./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-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 3a34687129125cc08371e7bb78f7bdb7a4f5274a9b22928fd388f593b6db6995 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:03:57,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:03:57,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:03:58,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:03:58,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:03:58,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:03:58,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:03:58,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:03:58,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:03:58,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:03:58,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:03:58,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:03:58,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:03:58,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:03:58,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:03:58,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:03:58,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:03:58,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:03:58,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:03:58,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:03:58,068 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:03:58,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:03:58,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:03:58,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:03:58,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:03:58,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:03:58,072 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:03:58,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:03:58,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:03:58,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:03:58,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:03:58,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:03:58,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:03:58,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:03:58,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:03:58,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:03:58,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:03:58,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:03:58,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:03:58,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:03:58,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:03:58,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:03:58,085 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:03:58,105 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:03:58,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:03:58,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:03:58,106 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:03:58,107 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:03:58,107 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:03:58,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:03:58,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:03:58,108 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:03:58,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:03:58,109 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:03:58,109 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:03:58,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:03:58,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:03:58,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:03:58,109 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:03:58,110 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:03:58,110 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:03:58,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:03:58,110 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:03:58,110 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:03:58,110 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:03:58,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:03:58,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:03:58,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:03:58,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:03:58,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:03:58,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:03:58,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:03:58,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:03:58,112 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a34687129125cc08371e7bb78f7bdb7a4f5274a9b22928fd388f593b6db6995 [2022-07-14 06:03:58,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:03:58,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:03:58,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:03:58,341 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:03:58,342 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:03:58,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2022-07-14 06:03:58,396 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/111086ebe/ec0729273cea4fbbaab7aeb6fcee6539/FLAGc22b2d468 [2022-07-14 06:03:58,811 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:03:58,811 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2022-07-14 06:03:58,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/111086ebe/ec0729273cea4fbbaab7aeb6fcee6539/FLAGc22b2d468 [2022-07-14 06:03:58,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/111086ebe/ec0729273cea4fbbaab7aeb6fcee6539 [2022-07-14 06:03:58,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:03:58,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:03:58,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:03:58,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:03:58,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:03:58,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:03:58" (1/1) ... [2022-07-14 06:03:58,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2443fd5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:03:58, skipping insertion in model container [2022-07-14 06:03:58,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:03:58" (1/1) ... [2022-07-14 06:03:58,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:03:58,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:03:59,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:03:59,133 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:03:59,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:03:59,197 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:03:59,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:03:59 WrapperNode [2022-07-14 06:03:59,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:03:59,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:03:59,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:03:59,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:03:59,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:03:59" (1/1) ... [2022-07-14 06:03:59,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:03:59" (1/1) ... [2022-07-14 06:03:59,252 INFO L137 Inliner]: procedures = 117, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2022-07-14 06:03:59,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:03:59,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:03:59,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:03:59,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:03:59,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:03:59" (1/1) ... [2022-07-14 06:03:59,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:03:59" (1/1) ... [2022-07-14 06:03:59,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:03:59" (1/1) ... [2022-07-14 06:03:59,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:03:59" (1/1) ... [2022-07-14 06:03:59,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:03:59" (1/1) ... [2022-07-14 06:03:59,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:03:59" (1/1) ... [2022-07-14 06:03:59,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:03:59" (1/1) ... [2022-07-14 06:03:59,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:03:59,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:03:59,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:03:59,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:03:59,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:03:59" (1/1) ... [2022-07-14 06:03:59,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:03:59,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:03:59,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 06:03:59,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 06:03:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 06:03:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 06:03:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:03:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:03:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:03:59,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:03:59,457 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:03:59,458 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:03:59,625 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:03:59,631 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:03:59,632 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-14 06:03:59,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:03:59 BoogieIcfgContainer [2022-07-14 06:03:59,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:03:59,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:03:59,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:03:59,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:03:59,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:03:58" (1/3) ... [2022-07-14 06:03:59,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e010b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:03:59, skipping