./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 03:30:35,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 03:30:35,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 03:30:35,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 03:30:35,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 03:30:35,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 03:30:35,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 03:30:35,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 03:30:35,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 03:30:35,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 03:30:35,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 03:30:35,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 03:30:35,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 03:30:35,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 03:30:35,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 03:30:35,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 03:30:35,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 03:30:35,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 03:30:35,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 03:30:35,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 03:30:35,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 03:30:35,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 03:30:35,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 03:30:35,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 03:30:35,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 03:30:35,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 03:30:35,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 03:30:35,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 03:30:35,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 03:30:35,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 03:30:35,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 03:30:35,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 03:30:35,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 03:30:35,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 03:30:35,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 03:30:35,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 03:30:35,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 03:30:35,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 03:30:35,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 03:30:35,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 03:30:35,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 03:30:35,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 03:30:35,667 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 03:30:35,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 03:30:35,667 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 03:30:35,668 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 03:30:35,668 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 03:30:35,668 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 03:30:35,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 03:30:35,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 03:30:35,669 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 03:30:35,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 03:30:35,670 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 03:30:35,670 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 03:30:35,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 03:30:35,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 03:30:35,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 03:30:35,671 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 03:30:35,671 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 03:30:35,671 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 03:30:35,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 03:30:35,671 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 03:30:35,671 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 03:30:35,671 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 03:30:35,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 03:30:35,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 03:30:35,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 03:30:35,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 03:30:35,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 03:30:35,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 03:30:35,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 03:30:35,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 03:30:35,673 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 03:30:35,673 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 03:30:35,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 03:30:35,673 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 03:30:35,673 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2023-02-17 03:30:35,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 03:30:35,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 03:30:35,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 03:30:35,913 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 03:30:35,913 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 03:30:35,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2023-02-17 03:30:37,084 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 03:30:37,268 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 03:30:37,269 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2023-02-17 03:30:37,283 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e338c8c31/165199a6535d43d6836349b48547dfbf/FLAG0e7e07611 [2023-02-17 03:30:37,301 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e338c8c31/165199a6535d43d6836349b48547dfbf [2023-02-17 03:30:37,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 03:30:37,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 03:30:37,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 03:30:37,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 03:30:37,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 03:30:37,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 03:30:37" (1/1) ... [2023-02-17 03:30:37,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f00a6a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:37, skipping insertion in model container [2023-02-17 03:30:37,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 03:30:37" (1/1) ... [2023-02-17 03:30:37,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 03:30:37,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 03:30:37,517 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2023-02-17 03:30:37,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 03:30:37,525 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 03:30:37,561 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2023-02-17 03:30:37,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 03:30:37,579 INFO L208 MainTranslator]: Completed translation [2023-02-17 03:30:37,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:37 WrapperNode [2023-02-17 03:30:37,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 03:30:37,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 03:30:37,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 03:30:37,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 03:30:37,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:37" (1/1) ... [2023-02-17 03:30:37,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:37" (1/1) ... [2023-02-17 03:30:37,619 INFO L138 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 132 [2023-02-17 03:30:37,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 03:30:37,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 03:30:37,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 03:30:37,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 03:30:37,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:37" (1/1) ... [2023-02-17 03:30:37,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:37" (1/1) ... [2023-02-17 03:30:37,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:37" (1/1) ... [2023-02-17 03:30:37,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:37" (1/1) ... [2023-02-17 03:30:37,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:37" (1/1) ... [2023-02-17 03:30:37,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:37" (1/1) ... [2023-02-17 03:30:37,655 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:37" (1/1) ... [2023-02-17 03:30:37,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:37" (1/1) ... [2023-02-17 03:30:37,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 03:30:37,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 03:30:37,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 03:30:37,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 03:30:37,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:37" (1/1) ... [2023-02-17 03:30:37,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 03:30:37,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:37,714 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) [2023-02-17 03:30:37,733 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 [2023-02-17 03:30:37,757 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-02-17 03:30:37,758 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-02-17 03:30:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 03:30:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2023-02-17 03:30:37,759 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2023-02-17 03:30:37,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 03:30:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 03:30:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 