./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-properties/simple-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 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/list-properties/simple-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 a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 06:11:24,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 06:11:24,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 06:11:24,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 06:11:24,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 06:11:24,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 06:11:24,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 06:11:24,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 06:11:24,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 06:11:24,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 06:11:24,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 06:11:24,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 06:11:24,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 06:11:24,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 06:11:24,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 06:11:24,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 06:11:24,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 06:11:24,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 06:11:24,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 06:11:24,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 06:11:24,860 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 06:11:24,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 06:11:24,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 06:11:24,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 06:11:24,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 06:11:24,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 06:11:24,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 06:11:24,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 06:11:24,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 06:11:24,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 06:11:24,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 06:11:24,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 06:11:24,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 06:11:24,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 06:11:24,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 06:11:24,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 06:11:24,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 06:11:24,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 06:11:24,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 06:11:24,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 06:11:24,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 06:11:24,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 06:11:24,878 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 06:11:24,894 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 06:11:24,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 06:11:24,894 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 06:11:24,894 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 06:11:24,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 06:11:24,895 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 06:11:24,895 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 06:11:24,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 06:11:24,895 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 06:11:24,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 06:11:24,896 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 06:11:24,896 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 06:11:24,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 06:11:24,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 06:11:24,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 06:11:24,896 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 06:11:24,896 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 06:11:24,896 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 06:11:24,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 06:11:24,896 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 06:11:24,896 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 06:11:24,896 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 06:11:24,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 06:11:24,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 06:11:24,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 06:11:24,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:11:24,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 06:11:24,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 06:11:24,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 06:11:24,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 06:11:24,897 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2022-07-20 06:11:25,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 06:11:25,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 06:11:25,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 06:11:25,136 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 06:11:25,136 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 06:11:25,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-2.i [2022-07-20 06:11:25,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9c87df37/2abc6ce887ac44308ae41365d415f479/FLAGf9ede5bdb [2022-07-20 06:11:25,594 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 06:11:25,595 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i [2022-07-20 06:11:25,615 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9c87df37/2abc6ce887ac44308ae41365d415f479/FLAGf9ede5bdb [2022-07-20 06:11:25,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9c87df37/2abc6ce887ac44308ae41365d415f479 [2022-07-20 06:11:25,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 06:11:25,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 06:11:25,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 06:11:25,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 06:11:25,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 06:11:25,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:11:25" (1/1) ... [2022-07-20 06:11:25,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9451ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:25, skipping insertion in model container [2022-07-20 06:11:25,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:11:25" (1/1) ... [2022-07-20 06:11:25,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 06:11:25,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 06:11:25,973 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2022-07-20 06:11:25,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:11:25,984 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 06:11:26,022 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2022-07-20 06:11:26,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:11:26,049 INFO L208 MainTranslator]: Completed translation [2022-07-20 06:11:26,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:26 WrapperNode [2022-07-20 06:11:26,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 06:11:26,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 06:11:26,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 06:11:26,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 06:11:26,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:26" (1/1) ... [2022-07-20 06:11:26,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:26" (1/1) ... [2022-07-20 06:11:26,097 INFO L137 Inliner]: procedures = 124, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2022-07-20 06:11:26,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 06:11:26,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 06:11:26,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 06:11:26,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 06:11:26,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:26" (1/1) ... [2022-07-20 06:11:26,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:26" (1/1) ... [2022-07-20 06:11:26,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:26" (1/1) ... [2022-07-20 06:11:26,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:26" (1/1) ... [2022-07-20 06:11:26,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:26" (1/1) ... [2022-07-20 06:11:26,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:26" (1/1) ... [2022-07-20 06:11:26,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:26" (1/1) ... [2022-07-20 06:11:26,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 06:11:26,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 06:11:26,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 06:11:26,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 06:11:26,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:26" (1/1) ... [2022-07-20 06:11:26,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:11:26,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:11:26,152 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) [2022-07-20 06:11:26,153 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 [2022-07-20 06:11:26,178 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-07-20 06:11:26,179 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-07-20 06:11:26,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 06:11:26,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 06:11:26,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 06:11:26,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 06:11:26,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 06:11:26,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 06:11:26,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 06:11:26,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 06:11:26,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 06:11:26,252 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 06:11:26,254 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 06:11:26,285 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-07-20 06:11:26,392 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 06:11:26,396 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 06:11:26,396 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 06:11:26,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:11:26 BoogieIcfgContainer [2022-07-20 06:11:26,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 06:11:26,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 06:11:26,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 06:11:26,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 06:11:26,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:11:25" (1/3) ... [2022-07-20 06:11:26,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b66bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:11:26, skipping insertion in model container [2022-07-20 06:11:26,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:26" (2/3) ... [2022-07-20 06:11:26,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b66bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:11:26, skipping