./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 528fbc32d9aa1d8a4eedfd9ab07830e3af97eea6ef37fe4df10e8aa3c9d21936 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 05:50:46,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 05:50:46,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 05:50:46,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 05:50:46,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 05:50:46,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 05:50:46,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 05:50:46,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 05:50:46,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 05:50:46,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 05:50:46,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 05:50:46,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 05:50:46,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 05:50:46,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 05:50:46,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 05:50:46,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 05:50:46,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 05:50:46,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 05:50:46,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 05:50:46,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 05:50:46,820 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 05:50:46,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 05:50:46,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 05:50:46,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 05:50:46,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 05:50:46,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 05:50:46,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 05:50:46,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 05:50:46,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 05:50:46,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 05:50:46,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 05:50:46,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 05:50:46,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 05:50:46,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 05:50:46,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 05:50:46,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 05:50:46,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 05:50:46,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 05:50:46,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 05:50:46,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 05:50:46,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 05:50:46,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 05:50:46,842 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-07-14 05:50:46,869 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 05:50:46,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 05:50:46,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 05:50:46,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 05:50:46,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 05:50:46,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 05:50:46,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 05:50:46,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 05:50:46,872 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 05:50:46,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 05:50:46,873 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 05:50:46,873 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 05:50:46,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 05:50:46,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 05:50:46,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 05:50:46,874 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 05:50:46,874 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 05:50:46,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 05:50:46,875 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 05:50:46,876 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 05:50:46,876 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 05:50:46,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 05:50:46,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 05:50:46,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 05:50:46,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 05:50:46,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 05:50:46,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 05:50:46,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 05:50:46,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 05:50:46,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 528fbc32d9aa1d8a4eedfd9ab07830e3af97eea6ef37fe4df10e8aa3c9d21936 [2022-07-14 05:50:47,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 05:50:47,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 05:50:47,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 05:50:47,144 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 05:50:47,145 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 05:50:47,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2022-07-14 05:50:47,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37fd05455/9340cd42d6e34061aa216fa098e34140/FLAG7207ae098 [2022-07-14 05:50:47,686 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 05:50:47,686 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2022-07-14 05:50:47,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37fd05455/9340cd42d6e34061aa216fa098e34140/FLAG7207ae098 [2022-07-14 05:50:48,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37fd05455/9340cd42d6e34061aa216fa098e34140 [2022-07-14 05:50:48,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 05:50:48,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 05:50:48,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 05:50:48,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 05:50:48,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 05:50:48,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 05:50:48" (1/1) ... [2022-07-14 05:50:48,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e0a3976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:50:48, skipping insertion in model container [2022-07-14 05:50:48,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 05:50:48" (1/1) ... [2022-07-14 05:50:48,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 05:50:48,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 05:50:48,316 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i[23818,23831] [2022-07-14 05:50:48,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 05:50:48,328 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 05:50:48,366 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i[23818,23831] [2022-07-14 05:50:48,367 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 05:50:48,391 INFO L208 MainTranslator]: Completed translation [2022-07-14 05:50:48,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:50:48 WrapperNode [2022-07-14 05:50:48,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 05:50:48,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 05:50:48,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 05:50:48,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 05:50:48,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:50:48" (1/1) ... [2022-07-14 05:50:48,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:50:48" (1/1) ... [2022-07-14 05:50:48,451 INFO L137 Inliner]: procedures = 125, calls = 15, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 90 [2022-07-14 05:50:48,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 05:50:48,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 05:50:48,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 05:50:48,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 05:50:48,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:50:48" (1/1) ... [2022-07-14 05:50:48,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:50:48" (1/1) ... [2022-07-14 05:50:48,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:50:48" (1/1) ... [2022-07-14 05:50:48,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:50:48" (1/1) ... [2022-07-14 05:50:48,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:50:48" (1/1) ... [2022-07-14 05:50:48,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:50:48" (1/1) ... [2022-07-14 05:50:48,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:50:48" (1/1) ... [2022-07-14 05:50:48,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 05:50:48,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 05:50:48,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 05:50:48,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 05:50:48,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:50:48" (1/1) ... [2022-07-14 05:50:48,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 05:50:48,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:50:48,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 05:50:48,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 05:50:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 05:50:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 05:50:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 05:50:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 05:50:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 05:50:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-14 05:50:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 05:50:48,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 05:50:48,725 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 05:50:48,727 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 05:50:48,899 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 05:50:48,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 05:50:48,904 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-14 05:50:48,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 05:50:48 BoogieIcfgContainer [2022-07-14 05:50:48,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 05:50:48,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 05:50:48,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 05:50:48,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 05:50:48,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 05:50:48" (1/3) ... [2022-07-14 05:50:48,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3a9095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 05:50:48, skipping insertion in model container [2022-07-14 05:50:48,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:50:48" (2/3) ... [2022-07-14 05:50:48,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3a9095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 05:50:48, skipping insertion in model container [2022-07-14 05:50:48,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 05:50:48" (3/3) ... [2022-07-14 05:50:48,913 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2022-07-14 05:50:48,924 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 05:50:48,925 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-07-14 05:50:48,971 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 05:50:48,978 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@4502784c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f71cc1d [2022-07-14 05:50:48,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-07-14 05:50:48,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:48,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 05:50:48,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:50:49,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:50:49,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:50:49,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:50:49,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1819225437, now seen corresponding path program 1 times [2022-07-14 05:50:49,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:50:49,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772419813] [2022-07-14 05:50:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:49,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:50:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:50:49,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:50:49,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772419813] [2022-07-14 05:50:49,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772419813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:50:49,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:50:49,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 05:50:49,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426840928] [2022-07-14 05:50:49,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:50:49,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-14 05:50:49,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:50:49,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-14 