45:53,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:45:53,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-23 05:45:53,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4381, Unknown=0, NotChecked=0, Total=4556 [2022-07-23 05:45:53,426 INFO L87 Difference]: Start difference. First operand 288 states and 324 transitions. Second operand has 68 states, 68 states have (on average 3.838235294117647) internal successors, (261), 68 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:57,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:45:57,109 INFO L93 Difference]: Finished difference Result 594 states and 676 transitions. [2022-07-23 05:45:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-23 05:45:57,109 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.838235294117647) internal successors, (261), 68 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2022-07-23 05:45:57,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:45:57,110 INFO L225 Difference]: With dead ends: 594 [2022-07-23 05:45:57,110 INFO L226 Difference]: Without dead ends: 295 [2022-07-23 05:45:57,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 299 SyntacticMatches, 12 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=756, Invalid=14496, Unknown=0, NotChecked=0, Total=15252 [2022-07-23 05:45:57,112 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 1095 mSDsluCounter, 3837 mSDsCounter, 0 mSdLazyCounter, 5372 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 3927 SdHoareTripleChecker+Invalid, 5950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 5372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:45:57,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1095 Valid, 3927 Invalid, 5950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 5372 Invalid, 0 Unknown, 184 Unchecked, 1.8s Time] [2022-07-23 05:45:57,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-23 05:45:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2022-07-23 05:45:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.127147766323024) internal successors, (328), 291 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 328 transitions. [2022-07-23 05:45:57,115 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 328 transitions. Word has length 168 [2022-07-23 05:45:57,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:45:57,115 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 328 transitions. [2022-07-23 05:45:57,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.838235294117647) internal successors, (261), 68 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:45:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 328 transitions. [2022-07-23 05:45:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-23 05:45:57,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:45:57,116 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:45:57,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-07-23 05:45:57,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-23 05:45:57,333 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:45:57,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:45:57,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1289069265, now seen corresponding path program 32 times [2022-07-23 05:45:57,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:45:57,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962305374] [2022-07-23 05:45:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:45:57,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:45:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:45:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 496 proven. 917 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:58,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:45:58,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962305374] [2022-07-23 05:45:58,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962305374] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:45:58,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491036637] [2022-07-23 05:45:58,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:45:58,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:45:58,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:45:58,201 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:45:58,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-23 05:45:58,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:45:58,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:45:58,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 105 conjunts are in the unsatisfiable core [2022-07-23 05:45:58,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:45:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 561 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:45:59,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:00,183 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 [2022-07-23 05:46:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 561 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:00,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491036637] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:00,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:46:00,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 83 [2022-07-23 05:46:00,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545116814] [2022-07-23 05:46:00,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:00,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-23 05:46:00,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:46:00,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-23 05:46:00,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=849, Invalid=6123, Unknown=0, NotChecked=0, Total=6972 [2022-07-23 05:46:00,275 INFO L87 Difference]: Start difference. First operand 292 states and 328 transitions. Second operand has 84 states, 83 states have (on average 4.216867469879518) internal successors, (350), 84 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:02,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:02,076 INFO L93 Difference]: Finished difference Result 316 states and 356 transitions. [2022-07-23 05:46:02,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-23 05:46:02,076 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 4.216867469879518) internal successors, (350), 84 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2022-07-23 05:46:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:02,077 INFO L225 Difference]: With dead ends: 316 [2022-07-23 05:46:02,077 INFO L226 Difference]: Without dead ends: 316 [2022-07-23 05:46:02,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 298 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2886 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1983, Invalid=8937, Unknown=0, NotChecked=0, Total=10920 [2022-07-23 05:46:02,078 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 1378 mSDsluCounter, 2270 mSDsCounter, 0 mSdLazyCounter, 3564 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 2368 SdHoareTripleChecker+Invalid, 3706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 3564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:02,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 2368 Invalid, 3706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 3564 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-23 05:46:02,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-07-23 05:46:02,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 304. [2022-07-23 05:46:02,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.1287128712871286) internal successors, (342), 303 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 342 transitions. [2022-07-23 05:46:02,080 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 342 transitions. Word has length 172 [2022-07-23 05:46:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:02,080 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 342 transitions. [2022-07-23 05:46:02,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 4.216867469879518) internal successors, (350), 84 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 342 transitions. [2022-07-23 05:46:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-07-23 05:46:02,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:02,081 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:02,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:02,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:46:02,301 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:46:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:02,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1157562195, now seen corresponding path program 33 times [2022-07-23 05:46:02,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:46:02,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467326583] [2022-07-23 05:46:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:02,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:46:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 73 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:03,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:46:03,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467326583] [2022-07-23 05:46:03,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467326583] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:46:03,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488753651] [2022-07-23 05:46:03,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:46:03,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:46:03,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:46:03,190 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:46:03,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-23 05:46:04,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-07-23 05:46:04,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:46:04,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 136 conjunts are in the unsatisfiable core [2022-07-23 05:46:04,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:04,890 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 [2022-07-23 05:46:05,036 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:46:05,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:46:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 73 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:05,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:05,391 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 [2022-07-23 05:46:05,393 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 [2022-07-23 05:46:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 73 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:05,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488753651] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:05,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:46:05,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 72 [2022-07-23 05:46:05,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484813255] [2022-07-23 05:46:05,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:05,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-23 05:46:05,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:46:05,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-23 05:46:05,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=4926, Unknown=0, NotChecked=0, Total=5112 [2022-07-23 05:46:05,783 INFO L87 Difference]: Start difference. First operand 304 states and 342 transitions. Second operand has 72 states, 72 states have (on average 3.8333333333333335) internal successors, (276), 72 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:09,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:09,140 INFO L93 Difference]: Finished difference Result 628 states and 715 transitions. [2022-07-23 05:46:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-23 05:46:09,140 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.8333333333333335) internal successors, (276), 72 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2022-07-23 05:46:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:09,141 INFO L225 Difference]: With dead ends: 628 [2022-07-23 05:46:09,141 INFO L226 Difference]: Without dead ends: 311 [2022-07-23 05:46:09,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 317 SyntacticMatches, 10 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=799, Invalid=16231, Unknown=0, NotChecked=0, Total=17030 [2022-07-23 05:46:09,144 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 873 mSDsluCounter, 5083 mSDsCounter, 0 mSdLazyCounter, 7453 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 5178 SdHoareTripleChecker+Invalid, 