insertion in model container [2022-07-20 06:11:26,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:11:26" (3/3) ... [2022-07-20 06:11:26,404 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2022-07-20 06:11:26,414 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 06:11:26,415 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-07-20 06:11:26,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 06:11:26,448 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@12223c4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7440a6fd [2022-07-20 06:11:26,449 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-07-20 06:11:26,452 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:26,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 06:11:26,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:26,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 06:11:26,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:26,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:26,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1037517224, now seen corresponding path program 1 times [2022-07-20 06:11:26,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:11:26,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935182917] [2022-07-20 06:11:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:26,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:11:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:26,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:11:26,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935182917] [2022-07-20 06:11:26,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935182917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:11:26,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:11:26,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:11:26,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341171719] [2022-07-20 06:11:26,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:11:26,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 06:11:26,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:11:26,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 06:11:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 06:11:26,647 INFO L87 Difference]: Start difference. First operand has 45 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:11:26,659 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-07-20 06:11:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 06:11:26,662 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-20 06:11:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:11:26,666 INFO L225 Difference]: With dead ends: 45 [2022-07-20 06:11:26,666 INFO L226 Difference]: Without dead ends: 39 [2022-07-20 06:11:26,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 06:11:26,671 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:11:26,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:11:26,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-20 06:11:26,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-20 06:11:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 38 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) [2022-07-20 06:11:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-07-20 06:11:26,695 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 6 [2022-07-20 06:11:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:11:26,695 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-07-20 06:11:26,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:26,695 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-07-20 06:11:26,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 06:11:26,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:26,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:26,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 06:11:26,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:26,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:26,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2098238120, now seen corresponding path program 1 times [2022-07-20 06:11:26,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:11:26,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104530162] [2022-07-20 06:11:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:26,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:11:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:26,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:11:26,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104530162] [2022-07-20 06:11:26,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104530162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:11:26,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:11:26,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:11:26,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112687961] [2022-07-20 06:11:26,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:11:26,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:11:26,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:11:26,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:11:26,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:11:26,755 INFO L87 Difference]: Start difference. First operand 39 states and 40 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) [2022-07-20 06:11:26,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:11:26,822 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2022-07-20 06:11:26,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:11:26,823 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 [2022-07-20 06:11:26,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:11:26,826 INFO L225 Difference]: With dead ends: 47 [2022-07-20 06:11:26,826 INFO L226 Difference]: Without dead ends: 47 [2022-07-20 06:11:26,829 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 [2022-07-20 06:11:26,831 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:11:26,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 16 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:11:26,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-20 06:11:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-07-20 06:11:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-07-20 06:11:26,842 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 7 [2022-07-20 06:11:26,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:11:26,842 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-07-20 06:11:26,842 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) [2022-07-20 06:11:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-07-20 06:11:26,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 06:11:26,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:26,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:26,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 06:11:26,844 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:26,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:26,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2098238121, now seen corresponding path program 1 times [2022-07-20 06:11:26,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:11:26,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086100732] [2022-07-20 06:11:26,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:26,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:11:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:26,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:11:26,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086100732] [2022-07-20 06:11:26,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086100732] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:11:26,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:11:26,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:11:26,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025741943] [2022-07-20 06:11:26,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:11:26,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:11:26,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:11:26,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:11:26,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:11:26,917 INFO L87 Difference]: Start difference. First operand 41 states and 47 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) [2022-07-20 06:11:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:11:26,994 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2022-07-20 06:11:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:11:26,994 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 [2022-07-20 06:11:26,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:11:26,995 INFO L225 Difference]: With dead ends: 56 [2022-07-20 06:11:26,996 INFO L226 Difference]: Without dead ends: 56 [2022-07-20 06:11:26,996 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 [2022-07-20 06:11:26,998 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:11:27,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 25 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:11:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-20 06:11:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2022-07-20 06:11:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 47 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) [2022-07-20 06:11:27,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-07-20 06:11:27,006 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 7 [2022-07-20 06:11:27,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:11:27,006 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-07-20 06:11:27,006 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) [2022-07-20 06:11:27,006 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-07-20 06:11:27,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 06:11:27,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:27,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:27,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 06:11:27,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:27,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1884133396, now seen corresponding path program 1 times [2022-07-20 06:11:27,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:11:27,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029399511] [2022-07-20 06:11:27,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:27,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:11:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:27,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:11:27,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029399511] [2022-07-20 06:11:27,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029399511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:11:27,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:11:27,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:11:27,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51930585] [2022-07-20 