05:50:49,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-14 05:50:49,169 INFO L87 Difference]: Start difference. First operand has 41 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:49,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:50:49,182 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-07-14 05:50:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-14 05:50:49,184 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 05:50:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:50:49,190 INFO L225 Difference]: With dead ends: 41 [2022-07-14 05:50:49,190 INFO L226 Difference]: Without dead ends: 38 [2022-07-14 05:50:49,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-14 05:50:49,195 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:50:49,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:50:49,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-14 05:50:49,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-14 05:50:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:49,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-07-14 05:50:49,221 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 7 [2022-07-14 05:50:49,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:50:49,222 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-07-14 05:50:49,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:49,222 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-07-14 05:50:49,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 05:50:49,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:50:49,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:50:49,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 05:50:49,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:50:49,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:50:49,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1213452566, now seen corresponding path program 1 times [2022-07-14 05:50:49,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:50:49,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774120366] [2022-07-14 05:50:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:49,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:50:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:50:49,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:50:49,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774120366] [2022-07-14 05:50:49,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774120366] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:50:49,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:50:49,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 05:50:49,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958567287] [2022-07-14 05:50:49,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:50:49,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 05:50:49,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:50:49,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 05:50:49,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 05:50:49,292 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-07-14 05:50:49,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:50:49,332 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-07-14 05:50:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 05:50:49,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 [2022-07-14 05:50:49,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:50:49,334 INFO L225 Difference]: With dead ends: 64 [2022-07-14 05:50:49,334 INFO L226 Difference]: Without dead ends: 64 [2022-07-14 05:50:49,334 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 [2022-07-14 05:50:49,336 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 30 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:50:49,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 84 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:50:49,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-14 05:50:49,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2022-07-14 05:50:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-07-14 05:50:49,341 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 9 [2022-07-14 05:50:49,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:50:49,342 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-07-14 05:50:49,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-07-14 05:50:49,342 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-07-14 05:50:49,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 05:50:49,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:50:49,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:50:49,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 05:50:49,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:50:49,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:50:49,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1213452567, now seen corresponding path program 1 times [2022-07-14 05:50:49,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:50:49,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401635237] [2022-07-14 05:50:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:49,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:50:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:50:49,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:50:49,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401635237] [2022-07-14 05:50:49,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401635237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:50:49,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:50:49,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 05:50:49,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604814393] [2022-07-14 05:50:49,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:50:49,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 05:50:49,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:50:49,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 05:50:49,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 05:50:49,397 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-07-14 05:50:49,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:50:49,432 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-07-14 05:50:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 05:50:49,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 [2022-07-14 05:50:49,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:50:49,435 INFO L225 Difference]: With dead ends: 63 [2022-07-14 05:50:49,436 INFO L226 Difference]: Without dead ends: 63 [2022-07-14 05:50:49,437 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 [2022-07-14 05:50:49,438 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 30 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:50:49,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:50:49,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-14 05:50:49,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2022-07-14 05:50:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-07-14 05:50:49,447 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 9 [2022-07-14 05:50:49,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:50:49,448 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-07-14 05:50:49,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-07-14 05:50:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-07-14 05:50:49,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 05:50:49,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:50:49,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:50:49,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 05:50:49,451 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:50:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:50:49,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2104757995, now seen corresponding path program 1 times [2022-07-14 05:50:49,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:50:49,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792078895] [2022-07-14 05:50:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:49,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:50:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:50:49,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:50:49,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792078895] [2022-07-14 05:50:49,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792078895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:50:49,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:50:49,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 05:50:49,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596538181] [2022-07-14 05:50:49,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:50:49,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 05:50:49,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:50:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 05:50:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:50:49,509 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:49,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:50:49,554 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2022-07-14 05:50:49,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:50:49,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-14 05:50:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:50:49,555 INFO L225 Difference]: With dead ends: 74 [2022-07-14 05:50:49,556 INFO L226 Difference]: Without dead ends: 74 [2022-07-14 05:50:49,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 05:50:49,557 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 40 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:50:49,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 156 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:50:49,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-14 05:50:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 41. [2022-07-14 05:50:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.46875) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-07-14 05:50:49,563 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 11 [2022-07-14 05:50:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:50:49,563 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-07-14 05:50:49,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:49,563 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-07-14 05:50:49,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 05:50:49,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:50:49,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:50:49,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 05:50:49,565 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:50:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:50:49,565 INFO L85 PathProgramCache]: Analyzing trace with hash -48409076, now seen corresponding path program 1 times [2022-07-14 05:50:49,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:50:49,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742499052] [2022-07-14 05:50:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:49,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:50:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 05:50:49,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:50:49,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742499052] [2022-07-14 05:50:49,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742499052] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:50:49,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:50:49,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 05:50:49,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12569522] [2022-07-14 05:50:49,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:50:49,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 05:50:49,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:50:49,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 05:50:49,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 05:50:49,633 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:49,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:50:49,680 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-07-14 05:50:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 05:50:49,681 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-14 05:50:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:50:49,684 INFO L225 Difference]: With dead ends: 67 [2022-07-14 05:50:49,687 INFO L226 Difference]: Without dead ends: 67 [2022-07-14 05:50:49,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 05:50:49,689 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 85 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:50:49,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 120 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:50:49,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-14 05:50:49,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 45. [2022-07-14 