./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-examples/sanfoundry_24-2.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/array-examples/sanfoundry_24-2.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 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:30:19,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:30:19,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:30:19,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:30:19,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:30:19,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:30:19,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:30:19,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:30:19,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:30:19,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:30:19,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:30:19,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:30:19,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:30:19,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:30:19,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:30:19,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:30:19,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:30:19,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:30:19,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:30:19,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:30:19,068 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:30:19,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:30:19,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:30:19,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:30:19,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:30:19,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:30:19,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:30:19,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:30:19,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:30:19,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:30:19,082 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:30:19,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:30:19,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:30:19,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:30:19,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:30:19,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:30:19,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:30:19,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:30:19,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:30:19,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:30:19,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:30:19,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:30:19,089 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:30:19,113 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:30:19,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:30:19,114 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:30:19,114 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:30:19,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:30:19,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:30:19,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:30:19,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:30:19,115 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:30:19,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:30:19,116 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:30:19,116 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:30:19,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:30:19,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:30:19,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:30:19,117 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:30:19,117 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:30:19,117 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:30:19,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:30:19,117 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:30:19,118 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:30:19,118 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:30:19,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:30:19,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:30:19,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:30:19,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:30:19,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:30:19,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:30:19,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:30:19,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:30:19,119 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa [2022-07-20 05:30:19,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:30:19,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:30:19,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:30:19,312 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:30:19,313 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:30:19,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2022-07-20 05:30:19,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07aee4b09/9e742ae63e094e27b8e469fea3b3d15a/FLAG050240cff [2022-07-20 05:30:19,786 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:30:19,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2022-07-20 05:30:19,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07aee4b09/9e742ae63e094e27b8e469fea3b3d15a/FLAG050240cff [2022-07-20 05:30:19,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07aee4b09/9e742ae63e094e27b8e469fea3b3d15a [2022-07-20 05:30:19,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:30:19,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:30:19,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:30:19,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:30:19,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:30:19,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:30:19" (1/1) ... [2022-07-20 05:30:19,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5756b136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:19, skipping insertion in model container [2022-07-20 05:30:19,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:30:19" (1/1) ... [2022-07-20 05:30:19,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:30:19,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:30:19,912 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/array-examples/sanfoundry_24-2.i[808,821] [2022-07-20 05:30:19,927 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:30:19,931 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:30:19,939 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/array-examples/sanfoundry_24-2.i[808,821] [2022-07-20 05:30:19,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:30:19,952 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:30:19,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:19 WrapperNode [2022-07-20 05:30:19,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:30:19,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:30:19,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:30:19,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:30:19,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:19" (1/1) ... [2022-07-20 05:30:19,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:19" (1/1) ... [2022-07-20 05:30:19,979 INFO L137 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2022-07-20 05:30:19,979 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:30:19,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:30:19,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:30:19,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:30:19,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:19" (1/1) ... [2022-07-20 05:30:19,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:19" (1/1) ... [2022-07-20 05:30:19,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:19" (1/1) ... [2022-07-20 05:30:19,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:19" (1/1) ... [2022-07-20 05:30:19,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:19" (1/1) ... [2022-07-20 05:30:19,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:19" (1/1) ... [2022-07-20 05:30:19,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:19" (1/1) ... [2022-07-20 05:30:19,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:30:19,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:30:19,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:30:19,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:30:19,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:19" (1/1) ... [2022-07-20 05:30:20,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:30:20,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:20,030 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 05:30:20,033 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 05:30:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 05:30:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 05:30:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 05:30:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 05:30:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:30:20,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:30:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 05:30:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-20 