7753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 7453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:09,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 5178 Invalid, 7753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 7453 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-23 05:46:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-07-23 05:46:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 308. [2022-07-23 05:46:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.1270358306188926) internal successors, (346), 307 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 346 transitions. [2022-07-23 05:46:09,169 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 346 transitions. Word has length 177 [2022-07-23 05:46:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:09,170 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 346 transitions. [2022-07-23 05:46:09,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.8333333333333335) internal successors, (276), 72 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 346 transitions. [2022-07-23 05:46:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-07-23 05:46:09,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:09,171 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:09,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:09,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-23 05:46:09,391 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:46:09,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:09,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1298066896, now seen corresponding path program 34 times [2022-07-23 05:46:09,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:46:09,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364743837] [2022-07-23 05:46:09,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:09,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:46:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 561 proven. 1016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:10,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:46:10,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364743837] [2022-07-23 05:46:10,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364743837] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:46:10,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770533434] [2022-07-23 05:46:10,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:46:10,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:46:10,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:46:10,146 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:46:10,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-23 05:46:10,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:46:10,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:46:10,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 114 conjunts are in the unsatisfiable core [2022-07-23 05:46:10,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 630 proven. 947 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:11,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:12,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-07-23 05:46:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 630 proven. 947 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:13,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770533434] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:13,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:46:13,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 104 [2022-07-23 05:46:13,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594652579] [2022-07-23 05:46:13,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:13,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-07-23 05:46:13,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:46:13,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-07-23 05:46:13,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1129, Invalid=9791, Unknown=0, NotChecked=0, Total=10920 [2022-07-23 05:46:13,410 INFO L87 Difference]: Start difference. First operand 308 states and 346 transitions. Second operand has 105 states, 104 states have (on average 4.288461538461538) internal successors, (446), 105 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:16,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:16,558 INFO L93 Difference]: Finished difference Result 332 states and 374 transitions. [2022-07-23 05:46:16,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-23 05:46:16,558 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 4.288461538461538) internal successors, (446), 105 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-07-23 05:46:16,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:16,559 INFO L225 Difference]: With dead ends: 332 [2022-07-23 05:46:16,559 INFO L226 Difference]: Without dead ends: 332 [2022-07-23 05:46:16,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3665 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3922, Invalid=16958, Unknown=0, NotChecked=0, Total=20880 [2022-07-23 05:46:16,561 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 2327 mSDsluCounter, 2497 mSDsCounter, 0 mSdLazyCounter, 3999 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2327 SdHoareTripleChecker+Valid, 2600 SdHoareTripleChecker+Invalid, 4278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 3999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:16,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2327 Valid, 2600 Invalid, 4278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 3999 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-23 05:46:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-07-23 05:46:16,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 320. [2022-07-23 05:46:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.128526645768025) internal successors, (360), 319 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:16,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 360 transitions. [2022-07-23 05:46:16,564 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 360 transitions. Word has length 181 [2022-07-23 05:46:16,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:16,564 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 360 transitions. [2022-07-23 05:46:16,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 4.288461538461538) internal successors, (446), 105 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:16,564 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 360 transitions. [2022-07-23 05:46:16,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-07-23 05:46:16,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:16,565 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:16,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:16,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:46:16,784 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:46:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:16,784 INFO L85 PathProgramCache]: Analyzing trace with hash -769830060, now seen corresponding path program 35 times [2022-07-23 05:46:16,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:46:16,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832454166] [2022-07-23 05:46:16,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:16,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:46:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 77 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:17,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:46:17,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832454166] [2022-07-23 05:46:17,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832454166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:46:17,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98474231] [2022-07-23 05:46:17,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:46:17,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:46:17,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:46:17,757 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:46:17,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-23 05:46:18,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-07-23 05:46:18,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:46:18,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 138 conjunts are in the unsatisfiable core [2022-07-23 05:46:18,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:19,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 05:46:19,227 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:46:19,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:46:19,315 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 [2022-07-23 05:46:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 77 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:19,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:19,443 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 [2022-07-23 05:46:19,444 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 [2022-07-23 05:46:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 77 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:19,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98474231] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:19,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:46:19,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 74 [2022-07-23 05:46:19,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727088077] [2022-07-23 05:46:19,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:19,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-23 05:46:19,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:46:19,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-23 05:46:19,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=5213, Unknown=0, NotChecked=0, Total=5402 [2022-07-23 05:46:19,801 INFO L87 Difference]: Start difference. First operand 320 states and 360 transitions. Second operand has 74 states, 74 states have (on average 3.8783783783783785) internal successors, (287), 74 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:23,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:23,388 INFO L93 Difference]: Finished difference Result 662 states and 754 transitions. [2022-07-23 05:46:23,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-23 05:46:23,388 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.8783783783783785) internal successors, (287), 74 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have 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 [2022-07-23 05:46:23,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:23,389 INFO L225 Difference]: With dead ends: 662 [2022-07-23 05:46:23,389 INFO L226 Difference]: Without dead ends: 327 [2022-07-23 05:46:23,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 333 SyntacticMatches, 12 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2736 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=830, Invalid=17530, Unknown=0, NotChecked=0, Total=18360 [2022-07-23 05:46:23,391 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 709 mSDsluCounter, 5015 mSDsCounter, 0 mSdLazyCounter, 7208 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 5115 SdHoareTripleChecker+Invalid, 7582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 7208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:23,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 5115 Invalid, 7582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 7208 Invalid, 0 Unknown, 132 Unchecked, 1.8s Time] [2022-07-23 05:46:23,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-23 05:46:23,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 324. [2022-07-23 05:46:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.1269349845201238) internal successors, (364), 323 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 364 transitions. [2022-07-23 05:46:23,394 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 364 transitions. Word has length 186 [2022-07-23 05:46:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:23,394 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 364 transitions. [2022-07-23 05:46:23,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.8783783783783785) internal successors, (287), 74 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:23,394 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 364 transitions. [2022-07-23 05:46:23,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-07-23 05:46:23,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:23,395 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:23,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:23,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-23 05:46:23,614 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:46:23,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:23,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1474942697, now seen corresponding path program 36 times [2022-07-23 05:46:23,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:46:23,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530409591] [2022-07-23 05:46:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:23,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:46:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 630 proven. 