03:30:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 03:30:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 03:30:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 03:30:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 03:30:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 03:30:37,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 03:30:37,868 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 03:30:37,870 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 03:30:37,904 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-02-17 03:30:38,100 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 03:30:38,106 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 03:30:38,106 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-17 03:30:38,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 03:30:38 BoogieIcfgContainer [2023-02-17 03:30:38,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 03:30:38,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 03:30:38,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 03:30:38,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 03:30:38,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 03:30:37" (1/3) ... [2023-02-17 03:30:38,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f529f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 03:30:38, skipping insertion in model container [2023-02-17 03:30:38,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:30:37" (2/3) ... [2023-02-17 03:30:38,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f529f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 03:30:38, skipping insertion in model container [2023-02-17 03:30:38,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 03:30:38" (3/3) ... [2023-02-17 03:30:38,115 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2023-02-17 03:30:38,130 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 03:30:38,130 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2023-02-17 03:30:38,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 03:30:38,168 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=PETRI_NET, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@62c28e41, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 03:30:38,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-02-17 03:30:38,173 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 80 states have internal predecessors, (96), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:38,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 03:30:38,182 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:38,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:38,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-02-17 03:30:38,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:38,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1721266506, now seen corresponding path program 1 times [2023-02-17 03:30:38,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:38,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184945154] [2023-02-17 03:30:38,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:38,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:38,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:30:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:38,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:38,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184945154] [2023-02-17 03:30:38,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184945154] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:38,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:38,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 03:30:38,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967985004] [2023-02-17 03:30:38,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:38,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 03:30:38,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:38,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 03:30:38,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 03:30:38,415 INFO L87 Difference]: Start difference. First operand has 86 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 80 states have internal predecessors, (96), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 03:30:38,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:38,439 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2023-02-17 03:30:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 03:30:38,441 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-17 03:30:38,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:38,447 INFO L225 Difference]: With dead ends: 86 [2023-02-17 03:30:38,447 INFO L226 Difference]: Without dead ends: 80 [2023-02-17 03:30:38,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 03:30:38,453 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:38,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:30:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-17 03:30:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-02-17 03:30:38,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 75 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2023-02-17 03:30:38,482 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 13 [2023-02-17 03:30:38,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:38,483 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2023-02-17 03:30:38,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 03:30:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2023-02-17 03:30:38,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 03:30:38,484 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:38,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:38,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 03:30:38,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-02-17 03:30:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:38,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1583427249, now seen corresponding path program 1 times [2023-02-17 03:30:38,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:38,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702664883] [2023-02-17 03:30:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:38,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:38,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:30:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:38,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:38,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702664883] [2023-02-17 03:30:38,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702664883] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:38,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:38,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 03:30:38,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891841609] [2023-02-17 03:30:38,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:38,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 03:30:38,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:38,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 03:30:38,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:30:38,615 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 03:30:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:38,732 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2023-02-17 03:30:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:30:38,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-17 03:30:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:38,734 INFO L225 Difference]: With dead ends: 141 [2023-02-17 03:30:38,734 INFO L226 Difference]: Without dead ends: 141 [2023-02-17 03:30:38,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:30:38,735 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 65 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:38,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 162 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:38,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-17 03:30:38,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 79. [2023-02-17 03:30:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 51 states have (on average 1.607843137254902) internal successors, (82), 74 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2023-02-17 03:30:38,743 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 15 [2023-02-17 03:30:38,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:38,743 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2023-02-17 03:30:38,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 03:30:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2023-02-17 03:30:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 03:30:38,745 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:38,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:38,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 03:30:38,745 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-02-17 03:30:38,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:38,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1583427248, now seen corresponding path program 1 times [2023-02-17 03:30:38,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:38,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669323915] [2023-02-17 03:30:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:38,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:38,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:30:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:38,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:38,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669323915] [2023-02-17 