05:30:20,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-20 05:30:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:30:20,097 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:30:20,098 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:30:20,252 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:30:20,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:30:20,256 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 05:30:20,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:30:20 BoogieIcfgContainer [2022-07-20 05:30:20,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:30:20,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:30:20,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:30:20,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:30:20,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:30:19" (1/3) ... [2022-07-20 05:30:20,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695d6c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:30:20, skipping insertion in model container [2022-07-20 05:30:20,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:19" (2/3) ... [2022-07-20 05:30:20,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695d6c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:30:20, skipping insertion in model container [2022-07-20 05:30:20,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:30:20" (3/3) ... [2022-07-20 05:30:20,263 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-2.i [2022-07-20 05:30:20,281 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:30:20,281 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-07-20 05:30:20,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:30:20,321 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@dd73811, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@395cd0a [2022-07-20 05:30:20,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-07-20 05:30:20,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 05:30:20,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-20 05:30:20,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:20,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-20 05:30:20,331 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-20 05:30:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:20,335 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-07-20 05:30:20,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:20,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593751286] [2022-07-20 05:30:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:20,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:20,456 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 05:30:20,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:20,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593751286] [2022-07-20 05:30:20,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593751286] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:30:20,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:30:20,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:30:20,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748100816] [2022-07-20 05:30:20,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:30:20,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:30:20,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:20,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:30:20,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:30:20,497 INFO L87 Difference]: Start difference. First operand has 45 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states 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 05:30:20,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:20,540 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-07-20 05:30:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:30:20,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-07-20 05:30:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:20,551 INFO L225 Difference]: With dead ends: 40 [2022-07-20 05:30:20,551 INFO L226 Difference]: Without dead ends: 38 [2022-07-20 05:30:20,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:30:20,561 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 29 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:20,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:30:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-20 05:30:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-20 05:30:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 34 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 05:30:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-07-20 05:30:20,597 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 4 [2022-07-20 05:30:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:20,597 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-07-20 05:30:20,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states 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 05:30:20,598 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-07-20 05:30:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-20 05:30:20,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:20,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-20 05:30:20,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 05:30:20,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-20 05:30:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:20,600 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-07-20 05:30:20,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:20,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046581431] [2022-07-20 05:30:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:20,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:20,682 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 05:30:20,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:20,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046581431] [2022-07-20 05:30:20,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046581431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:30:20,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:30:20,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:30:20,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794098855] [2022-07-20 05:30:20,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:30:20,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:30:20,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:20,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:30:20,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:30:20,684 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states 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 05:30:20,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:20,736 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-07-20 05:30:20,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:30:20,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-07-20 05:30:20,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:20,737 INFO L225 Difference]: With dead ends: 61 [2022-07-20 05:30:20,737 INFO L226 Difference]: Without dead ends: 61 [2022-07-20 05:30:20,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:30:20,738 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:20,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 47 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:30:20,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-20 05:30:20,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2022-07-20 05:30:20,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.4) internal successors, (56), 46 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 05:30:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-20 05:30:20,747 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 4 [2022-07-20 05:30:20,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:20,748 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-20 05:30:20,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states 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 05:30:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-20 05:30:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 05:30:20,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:20,749 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:20,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 05:30:20,749 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-20 05:30:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:20,750 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-07-20 05:30:20,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:20,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847828814] [2022-07-20 05:30:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:20,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:20,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:20,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847828814] [2022-07-20 05:30:20,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847828814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:20,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819410925] [2022-07-20 05:30:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:20,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:20,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:20,839 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 