1120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:24,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:46:24,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530409591] [2022-07-23 05:46:24,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530409591] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:46:24,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942754993] [2022-07-23 05:46:24,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:46:24,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:46:24,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:46:24,373 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:46:24,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-23 05:46:25,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-07-23 05:46:25,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:46:25,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-23 05:46:25,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:25,336 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 [2022-07-23 05:46:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 703 proven. 1047 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:26,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 780 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:28,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942754993] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:28,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:46:28,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 130 [2022-07-23 05:46:28,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225856320] [2022-07-23 05:46:28,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:28,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-07-23 05:46:28,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:46:28,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-07-23 05:46:28,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2394, Invalid=14636, Unknown=0, NotChecked=0, Total=17030 [2022-07-23 05:46:28,425 INFO L87 Difference]: Start difference. First operand 324 states and 364 transitions. Second operand has 131 states, 130 states have (on average 4.338461538461538) internal successors, (564), 131 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:29,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:29,691 INFO L93 Difference]: Finished difference Result 348 states and 392 transitions. [2022-07-23 05:46:29,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-23 05:46:29,692 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 4.338461538461538) internal successors, (564), 131 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2022-07-23 05:46:29,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:29,693 INFO L225 Difference]: With dead ends: 348 [2022-07-23 05:46:29,693 INFO L226 Difference]: Without dead ends: 348 [2022-07-23 05:46:29,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7501 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4455, Invalid=19107, Unknown=0, NotChecked=0, Total=23562 [2022-07-23 05:46:29,694 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 1947 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1947 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:29,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1947 Valid, 1804 Invalid, 2731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 05:46:29,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-23 05:46:29,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 336. [2022-07-23 05:46:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.128358208955224) internal successors, (378), 335 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 378 transitions. [2022-07-23 05:46:29,697 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 378 transitions. Word has length 190 [2022-07-23 05:46:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:29,697 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 378 transitions. [2022-07-23 05:46:29,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 4.338461538461538) internal successors, (564), 131 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:29,698 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 378 transitions. [2022-07-23 05:46:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-23 05:46:29,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:29,698 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:29,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-23 05:46:29,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:46:29,913 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:46:29,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:29,913 INFO L85 PathProgramCache]: Analyzing trace with hash 311784653, now seen corresponding path program 37 times [2022-07-23 05:46:29,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:46:29,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196908006] [2022-07-23 05:46:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:29,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:46:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 81 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:31,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:46:31,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196908006] [2022-07-23 05:46:31,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196908006] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:46:31,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850747463] [2022-07-23 05:46:31,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:46:31,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:46:31,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:46:31,004 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:46:31,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-23 05:46:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:31,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 146 conjunts are in the unsatisfiable core [2022-07-23 05:46:31,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:32,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 05:46:32,273 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:46:32,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:46:32,361 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 [2022-07-23 05:46:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 81 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:32,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:32,575 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 [2022-07-23 05:46:32,576 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 [2022-07-23 05:46:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 81 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:33,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850747463] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:33,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:46:33,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 77 [2022-07-23 05:46:33,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722087165] [2022-07-23 05:46:33,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:33,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-23 05:46:33,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:46:33,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-23 05:46:33,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=5656, Unknown=0, NotChecked=0, Total=5852 [2022-07-23 05:46:33,206 INFO L87 Difference]: Start difference. First operand 336 states and 378 transitions. Second operand has 77 states, 77 states have (on average 3.896103896103896) internal successors, (300), 77 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:37,161 INFO L93 Difference]: Finished difference Result 696 states and 793 transitions. [2022-07-23 05:46:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-07-23 05:46:37,162 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.896103896103896) internal successors, (300), 77 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-07-23 05:46:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:37,163 INFO L225 Difference]: With dead ends: 696 [2022-07-23 05:46:37,163 INFO L226 Difference]: Without dead ends: 343 [2022-07-23 05:46:37,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 349 SyntacticMatches, 13 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3000 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=867, Invalid=19155, Unknown=0, NotChecked=0, Total=20022 [2022-07-23 05:46:37,165 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 862 mSDsluCounter, 5459 mSDsCounter, 0 mSdLazyCounter, 7687 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 5564 SdHoareTripleChecker+Invalid, 8305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 7687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:37,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 5564 Invalid, 8305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 7687 Invalid, 0 Unknown, 306 Unchecked, 1.9s Time] [2022-07-23 05:46:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-23 05:46:37,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 340. [2022-07-23 05:46:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.126843657817109) internal successors, (382), 339 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) [2022-07-23 05:46:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 382 transitions. [2022-07-23 05:46:37,168 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 382 transitions. Word has length 195 [2022-07-23 05:46:37,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:37,168 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 382 transitions. [2022-07-23 05:46:37,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.896103896103896) internal successors, (300), 77 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:37,168 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 382 transitions. [2022-07-23 05:46:37,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-23 05:46:37,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:37,169 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:37,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:37,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:46:37,384 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:46:37,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:37,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1565693334, now seen corresponding path program 38 times [2022-07-23 05:46:37,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:46:37,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374582555] [2022-07-23 05:46:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:37,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:46:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 703 proven. 