insertion in model container [2022-07-14 06:03:59,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:03:59" (2/3) ... [2022-07-14 06:03:59,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e010b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:03:59, skipping insertion in model container [2022-07-14 06:03:59,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:03:59" (3/3) ... [2022-07-14 06:03:59,646 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cmemrchr-alloca-2.i [2022-07-14 06:03:59,655 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:03:59,655 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-07-14 06:03:59,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:03:59,688 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@71bfcfdb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@591ac8e7 [2022-07-14 06:03:59,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-14 06:03:59,691 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 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) [2022-07-14 06:03:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:03:59,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:03:59,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:03:59,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:03:59,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:03:59,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-14 06:03:59,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:03:59,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173164956] [2022-07-14 06:03:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:03:59,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:03:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:03:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:03:59,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:03:59,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173164956] [2022-07-14 06:03:59,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173164956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:03:59,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:03:59,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:03:59,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055980010] [2022-07-14 06:03:59,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:03:59,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:03:59,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:03:59,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:03:59,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:03:59,910 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 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) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:03:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:03:59,975 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-07-14 06:03:59,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:03:59,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:03:59,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:03:59,982 INFO L225 Difference]: With dead ends: 46 [2022-07-14 06:03:59,982 INFO L226 Difference]: Without dead ends: 42 [2022-07-14 06:03:59,984 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 [2022-07-14 06:03:59,987 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 59 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:03:59,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 44 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:03:59,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-14 06:04:00,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2022-07-14 06:04:00,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 22 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) [2022-07-14 06:04:00,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-07-14 06:04:00,012 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 7 [2022-07-14 06:04:00,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:00,012 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-07-14 06:04:00,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:00,013 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-07-14 06:04:00,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:04:00,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:00,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:00,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 06:04:00,013 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:04:00,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:00,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2022-07-14 06:04:00,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:00,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225780928] [2022-07-14 06:04:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:00,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:00,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:00,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225780928] [2022-07-14 06:04:00,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225780928] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:00,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:00,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:04:00,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946067373] [2022-07-14 06:04:00,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:00,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:04:00,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:00,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:04:00,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:04:00,076 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:00,113 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-07-14 06:04:00,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:04:00,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:04:00,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:00,116 INFO L225 Difference]: With dead ends: 27 [2022-07-14 06:04:00,116 INFO L226 Difference]: Without dead ends: 27 [2022-07-14 06:04:00,116 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 [2022-07-14 06:04:00,118 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:00,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-14 06:04:00,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-14 06:04:00,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 24 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) [2022-07-14 06:04:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-14 06:04:00,122 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 7 [2022-07-14 06:04:00,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:00,122 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-14 06:04:00,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:00,122 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-14 06:04:00,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:04:00,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:00,123 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:00,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 06:04:00,123 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:04:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:00,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2022-07-14 06:04:00,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:00,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660208406] [2022-07-14 06:04:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:00,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:00,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:00,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660208406] [2022-07-14 06:04:00,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660208406] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:00,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452738224] [2022-07-14 06:04:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:00,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:00,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:00,164 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:04:00,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 06:04:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:00,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:04:00,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:00,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:04:00,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452738224] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:00,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:04:00,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-07-14 06:04:00,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387448805] [2022-07-14 06:04:00,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:00,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:04:00,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:00,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:04:00,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:04:00,345 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:00,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:00,367 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-07-14 06:04:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:04:00,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-14 06:04:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:00,369 INFO L225 Difference]: With dead ends: 44 [2022-07-14 06:04:00,369 INFO L226 Difference]: Without dead ends: 44 [2022-07-14 06:04:00,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:04:00,371 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:00,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 62 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:00,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-14 06:04:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2022-07-14 06:04:00,377 