06:11:27,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:11:27,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:11:27,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:11:27,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:11:27,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:11:27,049 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:27,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:11:27,093 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2022-07-20 06:11:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:11:27,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-20 06:11:27,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:11:27,094 INFO L225 Difference]: With dead ends: 53 [2022-07-20 06:11:27,094 INFO L226 Difference]: Without dead ends: 53 [2022-07-20 06:11:27,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:11:27,095 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:11:27,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:11:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-20 06:11:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2022-07-20 06:11:27,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 47 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:27,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-07-20 06:11:27,099 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 12 [2022-07-20 06:11:27,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:11:27,099 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-07-20 06:11:27,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-07-20 06:11:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 06:11:27,100 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:27,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:27,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 06:11:27,101 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:27,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:27,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1721365971, now seen corresponding path program 1 times [2022-07-20 06:11:27,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:11:27,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174400942] [2022-07-20 06:11:27,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:27,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:11:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:27,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:11:27,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174400942] [2022-07-20 06:11:27,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174400942] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:11:27,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:11:27,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 06:11:27,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437701430] [2022-07-20 06:11:27,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:11:27,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:11:27,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:11:27,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:11:27,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:11:27,197 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:27,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:11:27,298 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2022-07-20 06:11:27,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:11:27,299 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-20 06:11:27,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:11:27,302 INFO L225 Difference]: With dead ends: 85 [2022-07-20 06:11:27,302 INFO L226 Difference]: Without dead ends: 85 [2022-07-20 06:11:27,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:11:27,304 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 68 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:11:27,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 99 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:11:27,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-20 06:11:27,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2022-07-20 06:11:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.375) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-07-20 06:11:27,320 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 13 [2022-07-20 06:11:27,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:11:27,321 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-07-20 06:11:27,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-07-20 06:11:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 06:11:27,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:27,323 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:27,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 06:11:27,326 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:27,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:27,326 INFO L85 PathProgramCache]: Analyzing trace with hash 761251611, now seen corresponding path program 1 times [2022-07-20 06:11:27,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:11:27,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342874461] [2022-07-20 06:11:27,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:27,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:11:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:27,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:11:27,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342874461] [2022-07-20 06:11:27,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342874461] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:11:27,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:11:27,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:11:27,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085149215] [2022-07-20 06:11:27,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:11:27,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:11:27,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:11:27,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:11:27,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:11:27,401 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:11:27,489 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2022-07-20 06:11:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:11:27,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-20 06:11:27,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:11:27,491 INFO L225 Difference]: With dead ends: 64 [2022-07-20 06:11:27,491 INFO L226 Difference]: Without dead ends: 64 [2022-07-20 06:11:27,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:11:27,493 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:11:27,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 93 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:11:27,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-20 06:11:27,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2022-07-20 06:11:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.325) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-07-20 06:11:27,510 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 15 [2022-07-20 06:11:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:11:27,510 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-07-20 06:11:27,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-07-20 06:11:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 06:11:27,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:27,511 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:27,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 06:11:27,512 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:27,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:27,512 INFO L85 PathProgramCache]: Analyzing trace with hash 761251612, now seen corresponding path program 1 times [2022-07-20 06:11:27,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:11:27,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380357357] [2022-07-20 06:11:27,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:27,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:11:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:27,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:11:27,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380357357] [2022-07-20 06:11:27,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380357357] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:11:27,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:11:27,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:11:27,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059378296] [2022-07-20 06:11:27,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:11:27,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:11:27,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:11:27,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:11:27,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:11:27,618 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:27,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:11:27,745 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2022-07-20 06:11:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:11:27,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-20 06:11:27,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:11:27,747 INFO L225 Difference]: With dead ends: 60 [2022-07-20 06:11:27,747 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 06:11:27,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-20 06:11:27,749 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:11:27,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 111 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:11:27,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 06:11:27,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2022-07-20 06:11:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:27,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-07-20 06:11:27,756 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 15 [2022-07-20 06:11:27,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:11:27,756 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-07-20 06:11:27,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:27,757 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-07-20 06:11:27,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 06:11:27,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:27,758 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:27,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 06:11:27,758 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:27,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:27,759 INFO L85 PathProgramCache]: Analyzing trace with hash 700715683, now seen corresponding path program 1 times [2022-07-20 06:11:27,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:11:27,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50527619] [2022-07-20 06:11:27,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:27,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:11:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:27,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:11:27,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50527619] [2022-07-20 