1229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:38,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:46:38,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374582555] [2022-07-23 05:46:38,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374582555] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:46:38,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178419573] [2022-07-23 05:46:38,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:46:38,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:46:38,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:46:38,280 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:46:38,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-23 05:46:38,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:46:38,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:46:38,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-23 05:46:38,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 780 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:39,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:40,937 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 [2022-07-23 05:46:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 780 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:41,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178419573] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:41,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:46:41,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 47, 47] total 94 [2022-07-23 05:46:41,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844851904] [2022-07-23 05:46:41,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:41,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-23 05:46:41,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:46:41,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-23 05:46:41,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=8056, Unknown=0, NotChecked=0, Total=8930 [2022-07-23 05:46:41,037 INFO L87 Difference]: Start difference. First operand 340 states and 382 transitions. Second operand has 95 states, 94 states have (on average 4.297872340425532) internal successors, (404), 95 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:43,749 INFO L93 Difference]: Finished difference Result 364 states and 410 transitions. [2022-07-23 05:46:43,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-23 05:46:43,749 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 4.297872340425532) internal successors, (404), 95 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-07-23 05:46:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:43,750 INFO L225 Difference]: With dead ends: 364 [2022-07-23 05:46:43,750 INFO L226 Difference]: Without dead ends: 364 [2022-07-23 05:46:43,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 346 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3076 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3476, Invalid=15706, Unknown=0, NotChecked=0, Total=19182 [2022-07-23 05:46:43,751 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 2396 mSDsluCounter, 2942 mSDsCounter, 0 mSdLazyCounter, 4639 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2396 SdHoareTripleChecker+Valid, 3055 SdHoareTripleChecker+Invalid, 4900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 4639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:43,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2396 Valid, 3055 Invalid, 4900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 4639 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-23 05:46:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-07-23 05:46:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 352. [2022-07-23 05:46:43,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.1282051282051282) internal successors, (396), 351 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 396 transitions. [2022-07-23 05:46:43,754 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 396 transitions. Word has length 199 [2022-07-23 05:46:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:43,754 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 396 transitions. [2022-07-23 05:46:43,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 4.297872340425532) internal successors, (404), 95 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 396 transitions. [2022-07-23 05:46:43,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-07-23 05:46:43,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:43,755 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:43,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:43,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-23 05:46:43,968 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:46:43,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:43,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1761538214, now seen corresponding path program 39 times [2022-07-23 05:46:43,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:46:43,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915798854] [2022-07-23 05:46:43,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:43,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:46:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2038 backedges. 85 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:45,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:46:45,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915798854] [2022-07-23 05:46:45,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915798854] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:46:45,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739345057] [2022-07-23 05:46:45,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:46:45,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:46:45,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:46:45,191 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:46:45,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-23 05:46:46,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-07-23 05:46:46,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:46:46,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 152 conjunts are in the unsatisfiable core [2022-07-23 05:46:46,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:47,706 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 [2022-07-23 05:46:47,830 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:46:47,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:46:47,950 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 [2022-07-23 05:46:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2038 backedges. 85 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:47,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:48,120 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 [2022-07-23 05:46:48,122 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 [2022-07-23 05:46:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2038 backedges. 85 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:48,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739345057] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:48,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:46:48,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 80 [2022-07-23 05:46:48,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042864908] [2022-07-23 05:46:48,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:48,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-23 05:46:48,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:46:48,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-23 05:46:48,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=6117, Unknown=0, NotChecked=0, Total=6320 [2022-07-23 05:46:48,692 INFO L87 Difference]: Start difference. First operand 352 states and 396 transitions. Second operand has 80 states, 80 states have (on average 3.9125) internal successors, (313), 80 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:53,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:53,606 INFO L93 Difference]: Finished difference Result 730 states and 832 transitions. [2022-07-23 05:46:53,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-23 05:46:53,607 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.9125) internal successors, (313), 80 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2022-07-23 05:46:53,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:53,607 INFO L225 Difference]: With dead ends: 730 [2022-07-23 05:46:53,607 INFO L226 Difference]: Without dead ends: 359 [2022-07-23 05:46:53,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 366 SyntacticMatches, 13 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3247 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=904, Invalid=20852, Unknown=0, NotChecked=0, Total=21756 [2022-07-23 05:46:53,609 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 906 mSDsluCounter, 6564 mSDsCounter, 0 mSdLazyCounter, 9525 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 6674 SdHoareTripleChecker+Invalid, 9853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 9525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:53,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 6674 Invalid, 9853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 9525 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-23 05:46:53,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-07-23 05:46:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 356. [2022-07-23 05:46:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.1267605633802817) internal successors, (400), 355 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:53,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 400 transitions. [2022-07-23 05:46:53,611 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 400 transitions. Word has length 204 [2022-07-23 05:46:53,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:53,612 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 400 transitions. [2022-07-23 05:46:53,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.9125) internal successors, (313), 80 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:53,612 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 400 transitions. [2022-07-23 05:46:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-07-23 05:46:53,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:53,612 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:53,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:53,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-23 05:46:53,830 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:46:53,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:53,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1259805277, now seen corresponding path program 40 times [2022-07-23 05:46:53,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:46:53,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539992531] [2022-07-23 05:46:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:53,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:46:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 780 proven. 1343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:54,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:46:54,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539992531] [2022-07-23 05:46:54,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539992531] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:46:54,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039871731] [2022-07-23 05:46:54,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:46:54,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:46:54,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:46:54,898 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:46:54,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-23 05:46:55,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:46:55,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:46:55,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 125 conjunts are in the unsatisfiable core [2022-07-23 05:46:55,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 861 proven. 1262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:56,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:57,772 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 [2022-07-23 05:46:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 861 proven. 