05:50:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-07-14 05:50:49,703 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 14 [2022-07-14 05:50:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:50:49,704 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-07-14 05:50:49,704 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:49,704 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-07-14 05:50:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-14 05:50:49,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:50:49,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:50:49,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 05:50:49,707 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:50:49,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:50:49,707 INFO L85 PathProgramCache]: Analyzing trace with hash 347063660, now seen corresponding path program 1 times [2022-07-14 05:50:49,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:50:49,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942383928] [2022-07-14 05:50:49,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:49,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:50:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:50:49,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:50:49,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942383928] [2022-07-14 05:50:49,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942383928] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:50:49,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:50:49,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 05:50:49,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952958247] [2022-07-14 05:50:49,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:50:49,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 05:50:49,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:50:49,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 05:50:49,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 05:50:49,765 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:50:49,870 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2022-07-14 05:50:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 05:50:49,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-14 05:50:49,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:50:49,873 INFO L225 Difference]: With dead ends: 89 [2022-07-14 05:50:49,873 INFO L226 Difference]: Without dead ends: 89 [2022-07-14 05:50:49,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-14 05:50:49,874 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 169 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:50:49,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 152 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:50:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-14 05:50:49,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 47. [2022-07-14 05:50:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-07-14 05:50:49,880 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 15 [2022-07-14 05:50:49,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:50:49,880 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-07-14 05:50:49,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:49,880 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-07-14 05:50:49,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-14 05:50:49,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:50:49,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:50:49,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-14 05:50:49,881 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:50:49,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:50:49,882 INFO L85 PathProgramCache]: Analyzing trace with hash 347063661, now seen corresponding path program 1 times [2022-07-14 05:50:49,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:50:49,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467571476] [2022-07-14 05:50:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:49,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:50:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:50:49,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:50:49,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467571476] [2022-07-14 05:50:49,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467571476] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:50:49,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488998052] [2022-07-14 05:50:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:49,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:50:49,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:50:49,960 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 05:50:49,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 05:50:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:50,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 05:50:50,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:50:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:50:50,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:50:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:50:50,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488998052] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:50:50,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:50:50,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-14 05:50:50,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066570094] [2022-07-14 05:50:50,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:50:50,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 05:50:50,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:50:50,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 05:50:50,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-14 05:50:50,108 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:50,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:50:50,185 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2022-07-14 05:50:50,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 05:50:50,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-14 05:50:50,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:50:50,186 INFO L225 Difference]: With dead ends: 92 [2022-07-14 05:50:50,186 INFO L226 Difference]: Without dead ends: 92 [2022-07-14 05:50:50,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-07-14 05:50:50,187 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 178 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:50:50,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 99 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:50:50,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-14 05:50:50,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 47. [2022-07-14 05:50:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.394736842105263) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:50,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-07-14 05:50:50,192 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 15 [2022-07-14 05:50:50,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:50:50,192 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-07-14 05:50:50,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:50,192 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-07-14 05:50:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-14 05:50:50,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:50:50,193 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:50:50,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 05:50:50,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:50:50,413 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:50:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:50:50,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1541743515, now seen corresponding path program 2 times [2022-07-14 05:50:50,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:50:50,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893808767] [2022-07-14 05:50:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:50,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:50:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 05:50:50,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:50:50,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893808767] [2022-07-14 05:50:50,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893808767] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:50:50,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:50:50,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 05:50:50,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985728586] [2022-07-14 05:50:50,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:50:50,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 05:50:50,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:50:50,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 05:50:50,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 05:50:50,512 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:50,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:50:50,591 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2022-07-14 05:50:50,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 05:50:50,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-14 05:50:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:50:50,594 INFO L225 Difference]: With dead ends: 67 [2022-07-14 05:50:50,594 INFO L226 Difference]: Without dead ends: 67 [2022-07-14 05:50:50,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-14 05:50:50,597 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 174 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:50:50,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 73 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:50:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-14 05:50:50,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2022-07-14 05:50:50,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.368421052631579) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2022-07-14 05:50:50,613 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 23 [2022-07-14 05:50:50,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:50:50,615 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2022-07-14 05:50:50,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2022-07-14 05:50:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 05:50:50,616 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:50:50,616 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:50:50,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-14 05:50:50,616 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:50:50,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:50:50,617 INFO L85 PathProgramCache]: Analyzing trace with hash -300839492, now seen corresponding path program 1 times [2022-07-14 05:50:50,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:50:50,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590587373] [2022-07-14 05:50:50,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:50,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:50:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 05:50:50,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:50:50,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590587373] [2022-07-14 05:50:50,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590587373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:50:50,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:50:50,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 05:50:50,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876587918] [2022-07-14 05:50:50,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:50:50,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 05:50:50,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:50:50,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 05:50:50,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 05:50:50,723 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:50:50,765 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-07-14 05:50:50,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 05:50:50,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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 26 [2022-07-14 05:50:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:50:50,767 INFO L225 Difference]: With dead ends: 48 [2022-07-14 05:50:50,767 INFO L226 Difference]: Without dead ends: 48 [2022-07-14 05:50:50,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-14 05:50:50,769 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 96 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:50:50,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 89 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:50:50,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-14 05:50:50,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-07-14 