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) [2022-07-14 06:04:00,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-07-14 06:04:00,378 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2022-07-14 06:04:00,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:00,379 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-07-14 06:04:00,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:00,379 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-07-14 06:04:00,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:04:00,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:00,380 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:00,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-14 06:04:00,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:00,596 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:04:00,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:00,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1579537130, now seen corresponding path program 1 times [2022-07-14 06:04:00,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:00,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463662087] [2022-07-14 06:04:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:00,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:00,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:00,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463662087] [2022-07-14 06:04:00,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463662087] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:00,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075317542] [2022-07-14 06:04:00,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:00,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:00,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:00,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:04:00,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 06:04:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:00,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:04:00,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:00,827 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 [2022-07-14 06:04:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:00,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:01,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075317542] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:01,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:01,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-14 06:04:01,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49416632] [2022-07-14 06:04:01,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:01,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:04:01,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:01,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:04:01,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:04:01,029 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:01,088 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-07-14 06:04:01,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:04:01,089 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-14 06:04:01,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:01,090 INFO L225 Difference]: With dead ends: 32 [2022-07-14 06:04:01,090 INFO L226 Difference]: Without dead ends: 32 [2022-07-14 06:04:01,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:04:01,091 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:01,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 74 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:01,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-14 06:04:01,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-07-14 06:04:01,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-07-14 06:04:01,095 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 11 [2022-07-14 06:04:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:01,096 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-07-14 06:04:01,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-07-14 06:04:01,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:04:01,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:01,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:01,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:01,303 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,SelfDestructingSolverStorable3 [2022-07-14 06:04:01,304 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:04:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:01,305 INFO L85 PathProgramCache]: Analyzing trace with hash -373722351, now seen corresponding path program 1 times [2022-07-14 06:04:01,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:01,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242639293] [2022-07-14 06:04:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:01,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:01,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:01,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242639293] [2022-07-14 06:04:01,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242639293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:01,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:01,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:04:01,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176685010] [2022-07-14 06:04:01,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:01,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:04:01,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:01,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:04:01,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:04:01,351 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:01,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:01,412 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-07-14 06:04:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:04:01,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-14 06:04:01,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:01,431 INFO L225 Difference]: With dead ends: 30 [2022-07-14 06:04:01,432 INFO L226 Difference]: Without dead ends: 30 [2022-07-14 06:04:01,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:04:01,432 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:01,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 55 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-14 06:04:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-07-14 06:04:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 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) [2022-07-14 06:04:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-07-14 06:04:01,435 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2022-07-14 06:04:01,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:01,435 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-07-14 06:04:01,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:01,435 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-07-14 06:04:01,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:04:01,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:01,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:01,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 06:04:01,436 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:04:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:01,436 INFO L85 PathProgramCache]: Analyzing trace with hash -373722350, now seen corresponding path program 1 times [2022-07-14 06:04:01,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:01,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634040643] [2022-07-14 06:04:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:01,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:01,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:01,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634040643] [2022-07-14 06:04:01,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634040643] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:01,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573281027] [2022-07-14 06:04:01,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:01,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:01,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:01,616 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:04:01,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 06:04:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:01,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-14 06:04:01,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:02,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:03,028 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 60 treesize of output 54 [2022-07-14 06:04:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:03,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573281027] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:03,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:03,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-07-14 06:04:03,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103924660] [2022-07-14 06:04:03,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:03,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 06:04:03,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:03,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 06:04:03,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:04:03,140 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 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) [2022-07-14 06:04:03,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:03,434 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2022-07-14 06:04:03,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:04:03,435 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 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) Word has length 14 [2022-07-14 06:04:03,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:03,436 INFO L225 Difference]: With dead ends: 61 [2022-07-14 06:04:03,436 INFO L226 Difference]: Without dead ends: 61 [2022-07-14 06:04:03,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:04:03,436 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 177 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:03,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 197 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:04:03,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-14 06:04:03,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 32. [2022-07-14 06:04:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:03,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-07-14 06:04:03,439 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 14 [2022-07-14 06:04:03,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:03,439 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-07-14 06:04:03,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 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) [2022-07-14 06:04:03,439 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-07-14 06:04:03,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:04:03,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:03,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:03,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:03,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:03,652 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:04:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:03,652 INFO L85 PathProgramCache]: Analyzing trace with hash 327342228, now seen corresponding path program 1 times [2022-07-14 06:04:03,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:03,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240171722] [2022-07-14 06:04:03,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:03,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:03,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:03,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240171722] [2022-07-14 06:04:03,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240171722] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:03,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148213191] [2022-07-14 06:04:03,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:03,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:03,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:03,800 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:04:03,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 06:04:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:03,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-14 06:04:03,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:04,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:04,376 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 60 treesize of output 54 [2022-07-14 06:04:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:04,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148213191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:04,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:04,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-07-14 06:04:04,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083932788] [2022-07-14 06:04:04,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:04,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-14 06:04:04,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:04,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-14 06:04:04,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:04:04,558 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 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) [2022-07-14 06:04:05,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:05,340 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2022-07-14 06:04:05,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-14 06:04:05,341 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-14 06:04:05,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:05,341 INFO L225 Difference]: With dead ends: 85 [2022-07-14 06:04:05,342 INFO L226 Difference]: Without dead ends: 85 [2022-07-14 06:04:05,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=481, Invalid=1241, Unknown=0, NotChecked=0, Total=1722 [2022-07-14 06:04:05,343 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 480 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:05,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 134 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:04:05,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-14 06:04:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 30. [2022-07-14 06:04:05,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-14 06:04:05,347 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 14 [2022-07-14 06:04:05,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:05,347 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-14 06:04:05,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 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) [2022-07-14 06:04:05,347 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-14 06:04:05,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 06:04:05,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:05,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:05,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:05,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:05,556 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:04:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1007310944, now seen corresponding path program 1 times [2022-07-14 06:04:05,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:05,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318899008] [2022-07-14 06:04:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:05,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:04:05,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:05,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318899008] [2022-07-14 06:04:05,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318899008] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:05,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:05,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:04:05,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695271973] [2022-07-14 06:04:05,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:05,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:04:05,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:05,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:04:05,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:04:05,601 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:05,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:05,607 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-07-14 06:04:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:04:05,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2022-07-14 06:04:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:05,608 INFO L225 Difference]: With dead ends: 29 [2022-07-14 06:04:05,608 INFO L226 Difference]: Without dead ends: 26 [2022-07-14 06:04:05,608 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 [2022-07-14 06:04:05,609 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:05,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:05,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-14 06:04:05,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-14 06:04:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) 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) [2022-07-14 06:04:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-07-14 06:04:05,611 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2022-07-14 06:04:05,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:05,611 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-07-14 06:04:05,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:05,611 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-07-14 06:04:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-14 06:04:05,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:05,612 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:05,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-14 06:04:05,612 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:04:05,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:05,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1656754904, now seen corresponding path program 1 times [2022-07-14 06:04:05,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:05,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476243352] [2022-07-14 06:04:05,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:05,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:04:05,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:05,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476243352] [2022-07-14 06:04:05,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476243352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:05,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:05,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:04:05,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301711827] [2022-07-14 06:04:05,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:05,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:04:05,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:05,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:04:05,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:04:05,660 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:05,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:05,686 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-07-14 06:04:05,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:04:05,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-14 06:04:05,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:05,687 INFO L225 Difference]: With dead ends: 33 [2022-07-14 06:04:05,687 INFO L226 Difference]: Without dead ends: 20 [2022-07-14 06:04:05,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:04:05,688 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:05,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 54 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:05,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-14 06:04:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-14 06:04:05,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-07-14 06:04:05,700 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2022-07-14 06:04:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:05,700 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-07-14 06:04:05,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:05,700 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-07-14 06:04:05,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-14 06:04:05,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:05,701 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:05,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-14 06:04:05,702 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:04:05,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:05,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1617144038, now seen corresponding path program 1 times [2022-07-14 06:04:05,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:05,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236070455] [2022-07-14 06:04:05,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:05,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:05,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:05,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236070455] [2022-07-14 06:04:05,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236070455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:05,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113834138] [2022-07-14 06:04:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:05,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:05,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:05,776 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:04:05,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 06:04:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:05,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:04:05,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:05,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:05,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113834138] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:05,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:05,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-07-14 06:04:05,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464144808] [2022-07-14 06:04:05,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:05,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 06:04:05,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:05,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 06:04:05,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:04:05,954 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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) [2022-07-14 06:04:06,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:06,038 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-07-14 06:04:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:04:06,039 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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) Word has length 19 [2022-07-14 06:04:06,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:06,039 INFO L225 Difference]: With dead ends: 34 [2022-07-14 06:04:06,039 INFO L226 Difference]: Without dead ends: 27 [2022-07-14 06:04:06,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:04:06,040 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:06,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 100 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:06,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-14 06:04:06,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-07-14 06:04:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-07-14 06:04:06,043 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2022-07-14 06:04:06,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:06,043 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-07-14 06:04:06,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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) [2022-07-14 06:04:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-07-14 06:04:06,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-14 06:04:06,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:06,044 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:06,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-14 06:04:06,259 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,SelfDestructingSolverStorable9 [2022-07-14 06:04:06,260 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:04:06,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:06,260 INFO L85 PathProgramCache]: Analyzing trace with hash -309577815, now seen corresponding path program 2 times [2022-07-14 06:04:06,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:06,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852063438] [2022-07-14 06:04:06,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:06,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:06,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:06,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852063438] [2022-07-14 06:04:06,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852063438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:06,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100320065] [2022-07-14 06:04:06,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:04:06,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:06,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:06,456 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:04:06,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 06:04:06,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:04:06,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:06,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-14 06:04:06,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:06,554 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 [2022-07-14 06:04:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:06,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:07,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100320065] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:07,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:07,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2022-07-14 06:04:07,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989559796] [2022-07-14 06:04:07,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:07,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-14 06:04:07,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:07,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-14 06:04:07,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-07-14 06:04:07,454 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:08,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:08,812 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2022-07-14 06:04:08,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-14 06:04:08,812 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-14 06:04:08,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:08,813 INFO L225 Difference]: With dead ends: 80 [2022-07-14 06:04:08,813 INFO L226 Difference]: Without dead ends: 80 [2022-07-14 06:04:08,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=643, Invalid=2779, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 06:04:08,814 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 199 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:08,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 208 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:04:08,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-14 06:04:08,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2022-07-14 06:04:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2022-07-14 06:04:08,818 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 23 [2022-07-14 06:04:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:08,819 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2022-07-14 06:04:08,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2022-07-14 06:04:08,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 06:04:08,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:08,820 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:08,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-14 06:04:09,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:09,038 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:04:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:09,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1540133135, now seen corresponding path program 3 times [2022-07-14 06:04:09,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:09,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117833255] [2022-07-14 06:04:09,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:09,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:09,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:09,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117833255] [2022-07-14 06:04:09,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117833255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:09,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442741775] [2022-07-14 06:04:09,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:04:09,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:09,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:09,126 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:04:09,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 06:04:09,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:04:09,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:09,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-14 06:04:09,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:09,229 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 [2022-07-14 06:04:09,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:04:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:09,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:09,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442741775] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:09,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:09,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-07-14 06:04:09,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594144882] [2022-07-14 06:04:09,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:09,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-14 06:04:09,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:09,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-14 06:04:09,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:04:09,492 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:09,659 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-07-14 06:04:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:04:09,661 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-14 06:04:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:09,661 INFO L225 Difference]: With dead ends: 59 [2022-07-14 06:04:09,662 INFO L226 Difference]: Without dead ends: 47 [2022-07-14 06:04:09,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-07-14 06:04:09,662 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:09,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 205 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:04:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-14 06:04:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-14 06:04:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2022-07-14 06:04:09,665 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 28 [2022-07-14 06:04:09,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:09,666 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2022-07-14 06:04:09,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:09,666 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2022-07-14 06:04:09,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 06:04:09,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:09,667 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:09,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-14 06:04:09,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:09,882 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:04:09,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:09,883 INFO L85 PathProgramCache]: Analyzing trace with hash 884722574, now seen corresponding path program 4 times [2022-07-14 06:04:09,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:09,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426134895] [2022-07-14 06:04:09,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:09,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:04:10,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:10,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426134895] [2022-07-14 06:04:10,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426134895] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:10,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279820772] [2022-07-14 06:04:10,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:04:10,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:10,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:10,073 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:04:10,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 06:04:10,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:04:10,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:10,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-14 06:04:10,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:10,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:10,655 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:10,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-07-14 06:04:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:40,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279820772] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:40,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:40,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2022-07-14 06:04:40,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806967776] [2022-07-14 06:04:40,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:40,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-14 06:04:40,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:40,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-14 06:04:40,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1222, Unknown=4, NotChecked=0, Total=1332 [2022-07-14 06:04:40,837 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 37 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:13,620 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification. DAG size of input: 169 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:05:47,254 WARN L233 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 180 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:06:03,934 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 194 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:06:05,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:06:45,796 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 216 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:06:56,531 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse22 (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296)) (.cse9 (* (- 1) |c_ULTIMATE.start_main_~nondetArea~0#1.offset|)) (.cse3 (* (- 1) |c_ULTIMATE.start_main_~i~0#1|)) (.cse23 (mod |c_ULTIMATE.start_cmemrchr_~n#1| 4294967296))) (let ((.cse13 (<= .cse23 2147483647)) (.cse14 (+ .cse23 |c_ULTIMATE.start_cmemrchr_~s#1.offset|)) (.cse6 (div (+ (- 3) .cse3) (- 4294967296))) (.cse5 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967294)) 4294967296)) (.cse2 (div (+ (- 4294967299) |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) (- 4294967296))) (.cse7 (div (+ (- 2147483651) |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) (- 4294967296))) (.cse8 (div (+ .cse9 1) (- 4294967296))) (.cse0 (select |c_#length| |c_ULTIMATE.start_cmemrchr_~cp~0#1.base|)) (.cse18 (div (+ (- 4294967293) |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse19 (div (+ (- 4) .cse3) (- 4294967296))) (.cse15 (div (+ (- 3) |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) 4294967296)) (.cse16 (div (+ .cse9 (- 2147483647)) (- 4294967296))) (.cse12 (div (+ (- 2) .cse3) (- 4294967296))) (.cse11 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967295)) 4294967296)) (.cse20 (+ .cse22 |c_ULTIMATE.start_main_~nondetArea~0#1.offset|)) (.cse21 (<= .cse22 2147483647))) (and (or (let ((.cse1 (+ (* 4294967296 (div |c_ULTIMATE.start_cmemrchr_~n#1| 4294967296)) |c_ULTIMATE.start_cmemrchr_~cp~0#1.offset| 1))) (and (<= (+ |c_ULTIMATE.start_cmemrchr_~cp~0#1.offset| 1) .cse0) (<= .cse1 |c_ULTIMATE.start_cmemrchr_~n#1|) (<= |c_ULTIMATE.start_cmemrchr_~n#1| .cse1))) (<= (+ 2 |c_ULTIMATE.start_cmemrchr_~cp~0#1.offset|) 0)) (let ((.cse4 (div (+ .cse9 4294967294 .cse3) (- 4294967296)))) (or (<= (+ .cse2 (div (+ 2147483645 .cse3) (- 4294967296)) .cse4) (+ 4 (* .cse5 2))) (<= (* 2 .cse6) (+ .cse5 3 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967297) |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) 4294967296))) (<= (+ .cse7 .cse4 .cse8) (+ .cse5 3)))) (= 0 |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 2 |c_ULTIMATE.start_cmemrchr_~cp~0#1.offset|) (let ((.cse10 (div (+ .cse9 4294967295 .cse3) (- 4294967296)))) (or (<= (+ .cse7 .cse8 .cse10) (+ .cse11 3)) (<= (+ .cse2 (div (+ .cse3 2147483646) (- 4294967296)) .cse10) (+ 4 (* .cse11 2))) (<= (* 2 .cse12) (+ .cse11 3 (div (+ (- 4294967298) |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) 4294967296))))) (or .cse13 (not (<= 4294967297 .cse14)) (<= 4294967299 .cse14)) (<= |c_ULTIMATE.start_cmemrchr_~cp~0#1.offset| (+ .cse0 1)) (or (<= 3 .cse14) (not .cse13) (not (<= 1 .cse14))) (or (<= (+ .cse6 (div (+ (- 2) .cse9 .cse3) (- 4294967296))) (+ .cse15 (div (+ (- 1) |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) 4294967296) 4 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 2147483646)) 4294967296))) (<= (+ .cse16 .cse6) (+ .cse5 2))) (let ((.cse17 (div (+ .cse9 .cse3 4294967293) (- 4294967296)))) (or (<= (+ .cse2 .cse17 (div (+ 2147483644 .cse3) (- 4294967296))) (+ (* .cse18 2) 4)) (<= (+ .cse7 .cse17 .cse8) (+ .cse18 3)) (<= (* .cse19 2) (+ (div (+ |c_ULTIMATE.start_main_~i~0#1| (- 4294967296) |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) 4294967296) .cse18 3)))) (= |c_ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= |c_ULTIMATE.start_cmemrchr_~cp~0#1.offset| .cse0) (<= 1 |c_ULTIMATE.start_cmemrchr_~cp~0#1.offset|) (or (<= (+ .cse19 .cse16) (+ .cse18 2)) (<= (+ .cse19 (div (+ .cse9 (- 3) .cse3) (- 4294967296))) (+ (div (+ (- 2147483645) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) .cse15 (div (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) 4294967296) 4))) (or (not (<= 1 .cse20)) (<= 3 .cse20) (not .cse21)) (= |c_ULTIMATE.start_main_~n~0#1| (select |c_#length| |c_ULTIMATE.start_main_~nondetArea~0#1.base|)) (or (<= (+ (div (+ (- 1) .cse9 .cse3) (- 4294967296)) .cse12) (+ .cse15 (div (+ (- 2) |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~nondetArea~0#1.offset|) 4294967296) (div (+ (- 2147483647) |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 4)) (<= (+ .cse16 .cse12) (+ .cse11 2))) (or (not (<= 4294967297 .cse20)) (<= 4294967299 .cse20) .cse21)))) is different from false