03:30:38,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669323915] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:38,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:38,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 03:30:38,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287541156] [2023-02-17 03:30:38,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:38,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 03:30:38,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:38,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 03:30:38,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:30:38,857 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 03:30:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:38,936 INFO L93 Difference]: Finished difference Result 142 states and 158 transitions. [2023-02-17 03:30:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 03:30:38,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-17 03:30:38,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:38,938 INFO L225 Difference]: With dead ends: 142 [2023-02-17 03:30:38,940 INFO L226 Difference]: Without dead ends: 142 [2023-02-17 03:30:38,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 03:30:38,942 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 67 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:38,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 197 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:38,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-02-17 03:30:38,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 78. [2023-02-17 03:30:38,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.588235294117647) internal successors, (81), 73 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2023-02-17 03:30:38,955 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 15 [2023-02-17 03:30:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:38,955 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2023-02-17 03:30:38,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 03:30:38,956 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2023-02-17 03:30:38,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 03:30:38,956 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:38,956 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] [2023-02-17 03:30:38,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 03:30:38,957 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-02-17 03:30:38,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:38,958 INFO L85 PathProgramCache]: Analyzing trace with hash 840693873, now seen corresponding path program 1 times [2023-02-17 03:30:38,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:38,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202322997] [2023-02-17 03:30:38,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:38,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:39,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:30:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:39,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-17 03:30:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:30:39,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:39,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202322997] [2023-02-17 03:30:39,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202322997] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:30:39,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710190537] [2023-02-17 03:30:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:39,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:39,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:39,135 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) [2023-02-17 03:30:39,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 03:30:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:39,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 03:30:39,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:30:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:39,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 03:30:39,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710190537] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:39,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 03:30:39,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-02-17 03:30:39,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486475025] [2023-02-17 03:30:39,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:39,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 03:30:39,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:39,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 03:30:39,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-02-17 03:30:39,296 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 03:30:39,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:39,353 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2023-02-17 03:30:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 03:30:39,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-02-17 03:30:39,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:39,355 INFO L225 Difference]: With dead ends: 80 [2023-02-17 03:30:39,356 INFO L226 Difference]: Without dead ends: 80 [2023-02-17 03:30:39,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-02-17 03:30:39,362 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 3 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:39,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 453 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:30:39,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-17 03:30:39,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-02-17 03:30:39,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 75 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2023-02-17 03:30:39,372 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 26 [2023-02-17 03:30:39,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:39,373 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2023-02-17 03:30:39,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 03:30:39,374 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2023-02-17 03:30:39,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 03:30:39,374 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:39,375 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] [2023-02-17 03:30:39,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 03:30:39,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:39,581 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-02-17 03:30:39,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:39,582 INFO L85 PathProgramCache]: Analyzing trace with hash -838491758, now seen corresponding path program 1 times [2023-02-17 03:30:39,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:39,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719497646] [2023-02-17 03:30:39,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:39,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:39,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:30:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:39,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 03:30:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:30:39,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:39,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719497646] [2023-02-17 03:30:39,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719497646] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:30:39,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150093433] [2023-02-17 03:30:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:39,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:39,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:39,750 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) [2023-02-17 03:30:39,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 03:30:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:39,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 03:30:39,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:30:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:39,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:30:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:30:39,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150093433] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:30:39,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:30:39,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-02-17 03:30:39,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073931741] [2023-02-17 03:30:39,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:30:39,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 03:30:39,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:39,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 03:30:39,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-02-17 03:30:39,954 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 03:30:40,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:40,123 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2023-02-17 03:30:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 03:30:40,124 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2023-02-17 03:30:40,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:40,126 INFO L225 Difference]: With dead ends: 103 [2023-02-17 03:30:40,126 INFO L226 Difference]: Without dead ends: 103 [2023-02-17 03:30:40,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-02-17 03:30:40,127 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 31 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:40,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 930 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-17 03:30:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2023-02-17 03:30:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 80 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2023-02-17 03:30:40,131 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 31 [2023-02-17 03:30:40,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:40,132 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2023-02-17 03:30:40,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 03:30:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2023-02-17 03:30:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 03:30:40,133 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:40,133 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:40,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 03:30:40,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:40,358 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-02-17 03:30:40,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash -686979823, now seen corresponding path program 2 times [2023-02-17 03:30:40,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:40,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567121319] [2023-02-17 03:30:40,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:40,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:40,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:30:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:40,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-17 03:30:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 03:30:40,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:40,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567121319] [2023-02-17 03:30:40,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567121319] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:30:40,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608098649] [2023-02-17 03:30:40,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:30:40,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:40,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:40,491 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) [2023-02-17 03:30:40,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 03:30:40,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:30:40,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:30:40,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 03:30:40,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:30:40,584 INFO L350 Elim1Store]: Elim1 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 [2023-02-17 03:30:40,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:40,593 INFO L350 Elim1Store]: Elim1 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 39 [2023-02-17 03:30:40,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:40,604 INFO L350 Elim1Store]: Elim1 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 28 [2023-02-17 03:30:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 03:30:40,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 03:30:40,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608098649] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:40,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 03:30:40,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-17 03:30:40,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674457532] [2023-02-17 03:30:40,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:40,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:30:40,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:40,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:30:40,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-02-17 03:30:40,624 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 03:30:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:40,664 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2023-02-17 03:30:40,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:30:40,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2023-02-17 03:30:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:40,665 INFO L225 Difference]: With dead ends: 95 [2023-02-17 03:30:40,665 INFO L226 Difference]: Without dead ends: 95 [2023-02-17 03:30:40,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-02-17 03:30:40,666 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 65 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:40,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 75 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:30:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-17 03:30:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2023-02-17 03:30:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 78 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2023-02-17 03:30:40,669 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 36 [2023-02-17 03:30:40,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:40,670 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2023-02-17 03:30:40,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 03:30:40,670 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2023-02-17 03:30:40,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 03:30:40,670 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:40,671 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:40,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 03:30:40,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:40,876 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-02-17 03:30:40,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:40,877 INFO L85 PathProgramCache]: Analyzing trace with hash -686979822, now seen corresponding path program 1 times [2023-02-17 03:30:40,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:40,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928111508] [2023-02-17 03:30:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:40,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:40,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:30:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:40,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-17 03:30:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 03:30:40,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:40,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928111508] [2023-02-17 03:30:40,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928111508] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:30:40,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241101914] [2023-02-17 03:30:40,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:40,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:40,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:40,989 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) [2023-02-17 03:30:40,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 03:30:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:41,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 03:30:41,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:30:41,060 INFO L350 Elim1Store]: Elim1 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 [2023-02-17 03:30:41,062 INFO L350 Elim1Store]: Elim1 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 [2023-02-17 03:30:41,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:41,070 INFO L350 Elim1Store]: Elim1 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 28 [2023-02-17 03:30:41,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:41,074 INFO L350 Elim1Store]: Elim1 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 15 [2023-02-17 03:30:41,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:41,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 59 [2023-02-17 03:30:41,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 03:30:41,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:41,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 95 [2023-02-17 03:30:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:41,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:30:41,451 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 26 [2023-02-17 03:30:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:30:41,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241101914] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:30:41,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:30:41,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 9] total 19 [2023-02-17 03:30:41,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473594452] [2023-02-17 03:30:41,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:30:41,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 03:30:41,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:41,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 03:30:41,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-02-17 03:30:41,589 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 03:30:41,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:41,946 INFO L93 Difference]: Finished difference Result 149 states and 165 transitions. [2023-02-17 03:30:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 03:30:41,947 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2023-02-17 03:30:41,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:41,948 INFO L225 Difference]: With dead ends: 149 [2023-02-17 03:30:41,948 INFO L226 Difference]: Without dead ends: 149 [2023-02-17 03:30:41,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=498, Unknown=0, NotChecked=0, Total=756 [2023-02-17 03:30:41,949 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1138 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:41,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1138 Valid, 202 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 03:30:41,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-17 03:30:41,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 81. [2023-02-17 03:30:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 76 states have internal predecessors, (84), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2023-02-17 03:30:41,955 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 36 [2023-02-17 03:30:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:41,955 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2023-02-17 03:30:41,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 03:30:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2023-02-17 03:30:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 03:30:41,956 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:41,957 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:41,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 03:30:42,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:42,163 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-02-17 03:30:42,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:42,164 INFO L85 PathProgramCache]: Analyzing trace with hash -296648915, now seen corresponding path program 1 times [2023-02-17 03:30:42,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:42,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511534400] [2023-02-17 03:30:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:42,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:42,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:30:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:42,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-17 03:30:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 03:30:42,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:42,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511534400] [2023-02-17 03:30:42,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511534400] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:42,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:42,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 03:30:42,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185937449] [2023-02-17 03:30:42,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:42,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 03:30:42,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:42,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 03:30:42,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-17 03:30:42,243 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 03:30:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:42,427 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2023-02-17 03:30:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 03:30:42,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2023-02-17 03:30:42,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:42,429 INFO L225 Difference]: With dead ends: 159 [2023-02-17 03:30:42,429 INFO L226 Difference]: Without dead ends: 159 [2023-02-17 03:30:42,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-02-17 03:30:42,430 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 471 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:42,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 264 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-17 03:30:42,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 86. [2023-02-17 03:30:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.4603174603174602) internal successors, (92), 81 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2023-02-17 03:30:42,434 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 39 [2023-02-17 03:30:42,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:42,434 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2023-02-17 03:30:42,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 03:30:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2023-02-17 03:30:42,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 03:30:42,435 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:42,435 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:42,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 03:30:42,435 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-02-17 03:30:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:42,436 INFO L85 PathProgramCache]: Analyzing trace with hash -296648914, now seen corresponding path program 1 times [2023-02-17 03:30:42,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:42,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346507444] [2023-02-17 03:30:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:42,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:42,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:30:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:42,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-17 03:30:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 03:30:42,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:42,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346507444] [2023-02-17 03:30:42,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346507444] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:42,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:42,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 03:30:42,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766555578] [2023-02-17 03:30:42,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:42,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 03:30:42,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:42,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 03:30:42,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-17 03:30:42,583 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 03:30:42,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:42,720 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2023-02-17 03:30:42,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 03:30:42,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2023-02-17 03:30:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:42,722 INFO L225 Difference]: With dead ends: 149 [2023-02-17 03:30:42,722 INFO L226 Difference]: Without dead ends: 149 [2023-02-17 03:30:42,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-02-17 03:30:42,724 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 498 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:42,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 248 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:42,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-17 03:30:42,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 86. [2023-02-17 03:30:42,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.4444444444444444) internal successors, (91), 81 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:42,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2023-02-17 03:30:42,729 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 39 [2023-02-17 03:30:42,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:42,730 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2023-02-17 03:30:42,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 03:30:42,730 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2023-02-17 03:30:42,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 03:30:42,731 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:42,731 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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] [2023-02-17 03:30:42,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 03:30:42,732 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-02-17 03:30:42,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:42,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1573341240, now seen corresponding path program 1 times [2023-02-17 03:30:42,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:42,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61637753] [2023-02-17 03:30:42,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:42,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:42,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:30:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:42,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-17 03:30:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 03:30:42,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:42,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61637753] [2023-02-17 03:30:42,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61637753] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:30:42,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:30:42,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 03:30:42,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368073129] [2023-02-17 03:30:42,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:30:42,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 03:30:42,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:42,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 03:30:42,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-17 03:30:42,804 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 03:30:42,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:42,879 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2023-02-17 03:30:42,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 03:30:42,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2023-02-17 03:30:42,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:42,881 INFO L225 Difference]: With dead ends: 128 [2023-02-17 03:30:42,881 INFO L226 Difference]: Without dead ends: 128 [2023-02-17 03:30:42,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-02-17 03:30:42,882 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 396 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:42,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 318 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:30:42,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-17 03:30:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 86. [2023-02-17 03:30:42,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 81 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2023-02-17 03:30:42,887 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 42 [2023-02-17 03:30:42,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:42,887 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2023-02-17 03:30:42,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 03:30:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2023-02-17 03:30:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 03:30:42,890 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:42,890 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:42,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 03:30:42,891 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-02-17 03:30:42,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:42,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1574973534, now seen corresponding path program 1 times [2023-02-17 03:30:42,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:42,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033210985] [2023-02-17 03:30:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:42,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:43,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:30:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:43,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-17 03:30:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:30:43,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:43,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033210985] [2023-02-17 03:30:43,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033210985] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:30:43,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852026216] [2023-02-17 03:30:43,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:43,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:43,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:43,099 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) [2023-02-17 03:30:43,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 03:30:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:43,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-17 03:30:43,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:30:43,200 INFO L350 Elim1Store]: Elim1 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 [2023-02-17 03:30:43,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:43,203 INFO L350 Elim1Store]: Elim1 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 39 [2023-02-17 03:30:43,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 03:30:43,339 INFO L350 Elim1Store]: Elim1 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 [2023-02-17 03:30:43,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:43,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 152 [2023-02-17 03:30:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:43,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:30:43,479 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 18 [2023-02-17 03:30:43,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:43,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 118 [2023-02-17 03:30:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:30:43,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852026216] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:30:43,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:30:43,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 25 [2023-02-17 03:30:43,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867763693] [2023-02-17 03:30:43,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:30:43,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-17 03:30:43,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:43,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-17 03:30:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2023-02-17 03:30:43,714 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 26 states, 25 states have (on average 2.6) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:44,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:44,468 INFO L93 Difference]: Finished difference Result 178 states and 197 transitions. [2023-02-17 03:30:44,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 03:30:44,468 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2023-02-17 03:30:44,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:44,469 INFO L225 Difference]: With dead ends: 178 [2023-02-17 03:30:44,469 INFO L226 Difference]: Without dead ends: 178 [2023-02-17 03:30:44,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=400, Invalid=1406, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 03:30:44,471 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1269 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:44,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1269 Valid, 924 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 03:30:44,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-17 03:30:44,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 97. [2023-02-17 03:30:44,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 91 states have internal predecessors, (103), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 03:30:44,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2023-02-17 03:30:44,474 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 42 [2023-02-17 03:30:44,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:44,474 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2023-02-17 03:30:44,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:44,474 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2023-02-17 03:30:44,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 03:30:44,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:44,475 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:44,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 03:30:44,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-17 03:30:44,684 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-02-17 03:30:44,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:44,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1574973535, now seen corresponding path program 1 times [2023-02-17 03:30:44,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:44,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481732084] [2023-02-17 03:30:44,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:44,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:44,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:30:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:44,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-17 03:30:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:30:45,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:45,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481732084] [2023-02-17 03:30:45,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481732084] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:30:45,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86186191] [2023-02-17 03:30:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:45,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:45,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:45,005 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) [2023-02-17 03:30:45,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 03:30:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:45,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-17 03:30:45,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:30:45,097 INFO L350 Elim1Store]: Elim1 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 [2023-02-17 03:30:45,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:45,136 INFO L350 Elim1Store]: Elim1 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 15 [2023-02-17 03:30:45,138 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-02-17 03:30:45,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 03:30:45,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 03:30:45,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:45,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 76 [2023-02-17 03:30:45,428 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 03:30:45,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-17 03:30:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:45,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:30:45,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86186191] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:30:45,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 03:30:45,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-02-17 03:30:45,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865732980] [2023-02-17 03:30:45,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 03:30:45,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 03:30:45,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:45,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 03:30:45,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2023-02-17 03:30:45,696 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:46,886 INFO L93 Difference]: Finished difference Result 206 states and 225 transitions. [2023-02-17 03:30:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-17 03:30:46,887 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2023-02-17 03:30:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:46,887 INFO L225 Difference]: With dead ends: 206 [2023-02-17 03:30:46,887 INFO L226 Difference]: Without dead ends: 206 [2023-02-17 03:30:46,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=520, Invalid=2236, Unknown=0, NotChecked=0, Total=2756 [2023-02-17 03:30:46,888 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 1892 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1892 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:46,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1892 Valid, 1002 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 03:30:46,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-02-17 03:30:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 97. [2023-02-17 03:30:46,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 91 states have internal predecessors, (102), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 03:30:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2023-02-17 03:30:46,891 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 42 [2023-02-17 03:30:46,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:46,891 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2023-02-17 03:30:46,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2023-02-17 03:30:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 03:30:46,891 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:46,892 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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, 1, 1, 1] [2023-02-17 03:30:46,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-17 03:30:47,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:47,092 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-02-17 03:30:47,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:47,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1812282727, now seen corresponding path program 1 times [2023-02-17 03:30:47,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:47,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291385541] [2023-02-17 03:30:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:47,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:47,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:30:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:47,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-17 03:30:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:30:47,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:47,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291385541] [2023-02-17 03:30:47,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291385541] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:30:47,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278778623] [2023-02-17 03:30:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:47,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:47,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:47,220 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) [2023-02-17 03:30:47,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 03:30:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:47,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-17 03:30:47,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:30:47,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 03:30:47,389 INFO L350 Elim1Store]: Elim1 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 [2023-02-17 03:30:47,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:47,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-02-17 03:30:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:47,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:30:47,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-17 03:30:47,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:47,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 143 [2023-02-17 03:30:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:30:47,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278778623] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:30:47,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:30:47,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 23 [2023-02-17 03:30:47,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71956087] [2023-02-17 03:30:47,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:30:47,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 03:30:47,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:30:47,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 03:30:47,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2023-02-17 03:30:47,549 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:47,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:30:47,915 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2023-02-17 03:30:47,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 03:30:47,915 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2023-02-17 03:30:47,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:30:47,916 INFO L225 Difference]: With dead ends: 149 [2023-02-17 03:30:47,916 INFO L226 Difference]: Without dead ends: 149 [2023-02-17 03:30:47,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2023-02-17 03:30:47,918 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 899 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:30:47,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 800 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:30:47,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-17 03:30:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 97. [2023-02-17 03:30:47,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 91 states have internal predecessors, (101), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 03:30:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2023-02-17 03:30:47,921 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 45 [2023-02-17 03:30:47,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:30:47,921 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2023-02-17 03:30:47,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:30:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2023-02-17 03:30:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 03:30:47,922 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:30:47,922 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:30:47,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 03:30:48,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:48,123 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-02-17 03:30:48,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:30:48,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1813915021, now seen corresponding path program 2 times [2023-02-17 03:30:48,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:30:48,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919781232] [2023-02-17 03:30:48,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:30:48,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:30:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:48,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 03:30:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:48,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-17 03:30:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:30:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 03:30:48,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:30:48,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919781232] [2023-02-17 03:30:48,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919781232] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:30:48,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820099436] [2023-02-17 03:30:48,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:30:48,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:30:48,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:30:48,479 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) [2023-02-17 03:30:48,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 03:30:48,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:30:48,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:30:48,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-17 03:30:48,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:30:48,583 INFO L350 Elim1Store]: Elim1 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 [2023-02-17 03:30:48,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 03:30:48,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 03:30:48,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:48,635 INFO L350 Elim1Store]: Elim1 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 15 [2023-02-17 03:30:48,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-17 03:30:48,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-17 03:30:48,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:48,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 171 [2023-02-17 03:30:48,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:48,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 139 [2023-02-17 03:30:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:30:48,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:30:49,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 03:30:49,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:49,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 7820 treesize of output 7317 [2023-02-17 03:30:49,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 03:30:49,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 40 select indices, 40 select index equivalence classes, 0 disjoint index pairs (out of 780 index pairs), introduced 49 new quantified variables, introduced 780 case distinctions, treesize of input 310014 treesize of output 261274