1262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:57,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039871731] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:57,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:46:57,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 99 [2022-07-23 05:46:57,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435649311] [2022-07-23 05:46:57,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:57,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-07-23 05:46:57,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:46:57,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-07-23 05:46:57,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=8695, Unknown=0, NotChecked=0, Total=9900 [2022-07-23 05:46:57,875 INFO L87 Difference]: Start difference. First operand 356 states and 400 transitions. Second operand has 100 states, 99 states have (on average 4.262626262626263) internal successors, (422), 100 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:59,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:59,698 INFO L93 Difference]: Finished difference Result 380 states and 428 transitions. [2022-07-23 05:46:59,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-23 05:46:59,698 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 4.262626262626263) internal successors, (422), 100 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2022-07-23 05:46:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:59,699 INFO L225 Difference]: With dead ends: 380 [2022-07-23 05:46:59,699 INFO L226 Difference]: Without dead ends: 380 [2022-07-23 05:46:59,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 362 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4142 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2805, Invalid=12695, Unknown=0, NotChecked=0, Total=15500 [2022-07-23 05:46:59,700 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1901 mSDsluCounter, 3027 mSDsCounter, 0 mSdLazyCounter, 4685 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1901 SdHoareTripleChecker+Valid, 3145 SdHoareTripleChecker+Invalid, 4877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 4685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:59,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1901 Valid, 3145 Invalid, 4877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 4685 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-23 05:46:59,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-07-23 05:46:59,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 368. [2022-07-23 05:46:59,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.1280653950953679) internal successors, (414), 367 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 414 transitions. [2022-07-23 05:46:59,703 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 414 transitions. Word has length 208 [2022-07-23 05:46:59,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:59,704 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 414 transitions. [2022-07-23 05:46:59,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 4.262626262626263) internal successors, (422), 100 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:59,704 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 414 transitions. [2022-07-23 05:46:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-07-23 05:46:59,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:59,705 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:59,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:59,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-23 05:46:59,923 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:46:59,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:59,924 INFO L85 PathProgramCache]: Analyzing trace with hash 116809543, now seen corresponding path program 41 times [2022-07-23 05:46:59,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:46:59,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111461491] [2022-07-23 05:46:59,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:59,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:46:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 89 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:01,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:47:01,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111461491] [2022-07-23 05:47:01,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111461491] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:47:01,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373898662] [2022-07-23 05:47:01,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:47:01,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:47:01,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:47:01,080 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:47:01,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-23 05:47:01,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-07-23 05:47:01,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:47:01,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 158 conjunts are in the unsatisfiable core [2022-07-23 05:47:01,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:47:02,707 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 [2022-07-23 05:47:02,847 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:47:02,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:47:02,981 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 [2022-07-23 05:47:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 89 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:02,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:47:03,237 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 [2022-07-23 05:47:03,239 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 [2022-07-23 05:47:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2234 backedges. 89 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:03,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373898662] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:47:03,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:47:03,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 83 [2022-07-23 05:47:03,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523836410] [2022-07-23 05:47:03,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:47:03,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-23 05:47:03,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:47:03,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-23 05:47:03,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6596, Unknown=0, NotChecked=0, Total=6806 [2022-07-23 05:47:03,868 INFO L87 Difference]: Start difference. First operand 368 states and 414 transitions. Second operand has 83 states, 83 states have (on average 3.927710843373494) internal successors, (326), 83 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:09,516 INFO L93 Difference]: Finished difference Result 764 states and 871 transitions. [2022-07-23 05:47:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-07-23 05:47:09,517 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.927710843373494) internal successors, (326), 83 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2022-07-23 05:47:09,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:09,518 INFO L225 Difference]: With dead ends: 764 [2022-07-23 05:47:09,518 INFO L226 Difference]: Without dead ends: 375 [2022-07-23 05:47:09,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 382 SyntacticMatches, 14 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3534 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=941, Invalid=22621, Unknown=0, NotChecked=0, Total=23562 [2022-07-23 05:47:09,523 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 1059 mSDsluCounter, 6893 mSDsCounter, 0 mSdLazyCounter, 10031 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 7008 SdHoareTripleChecker+Invalid, 10398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 10031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:09,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1059 Valid, 7008 Invalid, 10398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 10031 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-23 05:47:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-07-23 05:47:09,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 372. [2022-07-23 05:47:09,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 1.1266846361185985) internal successors, (418), 371 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:09,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 418 transitions. [2022-07-23 05:47:09,526 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 418 transitions. Word has length 213 [2022-07-23 05:47:09,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:09,526 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 418 transitions. [2022-07-23 05:47:09,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.927710843373494) internal successors, (326), 83 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:09,527 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 418 transitions. [2022-07-23 05:47:09,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-07-23 05:47:09,527 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:09,528 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:09,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-23 05:47:09,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-23 05:47:09,749 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:47:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:09,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1873213532, now seen corresponding path program 42 times [2022-07-23 05:47:09,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:47:09,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129926088] [2022-07-23 05:47:09,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:47:09,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:47:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2323 backedges. 861 proven. 1462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:10,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:47:10,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129926088] [2022-07-23 05:47:10,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129926088] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:47:10,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707742812] [2022-07-23 05:47:10,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:47:10,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:47:10,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:47:10,525 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:47:10,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-23 05:47:15,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-07-23 05:47:15,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:47:15,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 108 conjunts are in the unsatisfiable core [2022-07-23 05:47:15,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:47:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2323 backedges. 946 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:17,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:47:18,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-23 05:47:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2323 backedges. 946 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:18,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707742812] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:47:18,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:47:18,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 51, 51] total 125 [2022-07-23 05:47:18,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675408786] [2022-07-23 05:47:18,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:47:18,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-07-23 05:47:18,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:47:18,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-07-23 05:47:18,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2171, Invalid=13579, Unknown=0, NotChecked=0, Total=15750 [2022-07-23 05:47:18,902 INFO L87 Difference]: Start difference. First operand 372 states and 418 transitions. Second operand has 126 states, 125 states have (on average 4.408) internal successors, (551), 126 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:21,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:21,658 INFO L93 Difference]: Finished difference Result 396 states and 446 transitions. [2022-07-23 05:47:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-23 05:47:21,659 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 4.408) internal successors, (551), 126 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2022-07-23 05:47:21,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:21,660 INFO L225 Difference]: With dead ends: 396 [2022-07-23 05:47:21,660 INFO L226 Difference]: Without dead ends: 396 [2022-07-23 05:47:21,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 356 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5871 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5591, Invalid=24511, Unknown=0, NotChecked=0, Total=30102 [2022-07-23 05:47:21,661 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 2565 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 2845 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2565 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 3157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 2845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:21,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2565 Valid, 2039 Invalid, 3157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 2845 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-23 05:47:21,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-07-23 05:47:21,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 384. [2022-07-23 05:47:21,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.1279373368146215) internal successors, (432), 383 