05:50:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-07-14 05:50:50,773 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 26 [2022-07-14 05:50:50,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:50:50,773 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-07-14 05:50:50,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:50,773 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-07-14 05:50:50,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 05:50:50,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:50:50,774 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:50:50,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-14 05:50:50,774 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:50:50,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:50:50,775 INFO L85 PathProgramCache]: Analyzing trace with hash -299207194, now seen corresponding path program 1 times [2022-07-14 05:50:50,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:50:50,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240188455] [2022-07-14 05:50:50,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:50,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:50:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:50:50,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:50:50,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240188455] [2022-07-14 05:50:50,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240188455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:50:50,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30745599] [2022-07-14 05:50:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:50,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:50:50,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:50:50,910 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 05:50:50,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 05:50:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:51,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-14 05:50:51,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:50:51,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 05:50:51,094 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 05:50:51,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-14 05:50:51,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 05:50:51,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-14 05:50:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:50:51,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:50:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:50:51,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30745599] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:50:51,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:50:51,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-07-14 05:50:51,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699474022] [2022-07-14 05:50:51,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:50:51,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 05:50:51,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:50:51,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 05:50:51,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-07-14 05:50:51,473 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 21 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:52,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:50:52,034 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2022-07-14 05:50:52,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 05:50:52,035 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-14 05:50:52,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:50:52,035 INFO L225 Difference]: With dead ends: 84 [2022-07-14 05:50:52,036 INFO L226 Difference]: Without dead ends: 84 [2022-07-14 05:50:52,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2022-07-14 05:50:52,037 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 534 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:50:52,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 250 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 05:50:52,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-14 05:50:52,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 50. [2022-07-14 05:50:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:52,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2022-07-14 05:50:52,041 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 26 [2022-07-14 05:50:52,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:50:52,041 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2022-07-14 05:50:52,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:52,041 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2022-07-14 05:50:52,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 05:50:52,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:50:52,042 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:50:52,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-14 05:50:52,251 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,SelfDestructingSolverStorable9 [2022-07-14 05:50:52,252 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:50:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:50:52,252 INFO L85 PathProgramCache]: Analyzing trace with hash -299207193, now seen corresponding path program 1 times [2022-07-14 05:50:52,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:50:52,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845621843] [2022-07-14 05:50:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:52,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:50:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:50:52,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:50:52,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845621843] [2022-07-14 05:50:52,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845621843] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:50:52,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920103403] [2022-07-14 05:50:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:52,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:50:52,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:50:52,440 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 05:50:52,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 05:50:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:52,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-14 05:50:52,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:50:52,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 05:50:52,594 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 05:50:52,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-14 05:50:52,620 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 05:50:52,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-14 05:50:52,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 05:50:52,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 05:50:52,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:50:52,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-14 05:50:52,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:50:52,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 05:50:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:50:52,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:50:53,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 05:50:53,229 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 18 treesize of output 16 [2022-07-14 05:50:53,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-14 05:50:53,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-07-14 05:50:53,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:50:53,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:50:53,563 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 42 treesize of output 38 [2022-07-14 05:50:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:50:53,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920103403] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:50:53,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:50:53,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-07-14 05:50:53,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802031994] [2022-07-14 05:50:53,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:50:53,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-14 05:50:53,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:50:53,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-14 05:50:53,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-07-14 05:50:53,693 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:54,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:50:54,364 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-07-14 05:50:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 05:50:54,364 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 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 26 [2022-07-14 05:50:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:50:54,365 INFO L225 Difference]: With dead ends: 50 [2022-07-14 05:50:54,365 INFO L226 Difference]: Without dead ends: 50 [2022-07-14 05:50:54,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2022-07-14 05:50:54,366 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 29 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:50:54,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 555 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 189 Invalid, 0 Unknown, 123 Unchecked, 0.1s Time] [2022-07-14 05:50:54,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-14 05:50:54,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-14 05:50:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-07-14 05:50:54,369 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 26 [2022-07-14 05:50:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:50:54,369 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-07-14 05:50:54,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:54,370 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-07-14 05:50:54,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 05:50:54,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:50:54,370 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:50:54,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 05:50:54,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:50:54,580 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:50:54,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:50:54,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1625978896, now seen corresponding path program 1 times [2022-07-14 05:50:54,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:50:54,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311685187] [2022-07-14 05:50:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:54,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:50:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:50:54,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:50:54,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311685187] [2022-07-14 05:50:54,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311685187] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:50:54,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118317207] [2022-07-14 05:50:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:54,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:50:54,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:50:54,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 05:50:54,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 05:50:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:54,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-14 05:50:54,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:50:54,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 05:50:54,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-14 05:50:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:50:54,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:50:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:50:54,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118317207] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:50:54,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:50:54,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 15 [2022-07-14 05:50:54,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499192817] [2022-07-14 05:50:54,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:50:54,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 05:50:54,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:50:54,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 05:50:54,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-14 05:50:54,879 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:50:55,077 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-07-14 05:50:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 05:50:55,078 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-14 05:50:55,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:50:55,079 INFO L225 Difference]: With dead ends: 51 [2022-07-14 05:50:55,079 INFO L226 Difference]: Without dead ends: 51 [2022-07-14 05:50:55,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2022-07-14 05:50:55,080 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 238 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:50:55,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 186 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:50:55,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-14 05:50:55,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-07-14 05:50:55,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-07-14 05:50:55,083 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2022-07-14 05:50:55,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:50:55,083 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-07-14 05:50:55,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:50:55,084 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-07-14 05:50:55,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 05:50:55,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:50:55,084 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:50:55,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 05:50:55,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:50:55,308 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:50:55,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:50:55,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1624346598, now seen corresponding path program 2 times [2022-07-14 05:50:55,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:50:55,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766642127] [2022-07-14 05:50:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:50:55,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:50:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:50:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:50:55,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:50:55,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766642127] [2022-07-14 05:50:55,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766642127] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:50:55,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117700984] [2022-07-14 05:50:55,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:50:55,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:50:55,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:50:55,479 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 05:50:55,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 05:50:55,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:50:55,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:50:55,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-14 05:50:55,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:50:55,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 05:50:55,587 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 05:50:55,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 05:50:55,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 05:50:55,696 INFO L356 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-07-14 05:50:55,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-07-14 05:50:55,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 05:50:55,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2022-07-14 05:50:55,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 05:50:55,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:50:55,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 05:50:55,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 05:50:56,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:50:56,141 INFO L356 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-07-14 05:50:56,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 35 [2022-07-14 05:50:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:50:56,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:50:56,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-07-14 05:50:56,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-07-14 05:50:58,704 INFO L356 Elim1Store]: treesize reduction 26, result has 23.5 percent of original size [2022-07-14 05:50:58,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 406 treesize of output 275 [2022-07-14 05:50:58,714 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:50:58,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 251 [2022-07-14 05:50:58,734 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 6 treesize of output 4 [2022-07-14 05:50:58,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:50:58,864 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 36 treesize of output 34 [2022-07-14 05:51:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:51:04,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117700984] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:51:04,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:51:04,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-07-14 05:51:04,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705471518] [2022-07-14 05:51:04,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:51:04,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-14 05:51:04,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:51:04,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-14 05:51:04,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1212, Unknown=4, NotChecked=0, Total=1332 [2022-07-14 05:51:04,259 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:51:05,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:51:05,466 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-07-14 05:51:05,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 05:51:05,467 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-14 05:51:05,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:51:05,468 INFO L225 Difference]: With dead ends: 56 [2022-07-14 05:51:05,468 INFO L226 Difference]: Without dead ends: 56 [2022-07-14 05:51:05,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=354, Invalid=1898, Unknown=4, NotChecked=0, Total=2256 [2022-07-14 05:51:05,470 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 60 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:51:05,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 536 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 347 Invalid, 0 Unknown, 195 Unchecked, 0.2s Time] [2022-07-14 05:51:05,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-14 05:51:05,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2022-07-14 05:51:05,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:51:05,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-07-14 05:51:05,478 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 29 [2022-07-14 05:51:05,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:51:05,479 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-07-14 05:51:05,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:51:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-07-14 05:51:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 05:51:05,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:51:05,482 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:51:05,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 05:51:05,708 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,SelfDestructingSolverStorable12 [2022-07-14 05:51:05,709 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:51:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:51:05,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1624346597, now seen corresponding path program 2 times [2022-07-14 05:51:05,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:51:05,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76409840] [2022-07-14 05:51:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:51:05,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:51:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:51:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:51:05,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:51:05,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76409840] [2022-07-14 05:51:05,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76409840] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:51:05,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792944686] [2022-07-14 05:51:05,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:51:05,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:51:05,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:51:05,972 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 05:51:05,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 05:51:06,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:51:06,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:51:06,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-14 05:51:06,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:51:06,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 05:51:06,147 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 05:51:06,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-14 05:51:06,172 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 05:51:06,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 05:51:06,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 05:51:06,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 05:51:06,351 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-14 05:51:06,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 32 [2022-07-14 05:51:06,371 INFO L356 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-07-14 05:51:06,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-07-14 05:51:06,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 34 [2022-07-14 05:51:06,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-07-14 05:51:06,805 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 05:51:06,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 51 [2022-07-14 05:51:06,813 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 05:51:06,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 23 [2022-07-14 05:51:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:51:06,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:51:29,877 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| Int) (|#memory_$Pointer$.base| (Array Int (Array Int Int))) (|#memory_$Pointer$.offset| (Array Int (Array Int Int)))) (or (and (forall ((v_ArrVal_348 Int)) (<= (+ (select (select (let ((.cse0 (store |#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (store .cse0 |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| (store (select .cse0 |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20|) 0 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|))) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|) 4) (select (store |c_#length| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| v_ArrVal_348) (select (select (let ((.cse1 (store |#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (store .cse1 |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| (store (select .cse1 |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20|) 0 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|))) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|)))) (<= 0 (select (select (let ((.cse2 (store |#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (store .cse2 |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| (store (select .cse2 |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20|) 0 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|))) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20|) 0)))) is different from false [2022-07-14 05:51:30,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:30,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:30,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:30,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:30,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:30,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:30,473 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 127 treesize of output 121 [2022-07-14 05:51:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-07-14 05:51:32,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792944686] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:51:32,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:51:32,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 44 [2022-07-14 05:51:32,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560266374] [2022-07-14 05:51:32,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:51:32,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-14 05:51:32,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:51:32,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-14 05:51:32,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1759, Unknown=12, NotChecked=84, Total=1980 [2022-07-14 05:51:32,666 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 45 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 45 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:51:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:51:34,788 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2022-07-14 05:51:34,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 05:51:34,789 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 45 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-14 05:51:34,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:51:34,790 INFO L225 Difference]: With dead ends: 76 [2022-07-14 05:51:34,790 INFO L226 Difference]: Without dead ends: 76 [2022-07-14 05:51:34,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=427, Invalid=2757, Unknown=12, NotChecked=110, Total=3306 [2022-07-14 05:51:34,791 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 146 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 05:51:34,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 761 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 564 Invalid, 0 Unknown, 197 Unchecked, 0.4s Time] [2022-07-14 05:51:34,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-14 05:51:34,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2022-07-14 05:51:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:51:34,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2022-07-14 05:51:34,793 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 29 [2022-07-14 05:51:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:51:34,794 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2022-07-14 05:51:34,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 45 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:51:34,794 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2022-07-14 05:51:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 05:51:34,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:51:34,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:51:34,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-14 05:51:34,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:51:34,995 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:51:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:51:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash 485421372, now seen corresponding path program 2 times [2022-07-14 05:51:34,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:51:34,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633483012] [2022-07-14 05:51:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:51:34,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:51:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:51:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 05:51:35,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:51:35,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633483012] [2022-07-14 05:51:35,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633483012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:51:35,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996849702] [2022-07-14 05:51:35,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:51:35,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:51:35,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:51:35,120 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 05:51:35,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 05:51:35,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:51:35,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:51:35,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 05:51:35,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:51:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 05:51:35,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:51:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 05:51:35,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996849702] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:51:35,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:51:35,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-14 05:51:35,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634476684] [2022-07-14 05:51:35,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:51:35,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 05:51:35,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:51:35,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 05:51:35,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-14 05:51:35,351 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:51:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:51:35,434 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2022-07-14 05:51:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 05:51:35,435 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-14 05:51:35,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:51:35,435 INFO L225 Difference]: With dead ends: 121 [2022-07-14 05:51:35,435 INFO L226 Difference]: Without dead ends: 121 [2022-07-14 05:51:35,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-07-14 05:51:35,436 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 94 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:51:35,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 318 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:51:35,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-14 05:51:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 82. [2022-07-14 05:51:35,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 81 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:51:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2022-07-14 05:51:35,440 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 32 [2022-07-14 05:51:35,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:51:35,440 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2022-07-14 05:51:35,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:51:35,440 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2022-07-14 05:51:35,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 05:51:35,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:51:35,441 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:51:35,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 05:51:35,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:51:35,656 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:51:35,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:51:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash 487053670, now seen corresponding path program 3 times [2022-07-14 05:51:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:51:35,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460221808] [2022-07-14 05:51:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:51:35,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:51:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:51:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:51:36,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:51:36,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460221808] [2022-07-14 05:51:36,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460221808] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:51:36,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759497108] [2022-07-14 05:51:36,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 05:51:36,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:51:36,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:51:36,119 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 05:51:36,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 05:51:36,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 05:51:36,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:51:36,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-14 05:51:36,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:51:36,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 05:51:36,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 05:51:36,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 05:51:36,309 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 05:51:36,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 05:51:36,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-14 05:51:36,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-14 05:51:36,491 INFO L356 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-07-14 05:51:36,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-07-14 05:51:36,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-14 05:51:36,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:36,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:36,604 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-14 05:51:36,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 47 [2022-07-14 05:51:42,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:42,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:42,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:42,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:42,617 INFO L356 Elim1Store]: treesize reduction 94, result has 10.5 percent of original size [2022-07-14 05:51:42,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 152 treesize of output 81 [2022-07-14 05:51:42,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:42,637 INFO L356 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-07-14 05:51:42,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 31 [2022-07-14 05:51:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 23 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:51:42,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:51:49,832 INFO L356 Elim1Store]: treesize reduction 339, result has 4.8 percent of original size [2022-07-14 05:51:49,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 10586 treesize of output 8093 [2022-07-14 05:51:49,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:49,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:51:49,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:51:51,137 INFO L356 Elim1Store]: treesize reduction 1076, result has 27.1 percent of original size [2022-07-14 05:51:51,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 15 new quantified variables, introduced 80 case distinctions, treesize of input 268450 treesize of output 115439 [2022-07-14 05:51:54,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:54,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:51:54,557 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:51:54,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 95162 treesize of output 90288 [2022-07-14 05:51:54,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:51:54,925 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:51:54,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90049 treesize of output 87111 [2022-07-14 05:51:59,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:51:59,503 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 6 treesize of output 4 [2022-07-14 05:51:59,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:51:59,959 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:51:59,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 77 [2022-07-14 05:52:00,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:00,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:00,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:00,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:00,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:00,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:00,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:00,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:01,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:01,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:01,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:01,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:01,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:01,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:01,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:12,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:12,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:12,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:12,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:12,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:12,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:13,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 05:52:13,094 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 6 treesize of output 4 [2022-07-14 05:52:13,107 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-07-14 05:52:13,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-07-14 05:52:13,294 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:52:13,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 05:52:13,618 INFO L356 Elim1Store]: treesize reduction 658, result has 19.3 percent of original size [2022-07-14 05:52:13,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 329913 treesize of output 199626 [2022-07-14 05:52:15,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:15,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:52:15,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:15,597 INFO L356 Elim1Store]: treesize reduction 103, result has 20.8 percent of original size [2022-07-14 05:52:15,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202180 treesize of output 99515 [2022-07-14 05:52:17,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:52:17,318 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:52:17,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 98768 treesize of output 91032 [2022-07-14 05:52:17,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:52:17,580 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:52:17,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90964 treesize of output 82780 [2022-07-14 05:52:49,486 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 6 treesize of output 4 [2022-07-14 05:52:50,811 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:52:50,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-07-14 05:52:51,067 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 6 treesize of output 4 [2022-07-14 05:52:51,083 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:52:51,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-07-14 05:52:51,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:52:51,104 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 55 treesize of output 53 [2022-07-14 05:52:52,137 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 05:52:52,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2022-07-14 05:52:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:52:52,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759497108] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:52:52,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:52:52,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 51 [2022-07-14 05:52:52,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98806470] [2022-07-14 05:52:52,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:52:52,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-14 05:52:52,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:52:52,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-14 05:52:52,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2409, Unknown=6, NotChecked=0, Total=2550 [2022-07-14 05:52:52,152 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 51 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 51 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:52:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:52:53,801 INFO L93 Difference]: Finished difference Result 137 states and 150 transitions. [2022-07-14 05:52:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 05:52:53,801 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 51 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-14 05:52:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:52:53,802 INFO L225 Difference]: With dead ends: 137 [2022-07-14 05:52:53,802 INFO L226 Difference]: Without dead ends: 137 [2022-07-14 05:52:53,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=211, Invalid=3443, Unknown=6, NotChecked=0, Total=3660 [2022-07-14 05:52:53,804 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 55 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:52:53,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 1529 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 435 Invalid, 0 Unknown, 301 Unchecked, 0.2s Time] [2022-07-14 05:52:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-14 05:52:53,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2022-07-14 05:52:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 102 states have (on average 1.2156862745098038) internal successors, (124), 110 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:52:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2022-07-14 05:52:53,809 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 32 [2022-07-14 05:52:53,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:52:53,809 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2022-07-14 05:52:53,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 51 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:52:53,809 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2022-07-14 05:52:53,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-14 05:52:53,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:52:53,810 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:52:53,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-14 05:52:54,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-14 05:52:54,024 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:52:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:52:54,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2131805143, now seen corresponding path program 1 times [2022-07-14 05:52:54,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:52:54,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797212402] [2022-07-14 05:52:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:52:54,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:52:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:52:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 05:52:54,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:52:54,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797212402] [2022-07-14 05:52:54,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797212402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:52:54,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:52:54,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 05:52:54,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086294752] [2022-07-14 05:52:54,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:52:54,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 05:52:54,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:52:54,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 05:52:54,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 05:52:54,136 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:52:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:52:54,250 INFO L93 Difference]: Finished difference Result 122 states and 135 transitions. [2022-07-14 05:52:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 05:52:54,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-14 05:52:54,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:52:54,252 INFO L225 Difference]: With dead ends: 122 [2022-07-14 05:52:54,252 INFO L226 Difference]: Without dead ends: 122 [2022-07-14 05:52:54,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-14 05:52:54,253 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 107 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:52:54,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 90 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:52:54,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-14 05:52:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2022-07-14 05:52:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 111 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:52:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2022-07-14 05:52:54,256 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 33 [2022-07-14 05:52:54,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:52:54,257 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2022-07-14 05:52:54,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:52:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2022-07-14 05:52:54,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-14 05:52:54,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:52:54,258 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:52:54,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-14 05:52:54,258 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:52:54,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:52:54,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2131805142, now seen corresponding path program 1 times [2022-07-14 05:52:54,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:52:54,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585955390] [2022-07-14 05:52:54,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:52:54,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:52:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:52:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 05:52:54,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:52:54,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585955390] [2022-07-14 05:52:54,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585955390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:52:54,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930815150] [2022-07-14 05:52:54,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:52:54,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:52:54,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:52:54,336 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 05:52:54,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 05:52:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:52:54,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-14 05:52:54,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:52:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-14 05:52:54,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:52:54,538 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:52:54,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-07-14 05:52:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-14 05:52:54,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930815150] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:52:54,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:52:54,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 11 [2022-07-14 05:52:54,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691567748] [2022-07-14 05:52:54,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:52:54,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 05:52:54,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:52:54,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 05:52:54,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-14 05:52:54,588 INFO L87 Difference]: Start difference. First operand 112 states and 127 transitions. Second operand has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 12 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) [2022-07-14 05:52:54,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:52:54,734 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2022-07-14 05:52:54,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 05:52:54,734 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 12 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) Word has length 33 [2022-07-14 05:52:54,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:52:54,735 INFO L225 Difference]: With dead ends: 117 [2022-07-14 05:52:54,735 INFO L226 Difference]: Without dead ends: 117 [2022-07-14 05:52:54,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-14 05:52:54,736 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 178 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:52:54,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 91 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:52:54,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-14 05:52:54,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2022-07-14 05:52:54,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 113 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:52:54,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2022-07-14 05:52:54,738 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 33 [2022-07-14 05:52:54,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:52:54,739 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2022-07-14 05:52:54,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 12 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) [2022-07-14 05:52:54,739 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2022-07-14 05:52:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-14 05:52:54,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:52:54,739 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:52:54,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-14 05:52:54,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-14 05:52:54,947 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:52:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:52:54,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1661451443, now seen corresponding path program 1 times [2022-07-14 05:52:54,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:52:54,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654334748] [2022-07-14 05:52:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:52:54,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:52:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:52:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-14 05:52:55,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:52:55,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654334748] [2022-07-14 05:52:55,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654334748] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:52:55,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884815199] [2022-07-14 05:52:55,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:52:55,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:52:55,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:52:55,023 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 05:52:55,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-14 05:52:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:52:55,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 05:52:55,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:52:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-14 05:52:55,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 05:52:55,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884815199] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:52:55,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 05:52:55,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2022-07-14 05:52:55,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386242753] [2022-07-14 05:52:55,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:52:55,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 05:52:55,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:52:55,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 05:52:55,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-14 05:52:55,184 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:52:55,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:52:55,259 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2022-07-14 05:52:55,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 05:52:55,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-14 05:52:55,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:52:55,261 INFO L225 Difference]: With dead ends: 117 [2022-07-14 05:52:55,261 INFO L226 Difference]: Without dead ends: 117 [2022-07-14 05:52:55,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-14 05:52:55,262 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 130 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:52:55,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 90 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:52:55,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-14 05:52:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2022-07-14 05:52:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 113 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:52:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2022-07-14 05:52:55,265 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 34 [2022-07-14 05:52:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:52:55,266 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2022-07-14 05:52:55,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:52:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2022-07-14 05:52:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 05:52:55,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:52:55,267 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:52:55,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-14 05:52:55,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:52:55,479 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-14 05:52:55,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:52:55,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1414755440, now seen corresponding path program 3 times [2022-07-14 05:52:55,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:52:55,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169050965] [2022-07-14 05:52:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:52:55,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:52:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 05:52:55,500 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 05:52:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 05:52:55,544 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 05:52:55,544 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-14 05:52:55,545 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (10 of 11 remaining) [2022-07-14 05:52:55,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2022-07-14 05:52:55,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2022-07-14 05:52:55,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2022-07-14 05:52:55,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2022-07-14 05:52:55,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2022-07-14 05:52:55,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2022-07-14 05:52:55,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (3 of 11 remaining) [2022-07-14 05:52:55,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE (2 of 11 remaining) [2022-07-14 05:52:55,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE (1 of 11 remaining) [2022-07-14 05:52:55,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2022-07-14 05:52:55,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-14 05:52:55,551 INFO L356 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:52:55,555 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-14 05:52:55,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.07 05:52:55 BoogieIcfgContainer [2022-07-14 05:52:55,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-14 05:52:55,612 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-14 05:52:55,612 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-14 05:52:55,612 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-14 05:52:55,613 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 05:50:48" (3/4) ... [2022-07-14 05:52:55,615 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-14 05:52:55,661 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-14 05:52:55,662 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-14 05:52:55,662 INFO L158 Benchmark]: Toolchain (without parser) took 127637.70ms. Allocated memory was 107.0MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 67.9MB in the beginning and 528.2MB in the end (delta: -460.3MB). Peak memory consumption was 625.4MB. Max. memory is 16.1GB. [2022-07-14 05:52:55,662 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 107.0MB. Free memory is still 86.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 05:52:55,663 INFO L158 Benchmark]: CACSL2BoogieTranslator took 366.05ms. Allocated memory is still 107.0MB. Free memory was 67.7MB in the beginning and 51.2MB in the end (delta: 16.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-07-14 05:52:55,663 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.48ms. Allocated memory is still 107.0MB. Free memory was 51.2MB in the beginning and 49.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 05:52:55,663 INFO L158 Benchmark]: Boogie Preprocessor took 41.06ms. Allocated memory is still 107.0MB. Free memory was 49.2MB in the beginning and 47.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 05:52:55,663 INFO L158 Benchmark]: RCFGBuilder took 412.08ms. Allocated memory is still 107.0MB. Free memory was 47.7MB in the beginning and 73.8MB in the end (delta: -26.2MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2022-07-14 05:52:55,664 INFO L158 Benchmark]: TraceAbstraction took 126704.04ms. Allocated memory was 107.0MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 73.2MB in the beginning and 531.3MB in the end (delta: -458.1MB). Peak memory consumption was 626.7MB. Max. memory is 16.1GB. [2022-07-14 05:52:55,664 INFO L158 Benchmark]: Witness Printer took 49.84ms. Allocated memory is still 1.2GB. Free memory was 531.3MB in the beginning and 528.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 05:52:55,665 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 107.0MB. Free memory is still 86.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 366.05ms. Allocated memory is still 107.0MB. Free memory was 67.7MB in the beginning and 51.2MB in the end (delta: 16.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.48ms. Allocated memory is still 107.0MB. Free memory was 51.2MB in the beginning and 49.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.06ms. Allocated memory is still 107.0MB. Free memory was 49.2MB in the beginning and 47.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 412.08ms. Allocated memory is still 107.0MB. Free memory was 47.7MB in the beginning and 73.8MB in the end (delta: -26.2MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * TraceAbstraction took 126704.04ms. Allocated memory was 107.0MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 73.2MB in the beginning and 531.3MB in the end (delta: -458.1MB). Peak memory consumption was 626.7MB. Max. memory is 16.1GB. * Witness Printer took 49.84ms. Allocated memory is still 1.2GB. Free memory was 531.3MB in the beginning and 528.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 613]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L603] int len = 2; VAL [len=2] [L604] len < 32 && __VERIFIER_nondet_int() [L604] len < 32 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, len=2, len < 32 && __VERIFIER_nondet_int()=0] [L604] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L607] CALL, EXPR sll_create(len + 1) [L575] SLL head = ((void *)0); VAL [\old(len)=3, head={0:0}, len=3] [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={0:0}, len=3, new_head={-1:0}] [L581] new_head->next = head VAL [\old(len)=3, head={0:0}, len=3, new_head={-1:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=3, head={-1:0}, len=2, new_head={-1:0}] [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-1:0}, len=2, new_head={-2:0}] [L581] new_head->next = head VAL [\old(len)=3, head={-1:0}, len=2, new_head={-2:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=3, head={-2:0}, len=1, new_head={-2:0}] [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-2:0}, len=1, new_head={-3:0}] [L581] new_head->next = head VAL [\old(len)=3, head={-2:0}, len=1, new_head={-3:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=3, head={-3:0}, len=0, new_head={-3:0}] [L576] COND FALSE !(len > 0) VAL [\old(len)=3, head={-3:0}, len=0, new_head={-3:0}] [L585] return head; VAL [\old(len)=3, \result={-3:0}, head={-3:0}, len=0, new_head={-3:0}] [L607] RET, EXPR sll_create(len + 1) [L607] SLL s = sll_create(len + 1); [L608] CALL, EXPR sll_length(s) [L588] int len = 0; VAL [head={-3:0}, head={-3:0}, len=0] [L589] COND TRUE \read(head) [L590] len++ VAL [head={-3:0}, head={-3:0}, len=1] [L591] EXPR head->next VAL [head={-3:0}, head={-3:0}, head->next={-2:0}, len=1] [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ VAL [head={-3:0}, head={-2:0}, len=2] [L591] EXPR head->next VAL [head={-2:0}, head={-3:0}, head->next={-1:0}, len=2] [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ VAL [head={-1:0}, head={-3:0}, len=3] [L591] EXPR head->next VAL [head={-3:0}, head={-1:0}, head->next={0:0}, len=3] [L591] head = head->next [L589] COND FALSE !(\read(head)) VAL [head={-3:0}, head={0:0}, len=3] [L593] return len; VAL [\result=3, head={-3:0}, head={0:0}, len=3] [L608] RET, EXPR sll_length(s) [L608] COND TRUE len != sll_length(s) [L613] reach_error() VAL [len=2, s={-3:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 126.6s, OverallIterations: 20, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2373 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2373 mSDsluCounter, 5316 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 816 IncrementalHoareTripleChecker+Unchecked, 4603 mSDsCounter, 145 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2520 IncrementalHoareTripleChecker+Invalid, 3481 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 145 mSolverCounterUnsat, 713 mSDtfsCounter, 2520 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 774 GetRequests, 419 SyntacticMatches, 10 SemanticMatches, 345 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 52.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=18, InterpolantAutomatonStates: 176, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 359 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 115.2s InterpolantComputationTime, 752 NumberOfCodeBlocks, 752 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 930 ConstructedInterpolants, 71 QuantifiedInterpolants, 13449 SizeOfPredicates, 151 NumberOfNonLiveVariables, 1915 ConjunctsInSsa, 407 ConjunctsInUnsatCore, 38 InterpolantComputations, 10 PerfectInterpolantSequences, 319/589 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-14 05:52:55,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup)