./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2n_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2n_insert_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93d1510274ba16ddd1276e8e93ff0a644bf6fb4a262c4c9dde32fe8591d5ce8c --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 06:18:21,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 06:18:21,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 06:18:21,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 06:18:21,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 06:18:21,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 06:18:21,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 06:18:21,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 06:18:21,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 06:18:21,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 06:18:21,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 06:18:21,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 06:18:21,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 06:18:21,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 06:18:21,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 06:18:21,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 06:18:21,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 06:18:21,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 06:18:21,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 06:18:21,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 06:18:21,510 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 06:18:21,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 06:18:21,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 06:18:21,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 06:18:21,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 06:18:21,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 06:18:21,528 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 06:18:21,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 06:18:21,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 06:18:21,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 06:18:21,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 06:18:21,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 06:18:21,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 06:18:21,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 06:18:21,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 06:18:21,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 06:18:21,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 06:18:21,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 06:18:21,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 06:18:21,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 06:18:21,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 06:18:21,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 06:18:21,537 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 06:18:21,553 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 06:18:21,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 06:18:21,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 06:18:21,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 06:18:21,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 06:18:21,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 06:18:21,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 06:18:21,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 06:18:21,555 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 06:18:21,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 06:18:21,555 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 06:18:21,556 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 06:18:21,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 06:18:21,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 06:18:21,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 06:18:21,556 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 06:18:21,556 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 06:18:21,557 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 06:18:21,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 06:18:21,557 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 06:18:21,557 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 06:18:21,557 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 06:18:21,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 06:18:21,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 06:18:21,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 06:18:21,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:18:21,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 06:18:21,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 06:18:21,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 06:18:21,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 06:18:21,559 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93d1510274ba16ddd1276e8e93ff0a644bf6fb4a262c4c9dde32fe8591d5ce8c [2022-07-20 06:18:21,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 06:18:21,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 06:18:21,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 06:18:21,800 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 06:18:21,801 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 06:18:21,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_insert_equal.i [2022-07-20 06:18:21,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b42674a8/f4634c1154e348ce884bcb89179296dd/FLAG71fdd2f4b [2022-07-20 06:18:22,283 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 06:18:22,284 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_insert_equal.i [2022-07-20 06:18:22,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b42674a8/f4634c1154e348ce884bcb89179296dd/FLAG71fdd2f4b [2022-07-20 06:18:22,303 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b42674a8/f4634c1154e348ce884bcb89179296dd [2022-07-20 06:18:22,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 06:18:22,306 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 06:18:22,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 06:18:22,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 06:18:22,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 06:18:22,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:18:22" (1/1) ... [2022-07-20 06:18:22,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ebf3dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:22, skipping insertion in model container [2022-07-20 06:18:22,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:18:22" (1/1) ... [2022-07-20 06:18:22,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 06:18:22,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 06:18:22,630 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-simple/dll2n_insert_equal.i[24706,24719] [2022-07-20 06:18:22,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:18:22,640 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 06:18:22,690 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-simple/dll2n_insert_equal.i[24706,24719] [2022-07-20 06:18:22,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:18:22,717 INFO L208 MainTranslator]: Completed translation [2022-07-20 06:18:22,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:22 WrapperNode [2022-07-20 06:18:22,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 06:18:22,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 06:18:22,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 06:18:22,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 06:18:22,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:22" (1/1) ... [2022-07-20 06:18:22,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:22" (1/1) ... [2022-07-20 06:18:22,778 INFO L137 Inliner]: procedures = 127, calls = 44, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 139 [2022-07-20 06:18:22,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 06:18:22,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 06:18:22,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 06:18:22,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 06:18:22,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:22" (1/1) ... [2022-07-20 06:18:22,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:22" (1/1) ... [2022-07-20 06:18:22,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:22" (1/1) ... [2022-07-20 06:18:22,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:22" (1/1) ... [2022-07-20 06:18:22,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:22" (1/1) ... [2022-07-20 06:18:22,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:22" (1/1) ... [2022-07-20 06:18:22,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:22" (1/1) ... [2022-07-20 06:18:22,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 06:18:22,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 06:18:22,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 06:18:22,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 06:18:22,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:22" (1/1) ... [2022-07-20 06:18:22,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:18:22,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:22,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 06:18:22,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 06:18:22,938 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-07-20 06:18:22,938 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-07-20 06:18:22,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 06:18:22,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 06:18:22,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 06:18:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 06:18:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 06:18:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 06:18:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 06:18:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 06:18:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-20 06:18:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 06:18:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 06:18:22,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 06:18:23,013 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 06:18:23,014 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 06:18:23,059 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-07-20 06:18:23,283 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 06:18:23,287 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 06:18:23,288 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-20 06:18:23,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:18:23 BoogieIcfgContainer [2022-07-20 06:18:23,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 06:18:23,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 06:18:23,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 06:18:23,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 06:18:23,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:18:22" (1/3) ... [2022-07-20 06:18:23,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25fc2e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:18:23, skipping insertion in model container [2022-07-20 06:18:23,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:18:22" (2/3) ... [2022-07-20 06:18:23,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25fc2e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:18:23, skipping insertion in model container [2022-07-20 06:18:23,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:18:23" (3/3) ... [2022-07-20 06:18:23,319 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_insert_equal.i [2022-07-20 06:18:23,330 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 06:18:23,331 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 53 error locations. [2022-07-20 06:18:23,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 06:18:23,369 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@637a8a3e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d30adc0 [2022-07-20 06:18:23,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2022-07-20 06:18:23,376 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 115 states have internal predecessors, (130), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:23,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-20 06:18:23,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:23,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-20 06:18:23,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:23,393 INFO L85 PathProgramCache]: Analyzing trace with hash 33471376, now seen corresponding path program 1 times [2022-07-20 06:18:23,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:23,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184672209] [2022-07-20 06:18:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:23,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:23,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:23,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184672209] [2022-07-20 06:18:23,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184672209] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:23,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:23,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:18:23,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640544540] [2022-07-20 06:18:23,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:23,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:18:23,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:23,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:18:23,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:23,614 INFO L87 Difference]: Start difference. First operand has 117 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 115 states have internal predecessors, (130), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:23,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:23,816 INFO L93 Difference]: Finished difference Result 207 states and 226 transitions. [2022-07-20 06:18:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:18:23,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-07-20 06:18:23,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:23,827 INFO L225 Difference]: With dead ends: 207 [2022-07-20 06:18:23,827 INFO L226 Difference]: Without dead ends: 200 [2022-07-20 06:18:23,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:23,833 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 110 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:23,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 230 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:18:23,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-20 06:18:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 108. [2022-07-20 06:18:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 58 states have (on average 2.0) internal successors, (116), 107 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:23,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2022-07-20 06:18:23,882 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 5 [2022-07-20 06:18:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:23,883 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2022-07-20 06:18:23,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:23,884 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2022-07-20 06:18:23,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-20 06:18:23,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:23,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-20 06:18:23,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 06:18:23,886 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:23,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:23,887 INFO L85 PathProgramCache]: Analyzing trace with hash 33471377, now seen corresponding path program 1 times [2022-07-20 06:18:23,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:23,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847671424] [2022-07-20 06:18:23,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:23,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:23,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:23,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847671424] [2022-07-20 06:18:23,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847671424] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:23,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:23,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:18:23,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481646534] [2022-07-20 06:18:23,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:23,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:18:23,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:23,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:18:23,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:23,956 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:24,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:24,071 INFO L93 Difference]: Finished difference Result 199 states and 214 transitions. [2022-07-20 06:18:24,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:18:24,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-07-20 06:18:24,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:24,075 INFO L225 Difference]: With dead ends: 199 [2022-07-20 06:18:24,075 INFO L226 Difference]: Without dead ends: 199 [2022-07-20 06:18:24,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:24,080 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 108 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:24,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 224 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:18:24,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-20 06:18:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 105. [2022-07-20 06:18:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 104 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2022-07-20 06:18:24,098 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 5 [2022-07-20 06:18:24,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:24,098 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2022-07-20 06:18:24,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2022-07-20 06:18:24,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 06:18:24,100 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:24,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:24,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 06:18:24,101 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:24,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:24,103 INFO L85 PathProgramCache]: Analyzing trace with hash 2100113040, now seen corresponding path program 1 times [2022-07-20 06:18:24,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:24,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425226324] [2022-07-20 06:18:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:24,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:24,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:24,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425226324] [2022-07-20 06:18:24,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425226324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:24,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:24,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:18:24,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635417453] [2022-07-20 06:18:24,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:24,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:18:24,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:24,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:18:24,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:24,137 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:24,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:24,167 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2022-07-20 06:18:24,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:18:24,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-20 06:18:24,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:24,172 INFO L225 Difference]: With dead ends: 115 [2022-07-20 06:18:24,173 INFO L226 Difference]: Without dead ends: 115 [2022-07-20 06:18:24,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:24,176 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 10 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:24,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 220 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:24,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-20 06:18:24,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2022-07-20 06:18:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 59 states have (on average 1.9322033898305084) internal successors, (114), 105 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2022-07-20 06:18:24,186 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 7 [2022-07-20 06:18:24,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:24,186 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2022-07-20 06:18:24,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:24,187 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2022-07-20 06:18:24,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 06:18:24,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:24,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:24,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 06:18:24,189 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:24,190 INFO L85 PathProgramCache]: Analyzing trace with hash 638916372, now seen corresponding path program 1 times [2022-07-20 06:18:24,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:24,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739783641] [2022-07-20 06:18:24,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:24,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:24,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:24,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739783641] [2022-07-20 06:18:24,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739783641] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:24,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:24,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:18:24,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060577541] [2022-07-20 06:18:24,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:24,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:18:24,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:24,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:18:24,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:24,251 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 3 states, 3 states have (on average 3.0) 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) [2022-07-20 06:18:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:24,264 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2022-07-20 06:18:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:18:24,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) 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 [2022-07-20 06:18:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:24,266 INFO L225 Difference]: With dead ends: 112 [2022-07-20 06:18:24,266 INFO L226 Difference]: Without dead ends: 112 [2022-07-20 06:18:24,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:24,267 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 1 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:24,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 215 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:24,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-20 06:18:24,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-07-20 06:18:24,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.859375) internal successors, (119), 110 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2022-07-20 06:18:24,278 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 9 [2022-07-20 06:18:24,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:24,278 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2022-07-20 06:18:24,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) 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) [2022-07-20 06:18:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2022-07-20 06:18:24,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 06:18:24,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:24,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:24,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 06:18:24,280 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:24,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:24,282 INFO L85 PathProgramCache]: Analyzing trace with hash -763066913, now seen corresponding path program 1 times [2022-07-20 06:18:24,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:24,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061064464] [2022-07-20 06:18:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:24,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:24,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:24,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061064464] [2022-07-20 06:18:24,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061064464] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:24,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297788660] [2022-07-20 06:18:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:24,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:24,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:24,344 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:18:24,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 06:18:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:24,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 06:18:24,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:24,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:18:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:24,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297788660] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:18:24,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:18:24,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-07-20 06:18:24,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061556197] [2022-07-20 06:18:24,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:18:24,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:18:24,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:24,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:18:24,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:24,519 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:24,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:24,544 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2022-07-20 06:18:24,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:18:24,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 14 [2022-07-20 06:18:24,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:24,545 INFO L225 Difference]: With dead ends: 113 [2022-07-20 06:18:24,545 INFO L226 Difference]: Without dead ends: 113 [2022-07-20 06:18:24,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:24,546 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 16 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:24,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 429 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:24,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-20 06:18:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-07-20 06:18:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 66 states have (on average 1.8333333333333333) internal successors, (121), 112 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2022-07-20 06:18:24,549 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 14 [2022-07-20 06:18:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:24,550 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2022-07-20 06:18:24,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2022-07-20 06:18:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 06:18:24,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:24,551 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:24,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 06:18:24,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:24,767 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:24,768 INFO L85 PathProgramCache]: Analyzing trace with hash -2097949021, now seen corresponding path program 1 times [2022-07-20 06:18:24,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:24,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481016317] [2022-07-20 06:18:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:24,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:24,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:24,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481016317] [2022-07-20 06:18:24,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481016317] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:24,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708218193] [2022-07-20 06:18:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:24,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:24,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:24,891 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:18:24,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 06:18:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:24,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 06:18:24,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:25,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:18:25,058 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:18:25,058 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 [2022-07-20 06:18:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:25,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:18:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:25,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708218193] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:18:25,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:18:25,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2022-07-20 06:18:25,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402825036] [2022-07-20 06:18:25,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:18:25,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:18:25,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:25,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:18:25,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:18:25,178 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand has 7 states, 6 states have (on average 4.5) 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) [2022-07-20 06:18:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:25,257 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2022-07-20 06:18:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:18:25,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) 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 16 [2022-07-20 06:18:25,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:25,258 INFO L225 Difference]: With dead ends: 124 [2022-07-20 06:18:25,258 INFO L226 Difference]: Without dead ends: 124 [2022-07-20 06:18:25,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:18:25,259 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 307 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:25,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 91 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-07-20 06:18:25,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-20 06:18:25,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 112. [2022-07-20 06:18:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 66 states have (on average 1.8181818181818181) internal successors, (120), 111 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2022-07-20 06:18:25,262 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 16 [2022-07-20 06:18:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:25,262 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2022-07-20 06:18:25,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) 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) [2022-07-20 06:18:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2022-07-20 06:18:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 06:18:25,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:25,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:25,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:25,479 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,SelfDestructingSolverStorable5 [2022-07-20 06:18:25,479 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:25,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:25,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2097949020, now seen corresponding path program 1 times [2022-07-20 06:18:25,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:25,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935061101] [2022-07-20 06:18:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:25,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:25,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:25,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935061101] [2022-07-20 06:18:25,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935061101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:25,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486519101] [2022-07-20 06:18:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:25,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:25,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:25,568 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:18:25,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 06:18:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:25,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 06:18:25,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:25,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:18:25,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:18:25,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:25,721 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 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:18:25,727 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:18:25,727 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 [2022-07-20 06:18:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:25,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:18:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:26,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486519101] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:18:26,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:18:26,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-20 06:18:26,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177721694] [2022-07-20 06:18:26,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:18:26,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:18:26,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:26,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:18:26,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:18:26,917 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:28,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:28,463 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2022-07-20 06:18:28,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:18:28,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 06:18:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:28,465 INFO L225 Difference]: With dead ends: 123 [2022-07-20 06:18:28,465 INFO L226 Difference]: Without dead ends: 123 [2022-07-20 06:18:28,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-07-20 06:18:28,466 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 132 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:28,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 200 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 154 Unchecked, 1.1s Time] [2022-07-20 06:18:28,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-20 06:18:28,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 111. [2022-07-20 06:18:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 66 states have (on average 1.803030303030303) internal successors, (119), 110 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2022-07-20 06:18:28,469 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 16 [2022-07-20 06:18:28,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:28,469 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2022-07-20 06:18:28,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2022-07-20 06:18:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 06:18:28,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:28,469 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:28,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:28,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:28,670 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:28,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1307957328, now seen corresponding path program 2 times [2022-07-20 06:18:28,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:28,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521663827] [2022-07-20 06:18:28,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:28,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:28,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:28,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521663827] [2022-07-20 06:18:28,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521663827] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:28,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372928690] [2022-07-20 06:18:28,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:18:28,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:28,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:28,971 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:18:28,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 06:18:29,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 06:18:29,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:18:29,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 06:18:29,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:29,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:18:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:29,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:18:29,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372928690] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:29,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:18:29,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-07-20 06:18:29,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145046527] [2022-07-20 06:18:29,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:29,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:18:29,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:29,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:18:29,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:29,138 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:29,206 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2022-07-20 06:18:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:18:29,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-20 06:18:29,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:29,208 INFO L225 Difference]: With dead ends: 120 [2022-07-20 06:18:29,208 INFO L226 Difference]: Without dead ends: 120 [2022-07-20 06:18:29,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:29,209 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 90 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:29,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 77 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:18:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-20 06:18:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2022-07-20 06:18:29,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 66 states have (on average 1.7575757575757576) internal successors, (116), 107 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:29,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2022-07-20 06:18:29,219 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 21 [2022-07-20 06:18:29,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:29,219 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2022-07-20 06:18:29,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:29,220 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2022-07-20 06:18:29,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 06:18:29,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:29,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:29,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:29,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:29,441 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:29,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1307957327, now seen corresponding path program 1 times [2022-07-20 06:18:29,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:29,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237646916] [2022-07-20 06:18:29,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:29,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:29,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:29,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237646916] [2022-07-20 06:18:29,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237646916] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:29,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42695205] [2022-07-20 06:18:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:29,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:29,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:29,541 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:18:29,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 06:18:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:29,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 06:18:29,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:29,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:18:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:29,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42695205] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:18:29,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:18:29,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-07-20 06:18:29,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692422227] [2022-07-20 06:18:29,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:18:29,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:18:29,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:29,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:18:29,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:18:29,704 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:29,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:29,744 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2022-07-20 06:18:29,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:18:29,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-07-20 06:18:29,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:29,745 INFO L225 Difference]: With dead ends: 108 [2022-07-20 06:18:29,746 INFO L226 Difference]: Without dead ends: 108 [2022-07-20 06:18:29,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:29,748 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 199 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:29,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 104 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-20 06:18:29,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-07-20 06:18:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 66 states have (on average 1.7424242424242424) internal successors, (115), 107 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:29,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2022-07-20 06:18:29,754 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 21 [2022-07-20 06:18:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:29,754 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2022-07-20 06:18:29,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:29,755 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2022-07-20 06:18:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-20 06:18:29,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:29,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:29,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:29,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:29,975 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:29,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:29,975 INFO L85 PathProgramCache]: Analyzing trace with hash 2020822092, now seen corresponding path program 1 times [2022-07-20 06:18:29,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:29,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342003470] [2022-07-20 06:18:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:29,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:30,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:30,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342003470] [2022-07-20 06:18:30,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342003470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:30,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:30,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:18:30,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968805520] [2022-07-20 06:18:30,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:30,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:18:30,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:30,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:18:30,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:30,051 INFO L87 Difference]: Start difference. First operand 108 states and 115 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:30,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:30,102 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2022-07-20 06:18:30,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:18:30,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-20 06:18:30,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:30,103 INFO L225 Difference]: With dead ends: 105 [2022-07-20 06:18:30,103 INFO L226 Difference]: Without dead ends: 105 [2022-07-20 06:18:30,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:30,104 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 90 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:30,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 72 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:30,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-20 06:18:30,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-07-20 06:18:30,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 66 states have (on average 1.696969696969697) internal successors, (112), 104 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2022-07-20 06:18:30,107 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 22 [2022-07-20 06:18:30,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:30,117 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2022-07-20 06:18:30,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2022-07-20 06:18:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 06:18:30,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:30,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:30,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 06:18:30,118 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:30,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:30,119 INFO L85 PathProgramCache]: Analyzing trace with hash 157247510, now seen corresponding path program 1 times [2022-07-20 06:18:30,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:30,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748445290] [2022-07-20 06:18:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:30,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:18:30,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:30,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748445290] [2022-07-20 06:18:30,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748445290] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:30,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025647097] [2022-07-20 06:18:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:30,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:30,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:30,287 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:18:30,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 06:18:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:30,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 06:18:30,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:30,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:18:30,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:30,447 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 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:18:30,463 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:18:30,463 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 14 [2022-07-20 06:18:30,486 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:18:30,487 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 14 [2022-07-20 06:18:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 06:18:30,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:18:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 06:18:30,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025647097] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:18:30,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:18:30,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 8 [2022-07-20 06:18:30,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534317742] [2022-07-20 06:18:30,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:18:30,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 06:18:30,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 06:18:30,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:18:30,572 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 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) [2022-07-20 06:18:30,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:30,664 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2022-07-20 06:18:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:18:30,665 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 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) Word has length 27 [2022-07-20 06:18:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:30,666 INFO L225 Difference]: With dead ends: 110 [2022-07-20 06:18:30,666 INFO L226 Difference]: Without dead ends: 110 [2022-07-20 06:18:30,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:18:30,667 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 172 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:30,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 86 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:18:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-20 06:18:30,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2022-07-20 06:18:30,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 97 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:30,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2022-07-20 06:18:30,670 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 27 [2022-07-20 06:18:30,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:30,670 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2022-07-20 06:18:30,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 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) [2022-07-20 06:18:30,671 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2022-07-20 06:18:30,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 06:18:30,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:30,673 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:30,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:30,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:30,899 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:30,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:30,900 INFO L85 PathProgramCache]: Analyzing trace with hash 157247511, now seen corresponding path program 1 times [2022-07-20 06:18:30,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:30,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110114400] [2022-07-20 06:18:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:30,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 06:18:31,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:31,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110114400] [2022-07-20 06:18:31,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110114400] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:31,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753318603] [2022-07-20 06:18:31,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:31,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:31,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:31,010 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:18:31,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 06:18:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:31,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 06:18:31,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:31,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:18:31,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:31,156 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 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:18:31,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:31,185 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 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:18:31,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:31,232 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 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:18:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:31,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:18:31,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753318603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:31,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:18:31,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-07-20 06:18:31,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724059637] [2022-07-20 06:18:31,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:31,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:18:31,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:31,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:18:31,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:18:31,259 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:31,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:31,327 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2022-07-20 06:18:31,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:18:31,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 27 [2022-07-20 06:18:31,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:31,328 INFO L225 Difference]: With dead ends: 91 [2022-07-20 06:18:31,328 INFO L226 Difference]: Without dead ends: 91 [2022-07-20 06:18:31,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:18:31,329 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 145 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:31,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 59 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:18:31,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-20 06:18:31,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-07-20 06:18:31,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 90 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:31,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2022-07-20 06:18:31,331 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 27 [2022-07-20 06:18:31,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:31,331 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2022-07-20 06:18:31,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:31,331 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2022-07-20 06:18:31,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 06:18:31,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:31,331 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:31,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:31,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:31,540 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:31,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:31,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1248708524, now seen corresponding path program 1 times [2022-07-20 06:18:31,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:31,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669758390] [2022-07-20 06:18:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:31,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:18:31,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:31,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669758390] [2022-07-20 06:18:31,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669758390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:31,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:31,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 06:18:31,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884397005] [2022-07-20 06:18:31,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:31,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 06:18:31,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:31,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 06:18:31,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-20 06:18:31,652 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 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) [2022-07-20 06:18:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:31,883 INFO L93 Difference]: Finished difference Result 161 states and 176 transitions. [2022-07-20 06:18:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:18:31,884 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 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 30 [2022-07-20 06:18:31,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:31,885 INFO L225 Difference]: With dead ends: 161 [2022-07-20 06:18:31,885 INFO L226 Difference]: Without dead ends: 161 [2022-07-20 06:18:31,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-07-20 06:18:31,886 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 552 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:31,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 184 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:18:31,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-20 06:18:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 99. [2022-07-20 06:18:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.5810810810810811) internal successors, (117), 98 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2022-07-20 06:18:31,889 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 30 [2022-07-20 06:18:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:31,889 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2022-07-20 06:18:31,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 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) [2022-07-20 06:18:31,889 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2022-07-20 06:18:31,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 06:18:31,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:31,890 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:31,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 06:18:31,890 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:31,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:31,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1248708523, now seen corresponding path program 1 times [2022-07-20 06:18:31,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:31,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598833452] [2022-07-20 06:18:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:31,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:18:32,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:32,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598833452] [2022-07-20 06:18:32,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598833452] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:32,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:32,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 06:18:32,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628699273] [2022-07-20 06:18:32,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:32,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:18:32,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:32,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:18:32,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:18:32,029 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 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) [2022-07-20 06:18:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:32,275 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2022-07-20 06:18:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 06:18:32,275 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 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 30 [2022-07-20 06:18:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:32,276 INFO L225 Difference]: With dead ends: 150 [2022-07-20 06:18:32,276 INFO L226 Difference]: Without dead ends: 150 [2022-07-20 06:18:32,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-07-20 06:18:32,277 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 623 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:32,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 186 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:18:32,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-20 06:18:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 99. [2022-07-20 06:18:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.554054054054054) internal successors, (115), 98 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2022-07-20 06:18:32,279 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 30 [2022-07-20 06:18:32,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:32,279 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2022-07-20 06:18:32,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 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) [2022-07-20 06:18:32,279 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2022-07-20 06:18:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 06:18:32,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:32,291 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:32,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 06:18:32,291 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:32,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:32,292 INFO L85 PathProgramCache]: Analyzing trace with hash -55260162, now seen corresponding path program 1 times [2022-07-20 06:18:32,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:32,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964587627] [2022-07-20 06:18:32,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:32,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:32,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:32,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964587627] [2022-07-20 06:18:32,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964587627] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:32,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:32,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:18:32,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398403662] [2022-07-20 06:18:32,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:32,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:18:32,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:32,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:18:32,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:32,321 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:32,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:32,329 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2022-07-20 06:18:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:18:32,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-20 06:18:32,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:32,330 INFO L225 Difference]: With dead ends: 125 [2022-07-20 06:18:32,330 INFO L226 Difference]: Without dead ends: 125 [2022-07-20 06:18:32,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:18:32,331 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 48 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:32,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 156 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-20 06:18:32,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 94. [2022-07-20 06:18:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 93 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2022-07-20 06:18:32,333 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 31 [2022-07-20 06:18:32,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:32,333 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2022-07-20 06:18:32,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:32,333 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2022-07-20 06:18:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 06:18:32,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:32,334 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:32,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 06:18:32,334 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:32,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:32,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1713045098, now seen corresponding path program 1 times [2022-07-20 06:18:32,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:32,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309404561] [2022-07-20 06:18:32,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:32,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:32,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:32,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309404561] [2022-07-20 06:18:32,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309404561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:32,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:32,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:18:32,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728310493] [2022-07-20 06:18:32,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:32,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:18:32,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:32,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:18:32,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:32,368 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:32,442 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2022-07-20 06:18:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:18:32,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-20 06:18:32,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:32,443 INFO L225 Difference]: With dead ends: 103 [2022-07-20 06:18:32,443 INFO L226 Difference]: Without dead ends: 103 [2022-07-20 06:18:32,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:18:32,443 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 194 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:32,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 94 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:18:32,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-20 06:18:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2022-07-20 06:18:32,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 69 states have (on average 1.434782608695652) internal successors, (99), 90 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2022-07-20 06:18:32,445 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 32 [2022-07-20 06:18:32,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:32,445 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2022-07-20 06:18:32,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:32,445 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2022-07-20 06:18:32,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 06:18:32,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:32,446 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:32,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 06:18:32,446 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:32,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1713045097, now seen corresponding path program 1 times [2022-07-20 06:18:32,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:32,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812519688] [2022-07-20 06:18:32,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:32,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:18:32,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:32,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812519688] [2022-07-20 06:18:32,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812519688] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:32,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470047571] [2022-07-20 06:18:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:32,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:32,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:32,521 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:18:32,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 06:18:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:32,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 06:18:32,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:32,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:18:32,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470047571] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:32,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:18:32,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-20 06:18:32,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613530175] [2022-07-20 06:18:32,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:32,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:18:32,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:32,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:18:32,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:32,685 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:32,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:32,695 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-07-20 06:18:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:18:32,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-20 06:18:32,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:32,695 INFO L225 Difference]: With dead ends: 90 [2022-07-20 06:18:32,696 INFO L226 Difference]: Without dead ends: 90 [2022-07-20 06:18:32,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:18:32,696 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 79 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:32,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 155 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-20 06:18:32,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-20 06:18:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 89 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2022-07-20 06:18:32,698 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 32 [2022-07-20 06:18:32,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:32,698 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2022-07-20 06:18:32,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:32,698 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2022-07-20 06:18:32,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 06:18:32,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:32,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:32,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:32,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-20 06:18:32,913 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1563834333, now seen corresponding path program 1 times [2022-07-20 06:18:32,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:32,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932267250] [2022-07-20 06:18:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:32,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:18:32,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:32,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932267250] [2022-07-20 06:18:32,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932267250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:32,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299611101] [2022-07-20 06:18:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:32,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:32,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:32,960 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) [2022-07-20 06:18:32,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 06:18:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:33,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 06:18:33,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:33,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:18:33,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299611101] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:33,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:18:33,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2022-07-20 06:18:33,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679053103] [2022-07-20 06:18:33,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:33,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:18:33,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:33,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:18:33,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:18:33,221 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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) [2022-07-20 06:18:33,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:33,259 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2022-07-20 06:18:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:18:33,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 33 [2022-07-20 06:18:33,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:33,260 INFO L225 Difference]: With dead ends: 87 [2022-07-20 06:18:33,260 INFO L226 Difference]: Without dead ends: 87 [2022-07-20 06:18:33,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:18:33,260 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 194 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:33,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-20 06:18:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-07-20 06:18:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.3880597014925373) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:33,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2022-07-20 06:18:33,262 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 33 [2022-07-20 06:18:33,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:33,262 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2022-07-20 06:18:33,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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) [2022-07-20 06:18:33,262 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2022-07-20 06:18:33,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 06:18:33,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:33,263 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:33,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 06:18:33,463 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 [2022-07-20 06:18:33,463 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:33,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1234225649, now seen corresponding path program 1 times [2022-07-20 06:18:33,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:33,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633335314] [2022-07-20 06:18:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:33,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:33,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:33,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633335314] [2022-07-20 06:18:33,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633335314] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:33,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:33,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:18:33,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943646528] [2022-07-20 06:18:33,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:33,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:18:33,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:33,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:18:33,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:18:33,515 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:33,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:33,601 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2022-07-20 06:18:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:18:33,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-20 06:18:33,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:33,602 INFO L225 Difference]: With dead ends: 127 [2022-07-20 06:18:33,602 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 06:18:33,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:33,603 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 86 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:33,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 134 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:18:33,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 06:18:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 86. [2022-07-20 06:18:33,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 67 states have (on average 1.373134328358209) internal successors, (92), 85 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:33,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2022-07-20 06:18:33,605 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 34 [2022-07-20 06:18:33,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:33,605 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2022-07-20 06:18:33,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:33,605 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2022-07-20 06:18:33,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 06:18:33,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:33,606 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:33,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 06:18:33,606 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:33,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:33,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1234225648, now seen corresponding path program 1 times [2022-07-20 06:18:33,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:33,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723963337] [2022-07-20 06:18:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:33,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:18:33,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:33,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723963337] [2022-07-20 06:18:33,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723963337] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:33,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:33,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:18:33,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049781105] [2022-07-20 06:18:33,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:33,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:18:33,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:33,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:18:33,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:18:33,665 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:33,741 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2022-07-20 06:18:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:18:33,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-20 06:18:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:33,742 INFO L225 Difference]: With dead ends: 85 [2022-07-20 06:18:33,742 INFO L226 Difference]: Without dead ends: 85 [2022-07-20 06:18:33,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:33,743 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 58 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:33,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 106 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:18:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-20 06:18:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-07-20 06:18:33,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 67 states have (on average 1.3582089552238805) internal successors, (91), 84 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) [2022-07-20 06:18:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2022-07-20 06:18:33,750 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 34 [2022-07-20 06:18:33,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:33,750 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2022-07-20 06:18:33,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:33,750 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2022-07-20 06:18:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 06:18:33,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:33,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:33,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 06:18:33,752 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:33,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:33,753 INFO L85 PathProgramCache]: Analyzing trace with hash 393710610, now seen corresponding path program 1 times [2022-07-20 06:18:33,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:33,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313919794] [2022-07-20 06:18:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:33,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 06:18:33,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:33,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313919794] [2022-07-20 06:18:33,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313919794] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:18:33,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:18:33,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:18:33,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378778859] [2022-07-20 06:18:33,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:18:33,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:18:33,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:18:33,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:18:33,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:18:33,800 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:18:33,856 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2022-07-20 06:18:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:18:33,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-20 06:18:33,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:18:33,857 INFO L225 Difference]: With dead ends: 82 [2022-07-20 06:18:33,858 INFO L226 Difference]: Without dead ends: 82 [2022-07-20 06:18:33,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:18:33,858 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 178 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:18:33,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 71 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:18:33,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-20 06:18:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-07-20 06:18:33,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 67 states have (on average 1.3134328358208955) internal successors, (88), 81 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2022-07-20 06:18:33,860 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 35 [2022-07-20 06:18:33,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:18:33,861 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2022-07-20 06:18:33,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:18:33,861 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2022-07-20 06:18:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 06:18:33,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:18:33,861 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:18:33,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 06:18:33,862 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2022-07-20 06:18:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:18:33,862 INFO L85 PathProgramCache]: Analyzing trace with hash -522865965, now seen corresponding path program 1 times [2022-07-20 06:18:33,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:18:33,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941668452] [2022-07-20 06:18:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:33,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:18:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:34,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:34,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:18:34,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941668452] [2022-07-20 06:18:34,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941668452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:18:34,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931176511] [2022-07-20 06:18:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:18:34,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:18:34,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:18:34,224 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) [2022-07-20 06:18:34,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 06:18:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:18:34,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-20 06:18:34,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:18:34,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:18:34,488 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:18:34,488 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 [2022-07-20 06:18:34,543 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 13 treesize of output 9 [2022-07-20 06:18:34,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:34,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-07-20 06:18:34,621 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:18:34,621 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-20 06:18:34,756 INFO L356 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2022-07-20 06:18:34,756 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 34 treesize of output 57 [2022-07-20 06:18:34,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:34,813 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 14 treesize of output 16 [2022-07-20 06:18:34,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:34,825 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:18:34,825 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 65 treesize of output 55 [2022-07-20 06:18:34,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:34,842 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 14 treesize of output 16 [2022-07-20 06:18:34,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:34,853 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:18:34,853 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 65 treesize of output 55 [2022-07-20 06:18:34,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:34,877 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:18:34,878 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 65 treesize of output 55 [2022-07-20 06:18:34,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:18:34,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 06:18:34,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:18:35,067 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:18:35,067 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 21 [2022-07-20 06:18:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:18:35,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:18:35,240 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1703 (Array Int Int)) (v_ArrVal_1702 (Array Int Int))) (= (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1702))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_insert_~head#1.base|) |c_ULTIMATE.start_dll_insert_~head#1.offset|))) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1703) |c_ULTIMATE.start_dll_insert_~head#1.base|) |c_ULTIMATE.start_dll_insert_~head#1.offset|) 4))) 1)) is different from false [2022-07-20 06:18:35,257 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 72 treesize of output 64 [2022-07-20 06:18:35,261 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 30 treesize of output 28 [2022-07-20 06:18:37,044 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-20 06:18:37,044 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 211 treesize of output 141 [2022-07-20 06:18:37,600 INFO L356 Elim1Store]: treesize reduction 241, result has 54.1 percent of original size [2022-07-20 06:18:37,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 1078 treesize of output 1231