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 432 transitions. [2022-07-23 05:47:21,664 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 432 transitions. Word has length 217 [2022-07-23 05:47:21,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:21,664 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 432 transitions. [2022-07-23 05:47:21,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 4.408) internal successors, (551), 126 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 432 transitions. [2022-07-23 05:47:21,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-23 05:47:21,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:21,665 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:21,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-07-23 05:47:21,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:47:21,887 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:47:21,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:21,887 INFO L85 PathProgramCache]: Analyzing trace with hash -938957216, now seen corresponding path program 43 times [2022-07-23 05:47:21,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:47:21,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536040399] [2022-07-23 05:47:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:47:21,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:47:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 93 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:23,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:47:23,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536040399] [2022-07-23 05:47:23,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536040399] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:47:23,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894549939] [2022-07-23 05:47:23,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:47:23,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:47:23,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:47:23,196 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:47:23,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-23 05:47:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:23,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 164 conjunts are in the unsatisfiable core [2022-07-23 05:47:23,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:47:24,895 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 [2022-07-23 05:47:25,095 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:47:25,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:47:25,233 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 [2022-07-23 05:47:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 93 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:25,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:47:25,402 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 [2022-07-23 05:47:25,404 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 [2022-07-23 05:47:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 93 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:25,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894549939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:47:25,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:47:25,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 86 [2022-07-23 05:47:25,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097491533] [2022-07-23 05:47:25,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:47:25,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-23 05:47:25,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:47:25,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-23 05:47:25,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=7093, Unknown=0, NotChecked=0, Total=7310 [2022-07-23 05:47:25,855 INFO L87 Difference]: Start difference. First operand 384 states and 432 transitions. Second operand has 86 states, 86 states have (on average 3.941860465116279) internal successors, (339), 86 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:29,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:29,977 INFO L93 Difference]: Finished difference Result 669 states and 761 transitions. [2022-07-23 05:47:29,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-23 05:47:29,977 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.941860465116279) internal successors, (339), 86 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-07-23 05:47:29,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:29,978 INFO L225 Difference]: With dead ends: 669 [2022-07-23 05:47:29,978 INFO L226 Difference]: Without dead ends: 391 [2022-07-23 05:47:29,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 403 SyntacticMatches, 10 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2253 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=628, Invalid=18004, Unknown=0, NotChecked=0, Total=18632 [2022-07-23 05:47:29,980 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 684 mSDsluCounter, 6923 mSDsCounter, 0 mSdLazyCounter, 9708 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 7043 SdHoareTripleChecker+Invalid, 10268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 9708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:29,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 7043 Invalid, 10268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 9708 Invalid, 0 Unknown, 324 Unchecked, 2.4s Time] [2022-07-23 05:47:29,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-07-23 05:47:29,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 388. [2022-07-23 05:47:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.1266149870801034) internal successors, (436), 387 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 436 transitions. [2022-07-23 05:47:29,983 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 436 transitions. Word has length 222 [2022-07-23 05:47:29,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:29,983 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 436 transitions. [2022-07-23 05:47:29,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.941860465116279) internal successors, (339), 86 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:29,984 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 436 transitions. [2022-07-23 05:47:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-07-23 05:47:29,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:29,985 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:30,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-07-23 05:47:30,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:47:30,203 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:47:30,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:30,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1647241565, now seen corresponding path program 44 times [2022-07-23 05:47:30,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:47:30,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86921443] [2022-07-23 05:47:30,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:47:30,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:47:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 946 proven. 1586 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:31,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:47:31,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86921443] [2022-07-23 05:47:31,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86921443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:47:31,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198942993] [2022-07-23 05:47:31,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:47:31,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:47:31,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:47:31,324 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:47:31,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-23 05:47:31,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:47:31,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:47:31,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 135 conjunts are in the unsatisfiable core [2022-07-23 05:47:31,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:47:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 1035 proven. 1497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:32,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:47:34,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 05:47:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 1035 proven. 1497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:34,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198942993] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:47:34,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:47:34,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 53, 53] total 106 [2022-07-23 05:47:34,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974816202] [2022-07-23 05:47:34,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:47:34,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-23 05:47:34,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:47:34,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-23 05:47:34,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1102, Invalid=10240, Unknown=0, NotChecked=0, Total=11342 [2022-07-23 05:47:34,380 INFO L87 Difference]: Start difference. First operand 388 states and 436 transitions. Second operand has 107 states, 106 states have (on average 4.320754716981132) internal successors, (458), 107 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:38,171 INFO L93 Difference]: Finished difference Result 412 states and 464 transitions. [2022-07-23 05:47:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-23 05:47:38,172 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 106 states have (on average 4.320754716981132) internal successors, (458), 107 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2022-07-23 05:47:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:38,173 INFO L225 Difference]: With dead ends: 412 [2022-07-23 05:47:38,173 INFO L226 Difference]: Without dead ends: 412 [2022-07-23 05:47:38,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 394 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3946 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4433, Invalid=20059, Unknown=0, NotChecked=0, Total=24492 [2022-07-23 05:47:38,175 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 2669 mSDsluCounter, 3530 mSDsCounter, 0 mSdLazyCounter, 5456 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2669 SdHoareTripleChecker+Valid, 3658 SdHoareTripleChecker+Invalid, 5739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 5456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:38,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2669 Valid, 3658 Invalid, 5739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 5456 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-23 05:47:38,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-07-23 05:47:38,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 400. [2022-07-23 05:47:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.1278195488721805) internal successors, (450), 399 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) [2022-07-23 05:47:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 450 transitions. [2022-07-23 05:47:38,178 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 450 transitions. Word has length 226 [2022-07-23 05:47:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:38,178 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 450 transitions. [2022-07-23 05:47:38,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 106 states have (on average 4.320754716981132) internal successors, (458), 107 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 450 transitions. [2022-07-23 05:47:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-07-23 05:47:38,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:38,180 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:38,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-23 05:47:38,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:47:38,396 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:47:38,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:38,396 INFO L85 PathProgramCache]: Analyzing trace with hash -57860415, now seen corresponding path program 45 times [2022-07-23 05:47:38,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:47:38,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293109294] [2022-07-23 05:47:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:47:38,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:47:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2653 backedges. 97 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:39,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:47:39,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293109294] [2022-07-23 05:47:39,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293109294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:47:39,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513790502] [2022-07-23 05:47:39,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:47:39,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:47:39,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:47:39,838 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:47:39,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-23 05:47:43,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-07-23 05:47:43,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:47:43,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 170 conjunts are in the unsatisfiable core [2022-07-23 05:47:43,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:47:44,396 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 [2022-07-23 05:47:44,567 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:47:44,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:47:44,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 05:47:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2653 backedges. 97 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:44,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:47:44,968 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 [2022-07-23 05:47:44,970 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 [2022-07-23 05:47:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2653 backedges. 97 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:45,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513790502] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:47:45,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:47:45,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 89 [2022-07-23 05:47:45,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307477474] [2022-07-23 05:47:45,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:47:45,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-23 05:47:45,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:47:45,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-23 05:47:45,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=7608, Unknown=0, NotChecked=0, Total=7832 [2022-07-23 05:47:45,978 INFO L87 Difference]: Start difference. First operand 400 states and 450 transitions. Second operand has 89 states, 89 states have (on average 3.955056179775281) internal successors, (352), 89 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:50,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:50,568 INFO L93 Difference]: Finished difference Result 697 states and 793 transitions. [2022-07-23 05:47:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-23 05:47:50,570 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.955056179775281) internal successors, (352), 89 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2022-07-23 05:47:50,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:50,571 INFO L225 Difference]: With dead ends: 697 [2022-07-23 05:47:50,571 INFO L226 Difference]: Without dead ends: 407 [2022-07-23 05:47:50,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 411 SyntacticMatches, 19 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2693 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=650, Invalid=19372, Unknown=0, NotChecked=0, Total=20022 [2022-07-23 05:47:50,573 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 862 mSDsluCounter, 7707 mSDsCounter, 0 mSdLazyCounter, 10833 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 7832 SdHoareTripleChecker+Invalid, 11423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 10833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:50,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 7832 Invalid, 11423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 10833 Invalid, 0 Unknown, 295 Unchecked, 2.7s Time] [2022-07-23 05:47:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-23 05:47:50,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 404. [2022-07-23 05:47:50,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.1265508684863523) internal successors, (454), 403 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 454 transitions. [2022-07-23 05:47:50,578 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 454 transitions. Word has length 231 [2022-07-23 05:47:50,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:50,578 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 454 transitions. [2022-07-23 05:47:50,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.955056179775281) internal successors, (352), 89 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:50,579 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 454 transitions. [2022-07-23 05:47:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-23 05:47:50,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:50,587 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:50,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-07-23 05:47:50,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:47:50,801 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:47:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash 947603934, now seen corresponding path program 46 times [2022-07-23 05:47:50,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:47:50,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59835236] [2022-07-23 05:47:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:47:50,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:47:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2750 backedges. 1035 proven. 1715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:51,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:47:51,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59835236] [2022-07-23 05:47:51,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59835236] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:47:51,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902822536] [2022-07-23 05:47:51,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:47:51,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:47:51,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:47:51,900 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:47:51,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-23 05:47:52,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:47:52,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:47:52,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 144 conjunts are in the unsatisfiable core [2022-07-23 05:47:52,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:47:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2750 backedges. 1128 proven. 1622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:54,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:47:55,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-07-23 05:47:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2750 backedges. 1128 proven. 1622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:56,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902822536] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:47:56,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:47:56,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 54] total 134 [2022-07-23 05:47:56,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009110613] [2022-07-23 05:47:56,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:47:56,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-07-23 05:47:56,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:47:56,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-07-23 05:47:56,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=16238, Unknown=0, NotChecked=0, Total=18090 [2022-07-23 05:47:56,627 INFO L87 Difference]: Start difference. First operand 404 states and 454 transitions. Second operand has 135 states, 134 states have (on average 4.313432835820896) internal successors, (578), 135 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:59,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:59,960 INFO L93 Difference]: Finished difference Result 428 states and 482 transitions. [2022-07-23 05:47:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-23 05:47:59,961 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 134 states have (on average 4.313432835820896) internal successors, (578), 135 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-07-23 05:47:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:59,962 INFO L225 Difference]: With dead ends: 428 [2022-07-23 05:47:59,962 INFO L226 Difference]: Without dead ends: 428 [2022-07-23 05:47:59,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 387 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6248 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=6496, Invalid=28286, Unknown=0, NotChecked=0, Total=34782 [2022-07-23 05:47:59,964 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 2457 mSDsluCounter, 3946 mSDsCounter, 0 mSdLazyCounter, 6247 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2457 SdHoareTripleChecker+Valid, 4079 SdHoareTripleChecker+Invalid, 6494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 6247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:59,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2457 Valid, 4079 Invalid, 6494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 6247 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-23 05:47:59,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-07-23 05:47:59,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 416. [2022-07-23 05:47:59,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.127710843373494) internal successors, (468), 415 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 468 transitions. [2022-07-23 05:47:59,967 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 468 transitions. Word has length 235 [2022-07-23 05:47:59,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:59,967 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 468 transitions. [2022-07-23 05:47:59,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 134 states have (on average 4.313432835820896) internal successors, (578), 135 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:47:59,967 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 468 transitions. [2022-07-23 05:47:59,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-07-23 05:47:59,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:59,968 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:59,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-23 05:48:00,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:00,183 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:48:00,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:00,184 INFO L85 PathProgramCache]: Analyzing trace with hash -403130266, now seen corresponding path program 47 times [2022-07-23 05:48:00,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:00,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427948799] [2022-07-23 05:48:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:00,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 101 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:48:01,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:01,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427948799] [2022-07-23 05:48:01,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427948799] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:01,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250900293] [2022-07-23 05:48:01,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:48:01,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:01,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:01,578 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:48:01,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-23 05:48:02,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2022-07-23 05:48:02,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:48:02,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 176 conjunts are in the unsatisfiable core [2022-07-23 05:48:02,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:04,039 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 [2022-07-23 05:48:04,216 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:48:04,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:48:04,400 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 [2022-07-23 05:48:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 101 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:48:04,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:04,641 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 [2022-07-23 05:48:04,642 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 [2022-07-23 05:48:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2876 backedges. 101 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:48:05,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250900293] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:05,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:48:05,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 92 [2022-07-23 05:48:05,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860466911] [2022-07-23 05:48:05,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:05,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-23 05:48:05,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:05,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-23 05:48:05,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=8141, Unknown=0, NotChecked=0, Total=8372 [2022-07-23 05:48:05,410 INFO L87 Difference]: Start difference. First operand 416 states and 468 transitions. Second operand has 92 states, 92 states have (on average 3.967391304347826) internal successors, (365), 92 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:12,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:12,739 INFO L93 Difference]: Finished difference Result 866 states and 988 transitions. [2022-07-23 05:48:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-07-23 05:48:12,739 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.967391304347826) internal successors, (365), 92 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2022-07-23 05:48:12,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:12,740 INFO L225 Difference]: With dead ends: 866 [2022-07-23 05:48:12,740 INFO L226 Difference]: Without dead ends: 423 [2022-07-23 05:48:12,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 433 SyntacticMatches, 14 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4368 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1052, Invalid=28360, Unknown=0, NotChecked=0, Total=29412 [2022-07-23 05:48:12,742 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1350 mSDsluCounter, 8285 mSDsCounter, 0 mSdLazyCounter, 12010 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 8415 SdHoareTripleChecker+Invalid, 12500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 12010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:12,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1350 Valid, 8415 Invalid, 12500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 12010 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-07-23 05:48:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-23 05:48:12,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 420. [2022-07-23 05:48:12,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.126491646778043) internal successors, (472), 419 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 472 transitions. [2022-07-23 05:48:12,746 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 472 transitions. Word has length 240 [2022-07-23 05:48:12,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:12,746 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 472 transitions. [2022-07-23 05:48:12,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.967391304347826) internal successors, (365), 92 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:12,746 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 472 transitions. [2022-07-23 05:48:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-07-23 05:48:12,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:12,747 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:12,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-23 05:48:12,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-23 05:48:12,967 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:48:12,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:12,967 INFO L85 PathProgramCache]: Analyzing trace with hash 974962153, now seen corresponding path program 48 times [2022-07-23 05:48:12,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:12,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270268510] [2022-07-23 05:48:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:12,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2977 backedges. 1128 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:48:13,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:13,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270268510] [2022-07-23 05:48:13,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270268510] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:13,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82586546] [2022-07-23 05:48:13,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:48:13,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:13,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:13,951 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:48:13,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-23 05:48:18,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-07-23 05:48:18,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:48:18,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 123 conjunts are in the unsatisfiable core [2022-07-23 05:48:18,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:18,369 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 [2022-07-23 05:48:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2977 backedges. 1225 proven. 1752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:48:20,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2977 backedges. 1326 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:48:24,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82586546] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:24,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:48:24,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 56, 56] total 165 [2022-07-23 05:48:24,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449414852] [2022-07-23 05:48:24,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:24,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-07-23 05:48:24,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:24,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-07-23 05:48:24,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3501, Invalid=23889, Unknown=0, NotChecked=0, Total=27390 [2022-07-23 05:48:24,803 INFO L87 Difference]: Start difference. First operand 420 states and 472 transitions. Second operand has 166 states, 165 states have (on average 4.4) internal successors, (726), 166 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:28,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:28,623 INFO L93 Difference]: Finished difference Result 444 states and 500 transitions. [2022-07-23 05:48:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-23 05:48:28,623 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 165 states have (on average 4.4) internal successors, (726), 166 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2022-07-23 05:48:28,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:28,625 INFO L225 Difference]: With dead ends: 444 [2022-07-23 05:48:28,625 INFO L226 Difference]: Without dead ends: 444 [2022-07-23 05:48:28,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11179 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=8869, Invalid=39311, Unknown=0, NotChecked=0, Total=48180 [2022-07-23 05:48:28,628 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 2981 mSDsluCounter, 2730 mSDsCounter, 0 mSdLazyCounter, 3954 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2981 SdHoareTripleChecker+Valid, 2868 SdHoareTripleChecker+Invalid, 4272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 3954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:28,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2981 Valid, 2868 Invalid, 4272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 3954 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-23 05:48:28,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-07-23 05:48:28,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 432. [2022-07-23 05:48:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.1276102088167053) internal successors, (486), 431 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:28,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 486 transitions. [2022-07-23 05:48:28,633 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 486 transitions. Word has length 244 [2022-07-23 05:48:28,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:28,633 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 486 transitions. [2022-07-23 05:48:28,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 165 states have (on average 4.4) internal successors, (726), 166 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:28,634 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 486 transitions. [2022-07-23 05:48:28,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-07-23 05:48:28,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:28,635 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:28,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-07-23 05:48:28,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-07-23 05:48:28,851 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 05:48:28,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:28,852 INFO L85 PathProgramCache]: Analyzing trace with hash -941288645, now seen corresponding path program 49 times [2022-07-23 05:48:28,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:28,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273341668] [2022-07-23 05:48:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:28,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 105 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:48:30,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:30,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273341668] [2022-07-23 05:48:30,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273341668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:30,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095978641] [2022-07-23 05:48:30,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:48:30,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:30,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:30,350 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:48:30,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-23 05:48:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:30,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 182 conjunts are in the unsatisfiable core [2022-07-23 05:48:30,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:32,148 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 [2022-07-23 05:48:32,328 INFO L356 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-07-23 05:48:32,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-23 05:48:32,498 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 [2022-07-23 05:48:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 105 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:48:32,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:32,679 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 [2022-07-23 05:48:32,684 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 [2022-07-23 05:48:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 105 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:48:33,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095978641] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:33,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:48:33,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 95 [2022-07-23 05:48:33,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794373585] [2022-07-23 05:48:33,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:33,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-23 05:48:33,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:33,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-23 05:48:33,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=8692, Unknown=0, NotChecked=0, Total=8930 [2022-07-23 05:48:33,416 INFO L87 Difference]: Start difference. First operand 432 states and 486 transitions. Second operand has 95 states, 95 states have (on average 3.9789473684210526) internal successors, (378), 95 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)