06:11:27,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50527619] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:11:27,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648748809] [2022-07-20 06:11:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:27,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:11:27,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:11:27,882 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) [2022-07-20 06:11:27,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 06:11:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:27,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 06:11:27,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:11:28,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:11:28,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:11:28,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:11:28,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:11:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:28,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:11:28,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-07-20 06:11:28,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:11:28,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:11:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:28,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648748809] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:11:28,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:11:28,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 16 [2022-07-20 06:11:28,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61794958] [2022-07-20 06:11:28,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:11:28,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 06:11:28,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:11:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 06:11:28,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-07-20 06:11:28,464 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:28,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:11:28,619 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-07-20 06:11:28,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:11:28,620 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 06:11:28,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:11:28,620 INFO L225 Difference]: With dead ends: 55 [2022-07-20 06:11:28,620 INFO L226 Difference]: Without dead ends: 55 [2022-07-20 06:11:28,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-07-20 06:11:28,621 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 140 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:11:28,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 129 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 140 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-07-20 06:11:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-20 06:11:28,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2022-07-20 06:11:28,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-07-20 06:11:28,626 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 16 [2022-07-20 06:11:28,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:11:28,626 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-07-20 06:11:28,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:28,626 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-07-20 06:11:28,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 06:11:28,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:28,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:28,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 06:11:28,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:11:28,846 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:28,847 INFO L85 PathProgramCache]: Analyzing trace with hash 247348413, now seen corresponding path program 1 times [2022-07-20 06:11:28,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:11:28,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539565685] [2022-07-20 06:11:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:28,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:11:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 06:11:28,871 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-20 06:11:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 06:11:28,896 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-20 06:11:28,901 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-20 06:11:28,902 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (15 of 16 remaining) [2022-07-20 06:11:28,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2022-07-20 06:11:28,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2022-07-20 06:11:28,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2022-07-20 06:11:28,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2022-07-20 06:11:28,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2022-07-20 06:11:28,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2022-07-20 06:11:28,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2022-07-20 06:11:28,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2022-07-20 06:11:28,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2022-07-20 06:11:28,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2022-07-20 06:11:28,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2022-07-20 06:11:28,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2022-07-20 06:11:28,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (2 of 16 remaining) [2022-07-20 06:11:28,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2022-07-20 06:11:28,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2022-07-20 06:11:28,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 06:11:28,908 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:28,910 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-20 06:11:28,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:11:28 BoogieIcfgContainer [2022-07-20 06:11:28,923 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-20 06:11:28,924 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-20 06:11:28,924 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-20 06:11:28,924 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-20 06:11:28,924 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:11:26" (3/4) ... [2022-07-20 06:11:28,926 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-20 06:11:28,926 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-20 06:11:28,927 INFO L158 Benchmark]: Toolchain (without parser) took 3296.49ms. Allocated memory was 115.3MB in the beginning and 144.7MB in the end (delta: 29.4MB). Free memory was 85.2MB in the beginning and 109.5MB in the end (delta: -24.3MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. [2022-07-20 06:11:28,927 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 81.8MB. Free memory was 36.5MB in the beginning and 36.4MB in the end (delta: 36.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 06:11:28,927 INFO L158 Benchmark]: CACSL2BoogieTranslator took 418.71ms. Allocated memory is still 115.3MB. Free memory was 84.9MB in the beginning and 84.8MB in the end (delta: 62.5kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-20 06:11:28,927 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.45ms. Allocated memory is still 115.3MB. Free memory was 84.8MB in the beginning and 83.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-20 06:11:28,928 INFO L158 Benchmark]: Boogie Preprocessor took 24.19ms. Allocated memory is still 115.3MB. Free memory was 83.2MB in the beginning and 81.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 06:11:28,928 INFO L158 Benchmark]: RCFGBuilder took 275.69ms. Allocated memory is still 115.3MB. Free memory was 81.7MB in the beginning and 68.5MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-20 06:11:28,928 INFO L158 Benchmark]: TraceAbstraction took 2524.00ms. Allocated memory was 115.3MB in the beginning and 144.7MB in the end (delta: 29.4MB). Free memory was 68.0MB in the beginning and 109.5MB in the end (delta: -41.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 06:11:28,928 INFO L158 Benchmark]: Witness Printer took 2.69ms. Allocated memory is still 144.7MB. Free memory is still 109.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 06:11:28,929 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 81.8MB. Free memory was 36.5MB in the beginning and 36.4MB in the end (delta: 36.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 418.71ms. Allocated memory is still 115.3MB. Free memory was 84.9MB in the beginning and 84.8MB in the end (delta: 62.5kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.45ms. Allocated memory is still 115.3MB. Free memory was 84.8MB in the beginning and 83.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.19ms. Allocated memory is still 115.3MB. Free memory was 83.2MB in the beginning and 81.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 275.69ms. Allocated memory is still 115.3MB. Free memory was 81.7MB in the beginning and 68.5MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 2524.00ms. Allocated memory was 115.3MB in the beginning and 144.7MB in the end (delta: 29.4MB). Free memory was 68.0MB in the beginning and 109.5MB in the end (delta: -41.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.69ms. Allocated memory is still 144.7MB. Free memory is still 109.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={-1:0}, p={-1:0}] [L544] p->n = 0 VAL [a={-1:0}, p={-1:0}] [L545] p = a VAL [a={-1:0}, p={-1:0}] [L546] COND TRUE p!=0 VAL [a={-1:0}, p={-1:0}] [L547] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n VAL [a={-1:0}, p={-1:0}, p->n={0:0}] [L550] p = p->n [L546] COND FALSE !(p!