05:30:20,840 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 05:30:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:20,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 05:30:20,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:20,951 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 05:30:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:21,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:30:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:21,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819410925] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:30:21,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:30:21,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-07-20 05:30:21,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493597215] [2022-07-20 05:30:21,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:30:21,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 05:30:21,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:21,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 05:30:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:30:21,088 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:21,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:21,258 INFO L93 Difference]: Finished difference Result 123 states and 156 transitions. [2022-07-20 05:30:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:30:21,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-20 05:30:21,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:21,260 INFO L225 Difference]: With dead ends: 123 [2022-07-20 05:30:21,260 INFO L226 Difference]: Without dead ends: 123 [2022-07-20 05:30:21,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:30:21,261 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 127 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:21,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 97 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:30:21,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-20 05:30:21,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2022-07-20 05:30:21,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 90 states have (on average 1.3) internal successors, (117), 94 states have internal predecessors, (117), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 05:30:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2022-07-20 05:30:21,269 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 8 [2022-07-20 05:30:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:21,269 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2022-07-20 05:30:21,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2022-07-20 05:30:21,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:30:21,270 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:21,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:21,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 05:30:21,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:21,487 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-20 05:30:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:21,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1897655597, now seen corresponding path program 1 times [2022-07-20 05:30:21,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:21,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764316215] [2022-07-20 05:30:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:21,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:21,521 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 05:30:21,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:21,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764316215] [2022-07-20 05:30:21,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764316215] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:30:21,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:30:21,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:30:21,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047492337] [2022-07-20 05:30:21,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:30:21,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:30:21,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:21,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:30:21,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:30:21,524 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states 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 05:30:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:21,551 INFO L93 Difference]: Finished difference Result 103 states and 132 transitions. [2022-07-20 05:30:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:30:21,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-20 05:30:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:21,552 INFO L225 Difference]: With dead ends: 103 [2022-07-20 05:30:21,553 INFO L226 Difference]: Without dead ends: 101 [2022-07-20 05:30:21,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:30:21,554 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:21,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 61 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:30:21,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-20 05:30:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-07-20 05:30:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 88 states have (on average 1.25) internal successors, (110), 91 states have internal predecessors, (110), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 05:30:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 126 transitions. [2022-07-20 05:30:21,560 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 126 transitions. Word has length 9 [2022-07-20 05:30:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:21,560 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 126 transitions. [2022-07-20 05:30:21,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states 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 05:30:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 126 transitions. [2022-07-20 05:30:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 05:30:21,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:21,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:21,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 05:30:21,562 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-20 05:30:21,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:21,562 INFO L85 PathProgramCache]: Analyzing trace with hash -290279188, now seen corresponding path program 1 times [2022-07-20 05:30:21,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:21,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590676253] [2022-07-20 05:30:21,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:21,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:21,595 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 05:30:21,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:21,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590676253] [2022-07-20 05:30:21,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590676253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:30:21,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:30:21,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:30:21,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729250070] [2022-07-20 05:30:21,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:30:21,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:30:21,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:21,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:30:21,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:30:21,600 INFO L87 Difference]: Start difference. First operand 101 states and 126 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:21,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:21,665 INFO L93 Difference]: Finished difference Result 125 states and 153 transitions. [2022-07-20 05:30:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:30:21,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 05:30:21,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:21,668 INFO L225 Difference]: With dead ends: 125 [2022-07-20 05:30:21,668 INFO L226 Difference]: Without dead ends: 119 [2022-07-20 05:30:21,668 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 05:30:21,671 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:21,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 90 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:30:21,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-20 05:30:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2022-07-20 05:30:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 92 states have internal predecessors, (109), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 05:30:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2022-07-20 05:30:21,690 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 13 [2022-07-20 05:30:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:21,690 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2022-07-20 05:30:21,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2022-07-20 05:30:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 05:30:21,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:21,691 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:21,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 05:30:21,691 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-20 05:30:21,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:21,692 INFO L85 PathProgramCache]: Analyzing trace with hash -144029224, now seen corresponding path program 1 times [2022-07-20 05:30:21,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:21,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196507725] [2022-07-20 05:30:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:21,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:30:21,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:21,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196507725] [2022-07-20 05:30:21,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196507725] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:30:21,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:30:21,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:30:21,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040012970] [2022-07-20 05:30:21,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:30:21,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:30:21,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:21,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:30:21,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:30:21,749 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:21,788 INFO L93 Difference]: Finished difference Result 117 states and 144 transitions. [2022-07-20 05:30:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:30:21,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-20 05:30:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:21,790 INFO L225 Difference]: With dead ends: 117 [2022-07-20 05:30:21,790 INFO L226 Difference]: Without dead ends: 117 [2022-07-20 05:30:21,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:30:21,790 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:21,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 41 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:30:21,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-20 05:30:21,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 102. [2022-07-20 05:30:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 92 states have internal predecessors, (109), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 05:30:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2022-07-20 05:30:21,796 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 14 [2022-07-20 05:30:21,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:21,796 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2022-07-20 05:30:21,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2022-07-20 05:30:21,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:30:21,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:21,797 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 05:30:21,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 05:30:21,797 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-20 05:30:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:21,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1116060617, now seen corresponding path program 1 times [2022-07-20 05:30:21,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:21,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412362237] [2022-07-20 05:30:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:21,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:30:21,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:21,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412362237] [2022-07-20 05:30:21,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412362237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:30:21,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:30:21,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 05:30:21,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418502904] [2022-07-20 05:30:21,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:30:21,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 05:30:21,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:21,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 05:30:21,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:30:21,885 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:22,010 INFO L93 Difference]: Finished difference Result 168 states and 205 transitions. [2022-07-20 05:30:22,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:30:22,010 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-20 05:30:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:22,011 INFO L225 Difference]: With dead ends: 168 [2022-07-20 05:30:22,011 INFO L226 Difference]: Without dead ends: 168 [2022-07-20 05:30:22,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:30:22,012 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 27 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:22,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 243 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:30:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-20 05:30:22,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 106. [2022-07-20 05:30:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 95 states have internal predecessors, (112), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 05:30:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2022-07-20 05:30:22,018 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 17 [2022-07-20 05:30:22,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:22,018 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2022-07-20 05:30:22,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:22,018 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2022-07-20 05:30:22,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 05:30:22,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:22,019 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:22,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 05:30:22,019 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-20 05:30:22,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:22,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1123657531, now seen corresponding path program 1 times [2022-07-20 05:30:22,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:22,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696550429] [2022-07-20 05:30:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:22,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:30:22,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:22,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696550429] [2022-07-20 05:30:22,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696550429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:22,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447216376] [2022-07-20 05:30:22,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:22,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:22,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:22,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:30:22,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 05:30:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:22,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 05:30:22,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:22,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:30:22,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-07-20 05:30:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:22,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447216376] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:30:22,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:30:22,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2022-07-20 05:30:22,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768760850] [2022-07-20 05:30:22,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:30:22,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 05:30:22,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:22,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 05:30:22,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-07-20 05:30:22,371 INFO L87 Difference]: Start difference. First operand 106 states and 128 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:22,569 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2022-07-20 05:30:22,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:30:22,569 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-20 05:30:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:22,570 INFO L225 Difference]: With dead ends: 162 [2022-07-20 05:30:22,570 INFO L226 Difference]: Without dead ends: 162 [2022-07-20 05:30:22,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:30:22,571 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 434 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:22,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 128 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:30:22,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-20 05:30:22,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 103. [2022-07-20 05:30:22,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 92 states have internal predecessors, (109), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-20 05:30:22,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions. [2022-07-20 05:30:22,576 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 18 [2022-07-20 05:30:22,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:22,576 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 125 transitions. [2022-07-20 05:30:22,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:22,576 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions. [2022-07-20 05:30:22,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 05:30:22,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:22,577 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-07-20 05:30:22,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 05:30:22,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-20 05:30:22,793 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-20 05:30:22,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:22,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-07-20 05:30:22,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:22,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824777579] [2022-07-20 05:30:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:22,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:22,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:22,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824777579] [2022-07-20 05:30:22,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824777579] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:22,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386263192] [2022-07-20 05:30:22,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:30:22,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:22,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:22,914 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:30:22,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 05:30:22,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:30:22,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:30:22,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 05:30:22,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:22,956 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 05:30:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:23,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:30:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:23,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386263192] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:30:23,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:30:23,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-07-20 05:30:23,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536867786] [2022-07-20 05:30:23,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:30:23,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 05:30:23,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:23,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 05:30:23,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:30:23,227 INFO L87 Difference]: Start difference. First operand 103 states and 125 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:23,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:23,858 INFO L93 Difference]: Finished difference Result 293 states and 366 transitions. [2022-07-20 05:30:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:30:23,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-20 05:30:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:23,859 INFO L225 Difference]: With dead ends: 293 [2022-07-20 05:30:23,860 INFO L226 Difference]: Without dead ends: 293 [2022-07-20 05:30:23,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:30:23,860 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 340 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:23,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 533 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 05:30:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-07-20 05:30:23,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 226. [2022-07-20 05:30:23,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 200 states have (on average 1.22) internal successors, (244), 203 states have internal predecessors, (244), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-20 05:30:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 284 transitions. [2022-07-20 05:30:23,867 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 284 transitions. Word has length 20 [2022-07-20 05:30:23,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:23,867 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 284 transitions. [2022-07-20 05:30:23,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 284 transitions. [2022-07-20 05:30:23,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-20 05:30:23,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:23,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:23,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-20 05:30:24,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:24,086 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-20 05:30:24,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:24,086 INFO L85 PathProgramCache]: Analyzing trace with hash -541087126, now seen corresponding path program 1 times [2022-07-20 05:30:24,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:24,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254678241] [2022-07-20 05:30:24,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:24,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:30:24,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:24,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254678241] [2022-07-20 05:30:24,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254678241] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:30:24,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:30:24,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-20 05:30:24,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65923677] [2022-07-20 05:30:24,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:30:24,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 05:30:24,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:24,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 05:30:24,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:30:24,167 INFO L87 Difference]: Start difference. First operand 226 states and 284 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:24,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:24,265 INFO L93 Difference]: Finished difference Result 291 states and 358 transitions. [2022-07-20 05:30:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:30:24,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-20 05:30:24,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:24,266 INFO L225 Difference]: With dead ends: 291 [2022-07-20 05:30:24,267 INFO L226 Difference]: Without dead ends: 291 [2022-07-20 05:30:24,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:30:24,267 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:24,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 181 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:30:24,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-07-20 05:30:24,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 224. [2022-07-20 05:30:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 199 states have (on average 1.2160804020100502) internal successors, (242), 201 states have internal predecessors, (242), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-20 05:30:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 282 transitions. [2022-07-20 05:30:24,284 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 282 transitions. Word has length 23 [2022-07-20 05:30:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:24,285 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 282 transitions. [2022-07-20 05:30:24,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 282 transitions. [2022-07-20 05:30:24,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 05:30:24,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:24,291 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-20 05:30:24,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 05:30:24,291 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-20 05:30:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:24,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1157298733, now seen corresponding path program 2 times [2022-07-20 05:30:24,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:24,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544981548] [2022-07-20 05:30:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:24,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 05:30:24,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:24,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544981548] [2022-07-20 05:30:24,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544981548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:24,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576033438] [2022-07-20 05:30:24,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:30:24,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:24,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:24,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:30:24,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 05:30:24,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:30:24,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:30:24,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 05:30:24,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-20 05:30:24,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:30:25,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-07-20 05:30:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-20 05:30:25,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576033438] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:30:25,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:30:25,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2022-07-20 05:30:25,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566462783] [2022-07-20 05:30:25,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:30:25,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-20 05:30:25,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:25,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-20 05:30:25,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-07-20 05:30:25,106 INFO L87 Difference]: Start difference. First operand 224 states and 282 transitions. Second operand has 28 states, 27 states have (on average 3.037037037037037) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:25,780 INFO L93 Difference]: Finished difference Result 315 states and 398 transitions. [2022-07-20 05:30:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 05:30:25,780 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.037037037037037) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-20 05:30:25,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:25,781 INFO L225 Difference]: With dead ends: 315 [2022-07-20 05:30:25,781 INFO L226 Difference]: Without dead ends: 45 [2022-07-20 05:30:25,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 05:30:25,782 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 965 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:25,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [965 Valid, 410 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:30:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-20 05:30:25,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-20 05:30:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 05:30:25,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-07-20 05:30:25,783 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2022-07-20 05:30:25,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:25,783 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-07-20 05:30:25,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.037037037037037) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:25,783 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-07-20 05:30:25,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 05:30:25,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:25,783 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1] [2022-07-20 05:30:25,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 05:30:25,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:25,993 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-20 05:30:25,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:25,993 INFO L85 PathProgramCache]: Analyzing trace with hash -256132636, now seen corresponding path program 3 times [2022-07-20 05:30:25,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:25,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214384566] [2022-07-20 05:30:25,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:25,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:26,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:26,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214384566] [2022-07-20 05:30:26,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214384566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:26,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988388161] [2022-07-20 05:30:26,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:30:26,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:26,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:26,208 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:30:26,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 05:30:26,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-20 05:30:26,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:30:26,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 05:30:26,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:26,355 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 05:30:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:26,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:30:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:27,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988388161] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:30:27,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:30:27,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2022-07-20 05:30:27,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801290226] [2022-07-20 05:30:27,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:30:27,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 05:30:27,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:27,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 05:30:27,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=870, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 05:30:27,149 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 35 states, 34 states have (on average 3.823529411764706) internal successors, (130), 35 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:27,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:27,856 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2022-07-20 05:30:27,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 05:30:27,857 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.823529411764706) internal successors, (130), 35 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-20 05:30:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:27,857 INFO L225 Difference]: With dead ends: 93 [2022-07-20 05:30:27,857 INFO L226 Difference]: Without dead ends: 93 [2022-07-20 05:30:27,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=670, Invalid=1310, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 05:30:27,858 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:27,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 174 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:30:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-20 05:30:27,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-07-20 05:30:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-07-20 05:30:27,860 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 44 [2022-07-20 05:30:27,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:27,860 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-07-20 05:30:27,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.823529411764706) internal successors, (130), 35 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-07-20 05:30:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-20 05:30:27,860 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:27,861 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1] [2022-07-20 05:30:27,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 05:30:28,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 05:30:28,061 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-20 05:30:28,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:28,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1667733768, now seen corresponding path program 4 times [2022-07-20 05:30:28,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:28,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463477080] [2022-07-20 05:30:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:28,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:28,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:28,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463477080] [2022-07-20 05:30:28,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463477080] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:28,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882215638] [2022-07-20 05:30:28,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:30:28,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:28,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:28,564 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:30:28,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 05:30:28,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:30:28,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:30:28,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-20 05:30:28,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:28,804 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 05:30:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:29,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:30:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:31,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882215638] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:30:31,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:30:31,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 72 [2022-07-20 05:30:31,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645914230] [2022-07-20 05:30:31,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:30:31,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-20 05:30:31,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:31,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-20 05:30:31,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1274, Invalid=3982, Unknown=0, NotChecked=0, Total=5256 [2022-07-20 05:30:31,406 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 73 states, 72 states have (on average 3.8055555555555554) internal successors, (274), 73 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:34,944 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2022-07-20 05:30:34,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-20 05:30:34,945 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 3.8055555555555554) internal successors, (274), 73 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-07-20 05:30:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:34,946 INFO L225 Difference]: With dead ends: 189 [2022-07-20 05:30:34,946 INFO L226 Difference]: Without dead ends: 189 [2022-07-20 05:30:34,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2837, Invalid=6093, Unknown=0, NotChecked=0, Total=8930 [2022-07-20 05:30:34,949 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 163 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:34,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 797 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 05:30:34,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-20 05:30:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-07-20 05:30:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0053191489361701) internal successors, (189), 188 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:34,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2022-07-20 05:30:34,953 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 92 [2022-07-20 05:30:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:34,954 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2022-07-20 05:30:34,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 3.8055555555555554) internal successors, (274), 73 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2022-07-20 05:30:34,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-20 05:30:34,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:34,956 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1] [2022-07-20 05:30:34,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 05:30:35,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:35,175 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-20 05:30:35,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:35,175 INFO L85 PathProgramCache]: Analyzing trace with hash -78753968, now seen corresponding path program 5 times [2022-07-20 05:30:35,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:35,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122713854] [2022-07-20 05:30:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:35,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:36,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:36,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122713854] [2022-07-20 05:30:36,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122713854] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:36,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413763444] [2022-07-20 05:30:36,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:30:36,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:36,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:36,576 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:30:36,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 05:30:57,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-07-20 05:30:57,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:30:57,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-20 05:30:57,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:57,843 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 05:31:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:31:00,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:31:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:31:03,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413763444] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:31:03,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:31:03,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 141 [2022-07-20 05:31:03,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445752373] [2022-07-20 05:31:03,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:31:03,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-07-20 05:31:03,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:31:03,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-07-20 05:31:03,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4698, Invalid=15324, Unknown=0, NotChecked=0, Total=20022 [2022-07-20 05:31:03,009 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand has 142 states, 141 states have (on average 3.9574468085106385) internal successors, (558), 142 states have internal predecessors, (558), 0 states have call successors, (0), 0 states 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 05:31:15,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:31:15,469 INFO L93 Difference]: Finished difference Result 381 states and 381 transitions. [2022-07-20 05:31:15,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-20 05:31:15,469 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 141 states have (on average 3.9574468085106385) internal successors, (558), 142 states have internal predecessors, (558), 0 states have call successors, (0), 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 188 [2022-07-20 05:31:15,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:31:15,481 INFO L225 Difference]: With dead ends: 381 [2022-07-20 05:31:15,481 INFO L226 Difference]: Without dead ends: 381 [2022-07-20 05:31:15,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10626 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=11230, Invalid=23926, Unknown=0, NotChecked=0, Total=35156 [2022-07-20 05:31:15,486 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 190 mSDsluCounter, 3358 mSDsCounter, 0 mSdLazyCounter, 10385 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 10479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 10385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:31:15,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 3408 Invalid, 10479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 10385 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-20 05:31:15,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-07-20 05:31:15,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2022-07-20 05:31:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.0026315789473683) internal successors, (381), 380 states have internal predecessors, (381), 0 states have call successors, (0), 0 states 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 05:31:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 381 transitions. [2022-07-20 05:31:15,491 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 381 transitions. Word has length 188 [2022-07-20 05:31:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:31:15,491 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 381 transitions. [2022-07-20 05:31:15,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 141 states have (on average 3.9574468085106385) internal successors, (558), 142 states have internal predecessors, (558), 0 states have call successors, (0), 0 states 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 05:31:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 381 transitions. [2022-07-20 05:31:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2022-07-20 05:31:15,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:31:15,494 INFO L195 NwaCegarLoop]: trace histogram [95, 94, 94, 94, 1, 1, 1] [2022-07-20 05:31:15,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-20 05:31:15,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:15,707 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-07-20 05:31:15,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:31:15,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1796709344, now seen corresponding path program 6 times [2022-07-20 05:31:15,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:31:15,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447450663] [2022-07-20 05:31:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:31:15,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:31:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:31:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17672 backedges. 0 proven. 17672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:31:20,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:31:20,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447450663] [2022-07-20 05:31:20,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447450663] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:31:20,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779700229] [2022-07-20 05:31:20,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:31:20,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:20,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:31:20,004 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:31:20,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process