=0) VAL [a={-1:0}, p={0:0}] [L552] return 0; VAL [\result=0, a={-1:0}, p={0:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 46 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 2.5s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 475 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 475 mSDsluCounter, 558 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 17 IncrementalHoareTripleChecker+Unchecked, 342 mSDsCounter, 85 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 578 IncrementalHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 85 mSolverCounterUnsat, 216 mSDtfsCounter, 578 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=5, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 98 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 113 ConstructedInterpolants, 1 QuantifiedInterpolants, 873 SizeOfPredicates, 10 NumberOfNonLiveVariables, 102 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 7/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-20 06:11:28,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/list-properties/simple-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 06:11:30,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 06:11:30,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 06:11:30,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 06:11:30,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 06:11:30,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 06:11:30,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 06:11:30,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 06:11:30,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 06:11:30,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 06:11:30,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 06:11:30,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 06:11:30,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 06:11:30,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 06:11:30,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 06:11:30,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 06:11:30,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 06:11:30,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 06:11:30,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 06:11:30,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 06:11:30,672 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 06:11:30,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 06:11:30,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 06:11:30,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 06:11:30,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 06:11:30,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 06:11:30,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 06:11:30,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 06:11:30,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 06:11:30,683 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 06:11:30,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 06:11:30,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 06:11:30,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 06:11:30,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 06:11:30,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 06:11:30,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 06:11:30,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 06:11:30,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 06:11:30,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 06:11:30,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 06:11:30,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 06:11:30,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 06:11:30,693 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-20 06:11:30,717 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 06:11:30,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 06:11:30,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 06:11:30,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 06:11:30,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 06:11:30,719 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 06:11:30,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 06:11:30,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 06:11:30,720 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 06:11:30,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 06:11:30,721 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 06:11:30,721 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 06:11:30,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 06:11:30,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 06:11:30,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 06:11:30,722 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 06:11:30,722 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 06:11:30,722 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 06:11:30,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 06:11:30,722 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 06:11:30,722 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-20 06:11:30,722 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-20 06:11:30,723 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 06:11:30,723 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 06:11:30,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 06:11:30,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 06:11:30,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 06:11:30,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:11:30,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 06:11:30,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 06:11:30,724 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-20 06:11:30,724 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-20 06:11:30,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-20 06:11:30,724 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2022-07-20 06:11:30,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 06:11:30,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 06:11:30,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 06:11:30,995 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 06:11:30,996 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 06:11:30,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-2.i [2022-07-20 06:11:31,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bbf9759/754d887fce144b28a86acdcdf380ef27/FLAGd1fe20502 [2022-07-20 06:11:31,472 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 06:11:31,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i [2022-07-20 06:11:31,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bbf9759/754d887fce144b28a86acdcdf380ef27/FLAGd1fe20502 [2022-07-20 06:11:31,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bbf9759/754d887fce144b28a86acdcdf380ef27 [2022-07-20 06:11:31,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 06:11:31,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 06:11:31,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 06:11:31,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 06:11:31,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 06:11:31,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:11:31" (1/1) ... [2022-07-20 06:11:31,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e8ae5ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:31, skipping insertion in model container [2022-07-20 06:11:31,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:11:31" (1/1) ... [2022-07-20 06:11:31,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 06:11:31,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 06:11:31,790 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2022-07-20 06:11:31,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:11:31,803 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 06:11:31,835 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2022-07-20 06:11:31,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:11:31,871 INFO L208 MainTranslator]: Completed translation [2022-07-20 06:11:31,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:31 WrapperNode [2022-07-20 06:11:31,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 06:11:31,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 06:11:31,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 06:11:31,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 06:11:31,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:31" (1/1) ... [2022-07-20 06:11:31,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:31" (1/1) ... [2022-07-20 06:11:31,922 INFO L137 Inliner]: procedures = 127, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2022-07-20 06:11:31,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 06:11:31,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 06:11:31,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 06:11:31,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 06:11:31,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:31" (1/1) ... [2022-07-20 06:11:31,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:31" (1/1) ... [2022-07-20 06:11:31,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:31" (1/1) ... [2022-07-20 06:11:31,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:31" (1/1) ... [2022-07-20 06:11:31,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:31" (1/1) ... [2022-07-20 06:11:31,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:31" (1/1) ... [2022-07-20 06:11:31,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:31" (1/1) ... [2022-07-20 06:11:31,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 06:11:31,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 06:11:31,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 06:11:31,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 06:11:31,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:31" (1/1) ... [2022-07-20 06:11:31,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:11:31,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:11:31,991 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) [2022-07-20 06:11:32,017 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 [2022-07-20 06:11:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-07-20 06:11:32,034 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-07-20 06:11:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-20 06:11:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 06:11:32,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 06:11:32,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 06:11:32,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 06:11:32,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-20 06:11:32,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-20 06:11:32,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 06:11:32,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 06:11:32,135 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 06:11:32,137 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 06:11:32,181 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-07-20 06:11:32,339 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 06:11:32,343 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 06:11:32,343 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 06:11:32,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:11:32 BoogieIcfgContainer [2022-07-20 06:11:32,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 06:11:32,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 06:11:32,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 06:11:32,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 06:11:32,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:11:31" (1/3) ... [2022-07-20 06:11:32,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f55f05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:11:32, skipping insertion in model container [2022-07-20 06:11:32,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:31" (2/3) ... [2022-07-20 06:11:32,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f55f05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:11:32, skipping insertion in model container [2022-07-20 06:11:32,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:11:32" (3/3) ... [2022-07-20 06:11:32,350 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2022-07-20 06:11:32,361 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 06:11:32,361 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-07-20 06:11:32,409 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 06:11:32,415 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@78daa04c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2c25558a [2022-07-20 06:11:32,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-07-20 06:11:32,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 25 states have (on average 1.92) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 06:11:32,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:32,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 06:11:32,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:32,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:32,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1037516511, now seen corresponding path program 1 times [2022-07-20 06:11:32,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:11:32,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462223315] [2022-07-20 06:11:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:32,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:11:32,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:11:32,453 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:11:32,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-20 06:11:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:32,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 06:11:32,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:11:32,594 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 [2022-07-20 06:11:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:32,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:11:32,656 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:11:32,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462223315] [2022-07-20 06:11:32,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462223315] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:11:32,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:11:32,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:11:32,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098211430] [2022-07-20 06:11:32,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:11:32,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:11:32,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:11:32,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:11:32,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:11:32,684 INFO L87 Difference]: Start difference. First operand has 44 states, 25 states have (on average 1.92) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 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 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:32,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:11:32,849 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-07-20 06:11:32,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:11:32,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-20 06:11:32,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:11:32,855 INFO L225 Difference]: With dead ends: 74 [2022-07-20 06:11:32,855 INFO L226 Difference]: Without dead ends: 65 [2022-07-20 06:11:32,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:11:32,858 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 94 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:11:32,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 34 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:11:32,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-20 06:11:32,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2022-07-20 06:11:32,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 49 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) [2022-07-20 06:11:32,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2022-07-20 06:11:32,880 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 6 [2022-07-20 06:11:32,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:11:32,881 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2022-07-20 06:11:32,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2022-07-20 06:11:32,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 06:11:32,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:32,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 06:11:32,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-20 06:11:33,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:11:33,083 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:33,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:33,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1037516510, now seen corresponding path program 1 times [2022-07-20 06:11:33,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:11:33,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873710031] [2022-07-20 06:11:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:33,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:11:33,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:11:33,086 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:11:33,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-20 06:11:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:33,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 06:11:33,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:11:33,139 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 [2022-07-20 06:11:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:33,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:11:33,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:11:33,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873710031] [2022-07-20 06:11:33,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873710031] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:11:33,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:11:33,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:11:33,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798003936] [2022-07-20 06:11:33,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:11:33,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:11:33,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:11:33,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:11:33,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:11:33,154 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:33,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:11:33,232 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-07-20 06:11:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:11:33,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-20 06:11:33,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:11:33,234 INFO L225 Difference]: With dead ends: 49 [2022-07-20 06:11:33,234 INFO L226 Difference]: Without dead ends: 49 [2022-07-20 06:11:33,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:11:33,235 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:11:33,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 17 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:11:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-20 06:11:33,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-07-20 06:11:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-07-20 06:11:33,239 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 6 [2022-07-20 06:11:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:11:33,239 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-07-20 06:11:33,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:33,240 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-07-20 06:11:33,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 06:11:33,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:33,240 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:33,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-20 06:11:33,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:11:33,447 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:33,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:33,447 INFO L85 PathProgramCache]: Analyzing trace with hash 417959389, now seen corresponding path program 1 times [2022-07-20 06:11:33,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:11:33,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993304238] [2022-07-20 06:11:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:33,448 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:11:33,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:11:33,449 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:11:33,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-20 06:11:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:33,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 06:11:33,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:11:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:33,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:11:33,522 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:11:33,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993304238] [2022-07-20 06:11:33,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993304238] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:11:33,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:11:33,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:11:33,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70368242] [2022-07-20 06:11:33,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:11:33,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:11:33,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:11:33,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:11:33,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:11:33,524 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:33,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:11:33,606 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-07-20 06:11:33,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:11:33,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 06:11:33,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:11:33,607 INFO L225 Difference]: With dead ends: 51 [2022-07-20 06:11:33,608 INFO L226 Difference]: Without dead ends: 51 [2022-07-20 06:11:33,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:11:33,609 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:11:33,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 35 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:11:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-20 06:11:33,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-07-20 06:11:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 45 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-07-20 06:11:33,612 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 11 [2022-07-20 06:11:33,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:11:33,613 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-07-20 06:11:33,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-07-20 06:11:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 06:11:33,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:33,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:33,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-20 06:11:33,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:11:33,820 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:33,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:33,821 INFO L85 PathProgramCache]: Analyzing trace with hash 71880067, now seen corresponding path program 1 times [2022-07-20 06:11:33,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:11:33,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061541725] [2022-07-20 06:11:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:33,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:11:33,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:11:33,823 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:11:33,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-20 06:11:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:33,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 06:11:33,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:11:33,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:11:33,952 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-20 06:11:33,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:11:33,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:11:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:33,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:11:33,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:11:33,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061541725] [2022-07-20 06:11:33,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061541725] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:11:33,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:11:33,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 06:11:33,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805625797] [2022-07-20 06:11:33,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:11:33,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:11:33,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:11:33,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:11:33,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:11:33,994 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:34,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:11:34,171 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2022-07-20 06:11:34,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:11:34,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-20 06:11:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:11:34,173 INFO L225 Difference]: With dead ends: 82 [2022-07-20 06:11:34,173 INFO L226 Difference]: Without dead ends: 82 [2022-07-20 06:11:34,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:11:34,174 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:11:34,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 91 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:11:34,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-20 06:11:34,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 50. [2022-07-20 06:11:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.394736842105263) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-07-20 06:11:34,178 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 12 [2022-07-20 06:11:34,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:11:34,178 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-07-20 06:11:34,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:34,178 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-07-20 06:11:34,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 06:11:34,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:34,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:34,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-20 06:11:34,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:11:34,383 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1327769707, now seen corresponding path program 1 times [2022-07-20 06:11:34,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:11:34,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129331087] [2022-07-20 06:11:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:34,385 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:11:34,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:11:34,387 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:11:34,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-20 06:11:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:34,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 06:11:34,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:11:34,463 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 [2022-07-20 06:11:34,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:11:34,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:11:34,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-20 06:11:34,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:11:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:34,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:11:34,566 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:11:34,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129331087] [2022-07-20 06:11:34,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129331087] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:11:34,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:11:34,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:11:34,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215453509] [2022-07-20 06:11:34,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:11:34,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:11:34,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:11:34,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:11:34,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:11:34,578 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:34,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:11:34,836 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2022-07-20 06:11:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:11:34,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-20 06:11:34,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:11:34,838 INFO L225 Difference]: With dead ends: 60 [2022-07-20 06:11:34,838 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 06:11:34,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-20 06:11:34,839 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:11:34,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 103 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:11:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 06:11:34,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2022-07-20 06:11:34,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-07-20 06:11:34,842 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 13 [2022-07-20 06:11:34,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:11:34,843 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-07-20 06:11:34,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:34,843 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-07-20 06:11:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 06:11:34,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:34,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:34,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-20 06:11:35,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:11:35,044 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:35,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:35,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1327769708, now seen corresponding path program 1 times [2022-07-20 06:11:35,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:11:35,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271274671] [2022-07-20 06:11:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:35,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:11:35,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:11:35,047 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:11:35,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-20 06:11:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:35,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 06:11:35,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:11:35,123 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 [2022-07-20 06:11:35,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:11:35,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-20 06:11:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:35,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:11:35,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:11:35,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271274671] [2022-07-20 06:11:35,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271274671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:11:35,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:11:35,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:11:35,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448752558] [2022-07-20 06:11:35,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:11:35,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:11:35,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:11:35,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:11:35,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:11:35,181 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:35,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:11:35,354 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-07-20 06:11:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:11:35,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-20 06:11:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:11:35,355 INFO L225 Difference]: With dead ends: 54 [2022-07-20 06:11:35,355 INFO L226 Difference]: Without dead ends: 54 [2022-07-20 06:11:35,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:11:35,356 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:11:35,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 85 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:11:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-20 06:11:35,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2022-07-20 06:11:35,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:35,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-07-20 06:11:35,358 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 13 [2022-07-20 06:11:35,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:11:35,358 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-07-20 06:11:35,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:35,359 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-07-20 06:11:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 06:11:35,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:35,359 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:35,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-20 06:11:35,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:11:35,565 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:35,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1804762195, now seen corresponding path program 1 times [2022-07-20 06:11:35,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:11:35,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140716112] [2022-07-20 06:11:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:35,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:11:35,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:11:35,567 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:11:35,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-20 06:11:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:11:35,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 06:11:35,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:11:35,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:11:35,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:11:35,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:11:35,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 06:11:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:35,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:11:35,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-07-20 06:11:35,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:11:35,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:11:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:11:35,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:11:35,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140716112] [2022-07-20 06:11:35,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140716112] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:11:35,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:11:35,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-20 06:11:35,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219814118] [2022-07-20 06:11:35,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:11:35,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:11:35,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:11:35,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:11:35,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:11:35,824 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:37,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:11:37,439 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2022-07-20 06:11:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:11:37,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-20 06:11:37,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:11:37,441 INFO L225 Difference]: With dead ends: 53 [2022-07-20 06:11:37,441 INFO L226 Difference]: Without dead ends: 53 [2022-07-20 06:11:37,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:11:37,441 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:11:37,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 79 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:11:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-20 06:11:37,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2022-07-20 06:11:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:37,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-07-20 06:11:37,444 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2022-07-20 06:11:37,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:11:37,444 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-07-20 06:11:37,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:11:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-07-20 06:11:37,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 06:11:37,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:11:37,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:37,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-20 06:11:37,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:11:37,653 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-07-20 06:11:37,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:11:37,653 INFO L85 PathProgramCache]: Analyzing trace with hash -113054509, now seen corresponding path program 1 times [2022-07-20 06:11:37,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:11:37,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131808103] [2022-07-20 06:11:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:11:37,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:11:37,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:11:37,655 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:11:37,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-20 06:11:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 06:11:37,713 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-20 06:11:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 06:11:37,752 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-07-20 06:11:37,752 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-20 06:11:37,753 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (15 of 16 remaining) [2022-07-20 06:11:37,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2022-07-20 06:11:37,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2022-07-20 06:11:37,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2022-07-20 06:11:37,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2022-07-20 06:11:37,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2022-07-20 06:11:37,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2022-07-20 06:11:37,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2022-07-20 06:11:37,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2022-07-20 06:11:37,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2022-07-20 06:11:37,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2022-07-20 06:11:37,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2022-07-20 06:11:37,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2022-07-20 06:11:37,757 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (2 of 16 remaining) [2022-07-20 06:11:37,757 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2022-07-20 06:11:37,757 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2022-07-20 06:11:37,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-20 06:11:37,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:11:37,960 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:11:37,963 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-20 06:11:37,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:11:37 BoogieIcfgContainer [2022-07-20 06:11:37,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-20 06:11:37,977 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-20 06:11:37,977 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-20 06:11:37,977 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-20 06:11:37,978 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:11:32" (3/4) ... [2022-07-20 06:11:37,980 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-20 06:11:37,980 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-20 06:11:37,980 INFO L158 Benchmark]: Toolchain (without parser) took 6484.33ms. Allocated memory was 56.6MB in the beginning and 88.1MB in the end (delta: 31.5MB). Free memory was 34.1MB in the beginning and 60.4MB in the end (delta: -26.2MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2022-07-20 06:11:37,980 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 56.6MB. Free memory is still 38.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 06:11:37,995 INFO L158 Benchmark]: CACSL2BoogieTranslator took 366.89ms. Allocated memory is still 56.6MB. Free memory was 33.9MB in the beginning and 32.3MB in the end (delta: 1.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-20 06:11:37,995 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.82ms. Allocated memory is still 56.6MB. Free memory was 32.3MB in the beginning and 30.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-20 06:11:37,996 INFO L158 Benchmark]: Boogie Preprocessor took 42.04ms. Allocated memory is still 56.6MB. Free memory was 30.5MB in the beginning and 28.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 06:11:37,996 INFO L158 Benchmark]: RCFGBuilder took 378.44ms. Allocated memory was 56.6MB in the beginning and 73.4MB in the end (delta: 16.8MB). Free memory was 28.9MB in the beginning and 45.1MB in the end (delta: -16.2MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2022-07-20 06:11:37,996 INFO L158 Benchmark]: TraceAbstraction took 5631.14ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 44.6MB in the beginning and 60.4MB in the end (delta: -15.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 06:11:37,996 INFO L158 Benchmark]: Witness Printer took 2.41ms. Allocated memory is still 88.1MB. Free memory is still 60.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 06:11:37,997 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 56.6MB. Free memory is still 38.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 366.89ms. Allocated memory is still 56.6MB. Free memory was 33.9MB in the beginning and 32.3MB in the end (delta: 1.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.82ms. Allocated memory is still 56.6MB. Free memory was 32.3MB in the beginning and 30.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.04ms. Allocated memory is still 56.6MB. Free memory was 30.5MB in the beginning and 28.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 378.44ms. Allocated memory was 56.6MB in the beginning and 73.4MB in the end (delta: 16.8MB). Free memory was 28.9MB in the beginning and 45.1MB in the end (delta: -16.2MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * TraceAbstraction took 5631.14ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 44.6MB in the beginning and 60.4MB in the end (delta: -15.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.41ms. Allocated memory is still 88.1MB. Free memory is still 60.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={6:0}] [L534] List t; [L535] List p = a; VAL [a={6:0}, p={6:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={6:0}, p={6:0}] [L544] p->n = 0 VAL [a={6:0}, p={6:0}] [L545] p = a VAL [a={6:0}, p={6:0}] [L546] COND TRUE p!=0 VAL [a={6:0}, p={6:0}] [L547] EXPR p->h VAL [a={6:0}, p={6:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n VAL [a={6:0}, p={6:0}, p->n={0:0}] [L550] p = p->n [L546] COND FALSE !(p!=0) VAL [a={6:0}, p={0:0}] [L552] return 0; VAL [\result=0, a={6:0}, p={0:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 45 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 5.6s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 367 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 367 mSDsluCounter, 444 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 277 mSDsCounter, 72 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 527 IncrementalHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 72 mSolverCounterUnsat, 167 mSDtfsCounter, 527 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=1, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 102 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 83 ConstructedInterpolants, 0 QuantifiedInterpolants, 527 SizeOfPredicates, 31 NumberOfNonLiveVariables, 387 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 4/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-20 06:11:38,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample